halo | excellent open source blog publishing application | Blog library

by halo-dev Java Version: v1.5.2 License: GPL-3.0

Download this library from

kandi X-RAY | halo Summary

halo is a Java library typically used in Web Site, Blog applications. halo has no bugs, it has no vulnerabilities, it has build file available, it has a Strong Copyleft License and it has high support. You can download it from GitHub.

✍ 一款现代化的开源博客 / CMS 系统。

Support

Quality

Security

License

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kandi-support Support

halo has a highly active ecosystem.
It has 21921 star(s) with 7444 fork(s). There are 455 watchers for this library.
There were 7 major release(s) in the last 6 months.
There are 93 open issues and 1052 have been closed. On average issues are closed in 1 days. There are 2 open pull requests and 0 closed requests.
It has a neutral sentiment in the developer community.
The latest version of halo is v1.5.2

halo Support

Best in #Blog

Average in #Blog

halo Support

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quality kandi Quality

halo has 0 bugs and 0 code smells.

halo Quality

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halo Quality

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security Security

halo has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
halo code analysis shows 0 unresolved vulnerabilities.
There are 0 security hotspots that need review.

halo Security

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halo Security

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license License

halo is licensed under the GPL-3.0 License. This license is Strong Copyleft.
Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

halo License

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halo License

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build Reuse

halo releases are available to install and integrate.
Build file is available. You can build the component from source.
Installation instructions are not available. Examples and code snippets are available.
It has 41788 lines of code, 2747 functions and 591 files.
It has medium code complexity. Code complexity directly impacts maintainability of the code.

halo Reuse

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halo Reuse

Best in #Blog

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Top functions reviewed by kandi - BETA

kandi has reviewed halo and discovered the below as its top functions. This is intended to give you an instant insight into halo implemented functionality, and help decide if they suit your requirements.

Handle a reply event .
Import data from a Multipart file .
Renders the document .
Tries to find a path from the given directory .
Retrieves a page with all parent comments .
Build the full path for a post .
EKS key .
Converts post page into listVO .
Merges old theme .
Gets the logs .

halo Key Features

✍ 一款现代化的开源博客 / CMS 系统。

halo Examples and Code Snippets

See all related Code Snippets

Fat Jar

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curl -L https://github.com/halo-dev/halo/releases/download/v1.4.17/halo-1.4.17.jar --output halo.jar

Docker

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docker run -it -d --name halo -p 8090:8090 -v ~/.halo:/root/.halo --restart=always halohub/halo

How to use TypeScript to make sure two objects have a same structure (without interface)?

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const en = {
  title: "My Website Project",
  description: "This is an example of a file which contains phrases and their keys",
  hello: "Hello!",
};

const de: Record<keyof typeof en, string> = {
  title: "Proyek Website Saya",
  description: "Ini adalah contoh dari sebuah file yang mengandung beberapa frasa beserta kata kuncinya",
  hello: "Halo!",
  cat: "Kucing", // this is highlighted as an error
};

Saving an ID value from an API to a User with GraphQL

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const { data } = await completeGame({
  variables: { addGame: { ...gameToComplete } },
});

const { data } = await completeGame({
  variables: { addGame: { gameId } },
});

-----------------------

const { data } = await completeGame({
  variables: { addGame: { ...gameToComplete } },
});

const { data } = await completeGame({
  variables: { addGame: { gameId } },
});

Formatting ForEach-Object Output in PS Script

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  $output = Import-CSV $DatabasePath -Delimiter "`t" | Sort-Object @{Expression= 'Year'; Descending = $true}, @{Expression='Song'; Ascending=$true}
    #$output
    $output | ForEach-Object {
        $album = $_.Album
        $year = $_.Year
        $year = $_.Song

        Write-Host "$Album ($Year)"
        etc...
        }

-----------------------

$prop1 =@{Expression= 'Year'; Descending = $true}
$prop2 =@{Expression='Album'; Ascending=$true}
$prop3 =@{Expression='Song'; Ascending=$true}

$tab = [char]9
$output = Import-CSV $DatabasePath -Delimiter "`t" | Sort-Object $prop1, $prop2, $prop3

    $test = @()
    $count = 0
    $output | ForEach-Object {
        $album = $_.Album
        $year = $_.Year
        $song = $_.Song
        if ($output[$count].album -like $output[$count -1].album){
           $test += "$tab$Song"
        } else{
            $test += "$Album ($Year)"
            $test += "$tab$Song"
        } $count++

    }  
    if ($path.Length -gt 0){
        $test | Out-File -Path $Path
    } else {
       $test | ForEach-Object {
           Write-Host $_
       }
    }

How to grab the ID of an artist so i can insert the album into the database with the artist's ID?

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INSERT INTO albums (name, artist) 
SELECT 'Holy Diver' AS album_name, id AS artist 
FROM artists 
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (
      VALUES ('Holy Diver'),
             ('Dream Evil')
     ) t(album_name)
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (SELECT 'Holy Diver' AS album_name
      UNION
      SELECT 'Dream Evil') t
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT UNNEST(ARRAY['Holy Diver','Dream Evil']) AS album_name,
       id AS artist 
FROM artists
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

-----------------------

INSERT INTO albums (name, artist) 
SELECT 'Holy Diver' AS album_name, id AS artist 
FROM artists 
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (
      VALUES ('Holy Diver'),
             ('Dream Evil')
     ) t(album_name)
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (SELECT 'Holy Diver' AS album_name
      UNION
      SELECT 'Dream Evil') t
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT UNNEST(ARRAY['Holy Diver','Dream Evil']) AS album_name,
       id AS artist 
FROM artists
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

-----------------------

INSERT INTO albums (name, artist) 
SELECT 'Holy Diver' AS album_name, id AS artist 
FROM artists 
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (
      VALUES ('Holy Diver'),
             ('Dream Evil')
     ) t(album_name)
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (SELECT 'Holy Diver' AS album_name
      UNION
      SELECT 'Dream Evil') t
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT UNNEST(ARRAY['Holy Diver','Dream Evil']) AS album_name,
       id AS artist 
FROM artists
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

-----------------------

INSERT INTO albums (name, artist) 
SELECT 'Holy Diver' AS album_name, id AS artist 
FROM artists 
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (
      VALUES ('Holy Diver'),
             ('Dream Evil')
     ) t(album_name)
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (SELECT 'Holy Diver' AS album_name
      UNION
      SELECT 'Dream Evil') t
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

INSERT INTO albums (name, artist) 
SELECT UNNEST(ARRAY['Holy Diver','Dream Evil']) AS album_name,
       id AS artist 
FROM artists
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

Is there a need or how to write a test on main.pl which is not module and run it using Perl Devel cover

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$ perl -I. -MDevel::Cover main.pl
$ cover

Detect if an image is negative

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# Imports:
import numpy as np
import cv2

# Image path
path = "D://opencvImages//"
fileName = "RPWBn.png"

# Reading an image in default mode:
inputImage = cv2.imread(path + fileName)

# Convert RGB to grayscale:
originalGrayscale = cv2.cvtColor(inputImage, cv2.COLOR_BGR2GRAY)

# Equalize histogram
grayscaleImage = cv2.equalizeHist(originalGrayscale)

# It might be interesting to you to check out the image equalization:
cv2.imshow("Image Equalized", grayscaleImage)
cv2.waitKey(0)

# Binarize the image with a fixed threshold:
minThresh = 128
_, binaryImage = cv2.threshold(grayscaleImage, minThresh, 255, cv2.THRESH_BINARY)

# Compute the percent of white pixels:
(imageHeight, imageWidth) = binaryImage .shape[:2]
whitePercent = cv2.countNonZero(binaryImage)/(imageHeight * imageWidth)

if whitePercent > 0.5:
    print("Correcting images...")
    # Correct the original (unequalized) image:
    originalGrayscale = 255 - originalGrayscale
    cv2.imshow("Correction - Original Image", originalGrayscale)

    # Correct the equalized image:
    grayscaleImage = 255 - grayscaleImage
    cv2.imshow("Correction - Equalized Image", grayscaleImage )
    cv2.waitKey(0)

    # Improve the brightness + contrast of the original image via 
    # CLAHE. 
    # Gray to BGR conversion:
    originalGrayscale = cv2.cvtColor(originalGrayscale , cv2.COLOR_GRAY2BGR)

    # Conversion to LAB:
    lab = cv2.cvtColor(originalGrayscale, cv2.COLOR_BGR2LAB)

    # Split the channels:
    l, a, b = cv2.split(lab)

    # Apply CLAHE to L-channel:
    # You might need to fiddle with the parameters:
    clahe = cv2.createCLAHE(clipLimit=7.0, tileGridSize=(1, 1))
    cl = clahe.apply(l)

    # Merge the CLAHE enhanced L-channel with the a and b channel:
    limg = cv2.merge((cl, a, b))

    # Conversion from LAB to BGR:
    final = cv2.cvtColor(limg, cv2.COLOR_LAB2BGR)
    cv2.imshow("Original Corrected and Enhanced", final)
    cv2.waitKey(0)

-----------------------

# Imports:
import numpy as np
import cv2

# Image path
path = "D://opencvImages//"
fileName = "RPWBn.png"

# Reading an image in default mode:
inputImage = cv2.imread(path + fileName)

# Convert RGB to grayscale:
originalGrayscale = cv2.cvtColor(inputImage, cv2.COLOR_BGR2GRAY)

# Equalize histogram
grayscaleImage = cv2.equalizeHist(originalGrayscale)

# It might be interesting to you to check out the image equalization:
cv2.imshow("Image Equalized", grayscaleImage)
cv2.waitKey(0)

# Binarize the image with a fixed threshold:
minThresh = 128
_, binaryImage = cv2.threshold(grayscaleImage, minThresh, 255, cv2.THRESH_BINARY)

# Compute the percent of white pixels:
(imageHeight, imageWidth) = binaryImage .shape[:2]
whitePercent = cv2.countNonZero(binaryImage)/(imageHeight * imageWidth)

if whitePercent > 0.5:
    print("Correcting images...")
    # Correct the original (unequalized) image:
    originalGrayscale = 255 - originalGrayscale
    cv2.imshow("Correction - Original Image", originalGrayscale)

    # Correct the equalized image:
    grayscaleImage = 255 - grayscaleImage
    cv2.imshow("Correction - Equalized Image", grayscaleImage )
    cv2.waitKey(0)

    # Improve the brightness + contrast of the original image via 
    # CLAHE. 
    # Gray to BGR conversion:
    originalGrayscale = cv2.cvtColor(originalGrayscale , cv2.COLOR_GRAY2BGR)

    # Conversion to LAB:
    lab = cv2.cvtColor(originalGrayscale, cv2.COLOR_BGR2LAB)

    # Split the channels:
    l, a, b = cv2.split(lab)

    # Apply CLAHE to L-channel:
    # You might need to fiddle with the parameters:
    clahe = cv2.createCLAHE(clipLimit=7.0, tileGridSize=(1, 1))
    cl = clahe.apply(l)

    # Merge the CLAHE enhanced L-channel with the a and b channel:
    limg = cv2.merge((cl, a, b))

    # Conversion from LAB to BGR:
    final = cv2.cvtColor(limg, cv2.COLOR_LAB2BGR)
    cv2.imshow("Original Corrected and Enhanced", final)
    cv2.waitKey(0)

-----------------------

# Imports:
import numpy as np
import cv2

# Image path
path = "D://opencvImages//"
fileName = "RPWBn.png"

# Reading an image in default mode:
inputImage = cv2.imread(path + fileName)

# Convert RGB to grayscale:
originalGrayscale = cv2.cvtColor(inputImage, cv2.COLOR_BGR2GRAY)

# Equalize histogram
grayscaleImage = cv2.equalizeHist(originalGrayscale)

# It might be interesting to you to check out the image equalization:
cv2.imshow("Image Equalized", grayscaleImage)
cv2.waitKey(0)

# Binarize the image with a fixed threshold:
minThresh = 128
_, binaryImage = cv2.threshold(grayscaleImage, minThresh, 255, cv2.THRESH_BINARY)

# Compute the percent of white pixels:
(imageHeight, imageWidth) = binaryImage .shape[:2]
whitePercent = cv2.countNonZero(binaryImage)/(imageHeight * imageWidth)

if whitePercent > 0.5:
    print("Correcting images...")
    # Correct the original (unequalized) image:
    originalGrayscale = 255 - originalGrayscale
    cv2.imshow("Correction - Original Image", originalGrayscale)

    # Correct the equalized image:
    grayscaleImage = 255 - grayscaleImage
    cv2.imshow("Correction - Equalized Image", grayscaleImage )
    cv2.waitKey(0)

    # Improve the brightness + contrast of the original image via 
    # CLAHE. 
    # Gray to BGR conversion:
    originalGrayscale = cv2.cvtColor(originalGrayscale , cv2.COLOR_GRAY2BGR)

    # Conversion to LAB:
    lab = cv2.cvtColor(originalGrayscale, cv2.COLOR_BGR2LAB)

    # Split the channels:
    l, a, b = cv2.split(lab)

    # Apply CLAHE to L-channel:
    # You might need to fiddle with the parameters:
    clahe = cv2.createCLAHE(clipLimit=7.0, tileGridSize=(1, 1))
    cl = clahe.apply(l)

    # Merge the CLAHE enhanced L-channel with the a and b channel:
    limg = cv2.merge((cl, a, b))

    # Conversion from LAB to BGR:
    final = cv2.cvtColor(limg, cv2.COLOR_LAB2BGR)
    cv2.imshow("Original Corrected and Enhanced", final)
    cv2.waitKey(0)

-----------------------

def invert_if_negative(img):
    img = my_contrast_stretch(img)
    # assuming image has fixed size of (1396, 1676)
    # corners
    top_left  = img[:200, :200].flatten()
    top_right = img[:200, 1250:].flatten()
    # more or less center
    center    = img[1000:1300, 500:800].flatten()
    threshold = 120 # or computed from average
    top_left  = top_left > threshold
    top_right = top_right > threshold
    center    = center > threshold
    perc_white_corners = (sum(top_left) + sum(top_right)) / (len(top_left) + len(top_right))
    perc_white_center = sum(center) / len(center)
    if perc_white_corners > perc_white_center:
        img = 255 - img
    return img

def my_contrast_stretch(img):
    if img.dtype == np.float64:
        img = (img * 255).astype(np.uint8)
    M=np.max(img)
    m=np.min(img)
    res = img - m
    res = res * (255 / (M - m))
    return res.astype(np.uint8)

-----------------------

def invert_if_negative(img):
    img = my_contrast_stretch(img)
    # assuming image has fixed size of (1396, 1676)
    # corners
    top_left  = img[:200, :200].flatten()
    top_right = img[:200, 1250:].flatten()
    # more or less center
    center    = img[1000:1300, 500:800].flatten()
    threshold = 120 # or computed from average
    top_left  = top_left > threshold
    top_right = top_right > threshold
    center    = center > threshold
    perc_white_corners = (sum(top_left) + sum(top_right)) / (len(top_left) + len(top_right))
    perc_white_center = sum(center) / len(center)
    if perc_white_corners > perc_white_center:
        img = 255 - img
    return img

def my_contrast_stretch(img):
    if img.dtype == np.float64:
        img = (img * 255).astype(np.uint8)
    M=np.max(img)
    m=np.min(img)
    res = img - m
    res = res * (255 / (M - m))
    return res.astype(np.uint8)

New programmer having trouble setting up a discord bot in discord.py to return amount of members in a voice channel

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# I'm suggest putting this outside of the on_message event
def game_plz(channel:discord.VoiceChannel):
    members = channel.members #finds members connected to the channel
    # channel.members is a list of discord.Member objects
    return len(members) # returns amount of members in the channel

# within your on_message event
    voice_channel = message.author.voice.channel
    msg = message.content

    if msg.startswith('!plz'):
        await message.channel.send(game_plz(voice_channel))
        # pass voice_channel as an argument into game_plz
        # voice_channel should be a discord.VoiceChannel object

Highcharts - Getting a 3d effect with selected pie chart slices

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  plotOptions: {
    pie: {
      type: 'pie',
      innerSize: '80%',
      allowPointSelect: true,
      slicedOffset: 0,
      states: {
        hover: {
          halo: null,
          brightness: 0,
        },
      },
      point: {
        events: {
          mouseOver: (obj) => {
            obj.target.graphic.attr({
                'stroke-width': 50,
                stroke: obj.target.color,
                zIndex: 3,
                filter: 'drop-shadow(0 0 10px black)'
              }).css({
                borderRadius: 20
              })
              .add();
          },
          mouseOut: (obj) => {
            obj.target.graphic.attr({
                'stroke-width': 1,
                stroke: obj.target.color,
                filter: 'transparent'
              }).css({
                borderRadius: 0
              })
              .add();
          },
        }
      }

    }
  },

-----------------------

document.addEventListener('DOMContentLoaded', function() {
  const chart = Highcharts.chart('container', getChartOptions())
})

/** 
 * Gets the highchart options for the pie chart.
 * Each data point has event handlers added to them 
 * To set the correct border widths
 */
function getChartOptions() {
  return {
    series: [{
      type: 'pie',
      innerSize: '80%',
      allowPointSelect: true,
      slicedOffset: 0,
      states: {
        // Remove default hover settings
        hover: {
          halo: null,
          brightness: 0,
        },
      },
      data: getMockData()
    }],
  };
}

/** 
 * Generates mock data for highcharts
 * Each data point has event handlers set up in the `events` property
 */
function getMockData() {
  return [{
      color: '#aaf',
      borderColor: '#aaf',
      y: 4,
      events: getEventHandlers(),
    },
    {
      color: '#afa',
      borderColor: '#afa',
      y: 3,
      events: getEventHandlers(),
    },
    {
      color: '#faa',
      borderColor: '#faa',
      y: 8,
      events: getEventHandlers(),
    },
  ]
}

/** 
 * Event handlers for highchart data points. 
 * The border width of the slice is set to 20 for `select` and `mouseOver`
 * The border width of the slice is set to 0 for `unselect` and `mouseOut` (except when the event is selected, in which case `mouseOut` shouldn't do anything)
 */
function getEventHandlers() {
  return {
    select: (obj) => {
      obj.target.update({
        borderWidth: 20
      });
      obj.target.graphic.toFront();
    },
    unselect: (obj) => {
      obj.target.update({
        borderWidth: 0
      });
    },
    mouseOver: (obj) => {
      obj.target.update({
        borderWidth: 20
      });
      obj.target.graphic.toFront();
    },
    mouseOut: (obj) => {
      if (!obj.target['selected']) {
        obj.target.update({
          borderWidth: 0
        });
      }
    },
  };
}

/* A drop shadow is the effect I want to accomplish, but it should be above the other slices. */
.highcharts-pie-series .highcharts-point-hover,
.highcharts-pie-series .highcharts-point-select {
  filter: drop-shadow(0 0 10px black);
}

<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container" style="width:100%; height:400px;"></div>

-----------------------

document.addEventListener('DOMContentLoaded', function() {
  const chart = Highcharts.chart('container', getChartOptions())
})

/** 
 * Gets the highchart options for the pie chart.
 * Each data point has event handlers added to them 
 * To set the correct border widths
 */
function getChartOptions() {
  return {
    series: [{
      type: 'pie',
      innerSize: '80%',
      allowPointSelect: true,
      slicedOffset: 0,
      states: {
        // Remove default hover settings
        hover: {
          halo: null,
          brightness: 0,
        },
      },
      data: getMockData()
    }],
  };
}

/** 
 * Generates mock data for highcharts
 * Each data point has event handlers set up in the `events` property
 */
function getMockData() {
  return [{
      color: '#aaf',
      borderColor: '#aaf',
      y: 4,
      events: getEventHandlers(),
    },
    {
      color: '#afa',
      borderColor: '#afa',
      y: 3,
      events: getEventHandlers(),
    },
    {
      color: '#faa',
      borderColor: '#faa',
      y: 8,
      events: getEventHandlers(),
    },
  ]
}

/** 
 * Event handlers for highchart data points. 
 * The border width of the slice is set to 20 for `select` and `mouseOver`
 * The border width of the slice is set to 0 for `unselect` and `mouseOut` (except when the event is selected, in which case `mouseOut` shouldn't do anything)
 */
function getEventHandlers() {
  return {
    select: (obj) => {
      obj.target.update({
        borderWidth: 20
      });
      obj.target.graphic.toFront();
    },
    unselect: (obj) => {
      obj.target.update({
        borderWidth: 0
      });
    },
    mouseOver: (obj) => {
      obj.target.update({
        borderWidth: 20
      });
      obj.target.graphic.toFront();
    },
    mouseOut: (obj) => {
      if (!obj.target['selected']) {
        obj.target.update({
          borderWidth: 0
        });
      }
    },
  };
}

/* A drop shadow is the effect I want to accomplish, but it should be above the other slices. */
.highcharts-pie-series .highcharts-point-hover,
.highcharts-pie-series .highcharts-point-select {
  filter: drop-shadow(0 0 10px black);
}

<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container" style="width:100%; height:400px;"></div>

-----------------------

document.addEventListener('DOMContentLoaded', function() {
  const chart = Highcharts.chart('container', getChartOptions())
})

/** 
 * Gets the highchart options for the pie chart.
 * Each data point has event handlers added to them 
 * To set the correct border widths
 */
function getChartOptions() {
  return {
    series: [{
      type: 'pie',
      innerSize: '80%',
      allowPointSelect: true,
      slicedOffset: 0,
      states: {
        // Remove default hover settings
        hover: {
          halo: null,
          brightness: 0,
        },
      },
      data: getMockData()
    }],
  };
}

/** 
 * Generates mock data for highcharts
 * Each data point has event handlers set up in the `events` property
 */
function getMockData() {
  return [{
      color: '#aaf',
      borderColor: '#aaf',
      y: 4,
      events: getEventHandlers(),
    },
    {
      color: '#afa',
      borderColor: '#afa',
      y: 3,
      events: getEventHandlers(),
    },
    {
      color: '#faa',
      borderColor: '#faa',
      y: 8,
      events: getEventHandlers(),
    },
  ]
}

/** 
 * Event handlers for highchart data points. 
 * The border width of the slice is set to 20 for `select` and `mouseOver`
 * The border width of the slice is set to 0 for `unselect` and `mouseOut` (except when the event is selected, in which case `mouseOut` shouldn't do anything)
 */
function getEventHandlers() {
  return {
    select: (obj) => {
      obj.target.update({
        borderWidth: 20
      });
      obj.target.graphic.toFront();
    },
    unselect: (obj) => {
      obj.target.update({
        borderWidth: 0
      });
    },
    mouseOver: (obj) => {
      obj.target.update({
        borderWidth: 20
      });
      obj.target.graphic.toFront();
    },
    mouseOut: (obj) => {
      if (!obj.target['selected']) {
        obj.target.update({
          borderWidth: 0
        });
      }
    },
  };
}

/* A drop shadow is the effect I want to accomplish, but it should be above the other slices. */
.highcharts-pie-series .highcharts-point-hover,
.highcharts-pie-series .highcharts-point-select {
  filter: drop-shadow(0 0 10px black);
}

<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container" style="width:100%; height:400px;"></div>

Erasing Antialiased Shapes from a JavaFX Canvas

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if (stroke) {
    gc.setStroke(BG_COLOR);
    gc.strokeOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
}

import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

import java.util.Random;

public class Main extends Application {

    static final int NUM_CIRCLES = 500;
    static final int CIRCLE_DIAMETER = 10;
    static final double PANEL_WIDTH = 75.0;
    static final double PANEL_HEIGHT = 40.0;
    static final Color FG_COLOR = Color.rgb(10, 0, 200);
    static final Color BG_COLOR = Color.rgb(255, 255, 255);
    static final double BUTTON_WIDTH = 50.0;

    GraphicsContext gc;

    Random rand = new Random();
    private boolean stroke;

    double[] px = new double[NUM_CIRCLES];
    double[] py = new double[NUM_CIRCLES];

    void randomizeParticlePositions() {
        for (int i = 0; i < NUM_CIRCLES; i++) {
            px[i] = rand.nextDouble() * PANEL_WIDTH;
            py[i] = rand.nextDouble() * PANEL_HEIGHT;
        }
    }

    void drawCircles(Color color) {
        gc.setFill(color);
        for (int i = 0; i < NUM_CIRCLES; i++) {
            var screenX = px[i] * CIRCLE_DIAMETER;
            var screenY = py[i] * CIRCLE_DIAMETER;
            gc.fillOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
            if (stroke) {
                gc.setStroke(BG_COLOR);
                gc.strokeOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
            }
        }
    }

    @Override
    public void start(Stage stage) {
        String javaVersion = System.getProperty("java.version");
        String javafxVersion = System.getProperty("javafx.version");

        stage.setTitle("AntiAliasingGhosts -- erasing objects leaves ghosts in JavaFX");

        Label versionLabel = new Label("JavaFX " + javafxVersion
            + ", running on Java " + javaVersion + ".");

        double canvasWidth = (PANEL_WIDTH * CIRCLE_DIAMETER);
        double canvasHeight = (PANEL_HEIGHT * CIRCLE_DIAMETER);
        Canvas canvasRef = new Canvas(canvasWidth, canvasHeight);
        gc = canvasRef.getGraphicsContext2D();

        Button deBtn = new Button("Draw");
        deBtn.setPrefWidth(BUTTON_WIDTH);
        deBtn.setOnAction(e -> {
            String txt = deBtn.getText();
            switch (txt) {
                case "Draw" -> {
                    randomizeParticlePositions();
                    drawCircles(FG_COLOR);
                    deBtn.setText("Erase");
                    stroke = true;
                }
                case "Erase" -> {
                    drawCircles(BG_COLOR);
                    deBtn.setText("Draw");
                    stroke = false;
                }
                default ->
                    Platform.exit();
            }
        });

        Button exBtn = new Button("Exit");
        exBtn.setPrefWidth(BUTTON_WIDTH);
        exBtn.setOnAction(e -> Platform.exit());

        TilePane tp = new TilePane();
        tp.setAlignment(Pos.CENTER);
        tp.setHgap(10);
        tp.getChildren().addAll(deBtn, exBtn);

        VBox root = new VBox();
        root.setPadding(new Insets(7));
        root.setSpacing(10);
        root.setAlignment(Pos.CENTER);
        root.getChildren().addAll(versionLabel, canvasRef, tp);

        StackPane sp = new StackPane(root);
        BackgroundFill bf = new BackgroundFill(BG_COLOR, CornerRadii.EMPTY, Insets.EMPTY);
        Background bg = new Background(bf);
        sp.setBackground(bg);

        Scene scene = new Scene(sp, 640.0, 480.0);

        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }

}

-----------------------

if (stroke) {
    gc.setStroke(BG_COLOR);
    gc.strokeOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
}

import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

import java.util.Random;

public class Main extends Application {

    static final int NUM_CIRCLES = 500;
    static final int CIRCLE_DIAMETER = 10;
    static final double PANEL_WIDTH = 75.0;
    static final double PANEL_HEIGHT = 40.0;
    static final Color FG_COLOR = Color.rgb(10, 0, 200);
    static final Color BG_COLOR = Color.rgb(255, 255, 255);
    static final double BUTTON_WIDTH = 50.0;

    GraphicsContext gc;

    Random rand = new Random();
    private boolean stroke;

    double[] px = new double[NUM_CIRCLES];
    double[] py = new double[NUM_CIRCLES];

    void randomizeParticlePositions() {
        for (int i = 0; i < NUM_CIRCLES; i++) {
            px[i] = rand.nextDouble() * PANEL_WIDTH;
            py[i] = rand.nextDouble() * PANEL_HEIGHT;
        }
    }

    void drawCircles(Color color) {
        gc.setFill(color);
        for (int i = 0; i < NUM_CIRCLES; i++) {
            var screenX = px[i] * CIRCLE_DIAMETER;
            var screenY = py[i] * CIRCLE_DIAMETER;
            gc.fillOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
            if (stroke) {
                gc.setStroke(BG_COLOR);
                gc.strokeOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
            }
        }
    }

    @Override
    public void start(Stage stage) {
        String javaVersion = System.getProperty("java.version");
        String javafxVersion = System.getProperty("javafx.version");

        stage.setTitle("AntiAliasingGhosts -- erasing objects leaves ghosts in JavaFX");

        Label versionLabel = new Label("JavaFX " + javafxVersion
            + ", running on Java " + javaVersion + ".");

        double canvasWidth = (PANEL_WIDTH * CIRCLE_DIAMETER);
        double canvasHeight = (PANEL_HEIGHT * CIRCLE_DIAMETER);
        Canvas canvasRef = new Canvas(canvasWidth, canvasHeight);
        gc = canvasRef.getGraphicsContext2D();

        Button deBtn = new Button("Draw");
        deBtn.setPrefWidth(BUTTON_WIDTH);
        deBtn.setOnAction(e -> {
            String txt = deBtn.getText();
            switch (txt) {
                case "Draw" -> {
                    randomizeParticlePositions();
                    drawCircles(FG_COLOR);
                    deBtn.setText("Erase");
                    stroke = true;
                }
                case "Erase" -> {
                    drawCircles(BG_COLOR);
                    deBtn.setText("Draw");
                    stroke = false;
                }
                default ->
                    Platform.exit();
            }
        });

        Button exBtn = new Button("Exit");
        exBtn.setPrefWidth(BUTTON_WIDTH);
        exBtn.setOnAction(e -> Platform.exit());

        TilePane tp = new TilePane();
        tp.setAlignment(Pos.CENTER);
        tp.setHgap(10);
        tp.getChildren().addAll(deBtn, exBtn);

        VBox root = new VBox();
        root.setPadding(new Insets(7));
        root.setSpacing(10);
        root.setAlignment(Pos.CENTER);
        root.getChildren().addAll(versionLabel, canvasRef, tp);

        StackPane sp = new StackPane(root);
        BackgroundFill bf = new BackgroundFill(BG_COLOR, CornerRadii.EMPTY, Insets.EMPTY);
        Background bg = new Background(bf);
        sp.setBackground(bg);

        Scene scene = new Scene(sp, 640.0, 480.0);

        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }

}

How to remove the halo of MUI slider thumb when focused?

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.MuiSlider-thumb:hover {
  -webkit-box-shadow: none;
  box-shadow: none;
}    
.Mui-focusVisible {
  -webkit-box-shadow: none!important;
  box-shadow: none!important;
}

See all related Code Snippets

Community Discussions

Trending Discussions on halo

How to use TypeScript to make sure two objects have a same structure (without interface)?
Saving an ID value from an API to a User with GraphQL
Formatting ForEach-Object Output in PS Script
How to grab the ID of an artist so i can insert the album into the database with the artist's ID?
Is there a need or how to write a test on main.pl which is not module and run it using Perl Devel cover
Detect if an image is negative
New programmer having trouble setting up a discord bot in discord.py to return amount of members in a voice channel
Highcharts - Getting a 3d effect with selected pie chart slices
how to parse .proto file into FileDescriptor in golang？
Erasing Antialiased Shapes from a JavaFX Canvas

Trending Discussions on halo

QUESTION

How to use TypeScript to make sure two objects have a same structure (without interface)?

Asked 2022-Apr-15 at 15:19

I'm currently working on a web project which heavily utilizes internationalization (i18n) and I have a hard time figuring out how to make sure all languages share exact same keys.

Here's a simple example of src/lang/en.ts file:

export default {
  title: "My Website Project",
  description: "This is an example of a file which contains phrases and their keys",
  hello: "Hello!",
};

and here's a simple example of src/lang/id.ts file:

export default {
  title: "Proyek Website Saya",
  description: "Ini adalah contoh dari sebuah file yang mengandung beberapa frasa beserta kata kuncinya",
  hello: "Halo!",
};

Now, I want TypeScript to make sure those files have same keys (not more, not less). So if I put cat property into src/lang/id.ts, then:

export default {
  title: "Proyek Website Saya",
  description: "Ini adalah contoh dari sebuah file yang mengandung beberapa frasa beserta kata kuncinya",
  hello: "Halo!",
  cat: "Kucing", // <-- this must be error because "cat" doesn't exist in en.ts file!
};

But I can't build an interface like this

export default interface LanguageStruct {
  title: string,
  description: string,
  hello: string,
};

Because there's hundreds of phrases for each language in the real project and writing those keys one-by-one would be both time consuming and exhausting. I wonder if there's a trick to do with TypeScript for that problem, or at least there's some kind of automation to do that job.

ANSWER

Answered 2022-Apr-15 at 15:19

Use keyof typeof someObject to construct a type from the keys of an object (e.g. the first language strings). Then restrict your other object (the other languages) to have that type as key, and string as value using Record. So the type you're looking for is Record<keyof typeof someObject, string>. Example:

const en = {
  title: "My Website Project",
  description: "This is an example of a file which contains phrases and their keys",
  hello: "Hello!",
};

const de: Record<keyof typeof en, string> = {
  title: "Proyek Website Saya",
  description: "Ini adalah contoh dari sebuah file yang mengandung beberapa frasa beserta kata kuncinya",
  hello: "Halo!",
  cat: "Kucing", // this is highlighted as an error
};

See working example here.

Source https://stackoverflow.com/questions/71885768

QUESTION

Saving an ID value from an API to a User with GraphQL

Asked 2022-Mar-24 at 14:01

I'm working on a video game website where a user can save a game to a list. How this is supposed to work is when the user clicks "Complete Game", the ID of the game is saved to a state that holds the value. The value is then passed into the mutation, then the mutation runs, saving the ID of the game to the users list of completed games. However, all I'm seeing in the console is this:

"GraphQLError: Variable \"$addGame\" got invalid value { gameId: 740, name: \"Halo: Combat Evolved\",

The above error continues, listing the entirety of the API response, instead of just the gameId.

I was able to successfully add the game to the list in the explorer with the following mutation:

    mutation completeGame($addGame: AddNewGame!) {
        completeGame(addGame: $addGame) {
            _id
            completedGameCount
            completedGames {
                gameId
            }
        }
    }

with the following variable:

{
  "addGame": {"gameId": 740}
}

How can I trim down what is being passed into the mutation to just be the gameId?

Below is the entirety of the page, except the return statement at the bottom.

    const [selectedGame, setSelectedGame] = useState([]);

    const [savedGameIds, setSavedGameIds] = useState(getSavedGameIds());

    const [completeGame, { error }] = useMutation(COMPLETE_GAME);

    const { id: gameId } = useParams();

    useEffect(() => {
        return () => saveGameIds(savedGameIds);
    });

    useEffect(() => {

        async function getGameId(gameId) {

            const response = await getSpecificGame(gameId);

            if (!response.ok) {
                throw new Error('Something went wrong...');
            }

            const result = await response.json();

            const gameData = result.map((game) => ({

                gameId: game.id,
                name: game.name,
                cover: game.cover,
                summary: game.summary,
                platforms: game.platforms,
                platformId: game.platforms,
                genres: game.genres,
                genreId: game.genres,
                
            }));

            setSelectedGame(gameData);

        }

        getGameId(gameId);

    }, [])

    const handleCompleteGame = async (gameId) => {
        
        const gameToComplete = selectedGame.find((game) => game.gameId === gameId);

        const token = Auth.loggedIn() ? Auth.getToken() : null;

        if (!token) {
            return false;
        }

        try {
            const { data } = await completeGame({
                variables: { addGame: { ...gameToComplete } },
            });

            console.log(data);

            setSavedGameIds([...savedGameIds, gameToComplete]);
        } catch (err) {
            console.error(err);
        }

    };

With the mutation working in the explorer when I'm able to explicitly define the variable, I am led to believe that the issue is not with the resolver or the typedef, so I'm going to omit those from this post because I don't want it to get too long.

However, I'd be happy to attach any extra code (resolver, typeDef, getSavedGameIds function, etc) if it would allow anyone to assist. The issue (I think) lies in getting my response to match the syntax I used in the explorer, which means trimming down everything except the gameId.

I specifically am extremely suspicious of this line

const gameToComplete = selectedGame.find((game) => game.gameId === gameId)

but I have fiddled around with that for awhile to no avail.

Thank you to anyone who is able to help!

ANSWER

Answered 2022-Mar-24 at 14:01

It sounds like you're trying to pass more into your mutation then your schema is defined to allow. In this part:

const { data } = await completeGame({
  variables: { addGame: { ...gameToComplete } },
});

You're spreading gameToComplete here which means everything in the gameToComplete object is going to be sent as a variable. If your schema is setup to just expect gameId to be passed in, but your error message is showing that name is also being passed in, you just need to adjust your variables to exclude everything you can't accept. Try:

const { data } = await completeGame({
  variables: { addGame: { gameId } },
});

Source https://stackoverflow.com/questions/71595511

QUESTION

Formatting ForEach-Object Output in PS Script

Asked 2022-Mar-05 at 19:32

I'm trying to output data (a list of songs and albums by RUSH) from a CSV file in my PowerShell script, and I got the data sorted the way I need it, but I can't figure out how to format it the way I need. The following is how my code is currently written:

    $output = Import-CSV $DatabasePath -Delimiter "`t" | Sort-Object @{Expression= 'Year'; Descending = $true}, @{Expression='Song'; Ascending=$true}
    #$output
    $output | ForEach-Object {
        Write-Host "$_.Album "($_.Year)" "`n""
        Write-Host "$tab $_.Song"

and this is how it outputs:


         @{Song=The Story so Far; Album=R40 Live; Year=2015; Notes=Drum solo; interlude during Cygnus X-1}.Song
@{Song=Drumbastica; Album=Clockwork Angels Tour; Year=2013; Notes=Drum solo; interlude during Headlong Flight}.Album  2013   

         @{Song=Drumbastica; Album=Clockwork Angels Tour; Year=2013; Notes=Drum solo; interlude during Headlong Flight}.Song 
@{Song=Here It Is!; Album=Clockwork Angels Tour; Year=2013; Notes=Drum solo}.Album  2013

         @{Song=Here It Is!; Album=Clockwork Angels Tour; Year=2013; Notes=Drum solo}.Song
@{Song=Peke's Repose; Album=Clockwork Angels Tour; Year=2013; Notes=Guitar solo; lead-in to Halo Effect}.Album  2013

I need the output to display like this:

R40 Live (2015)
    The Story so Far
Clockwork Angels Tour (2013)
    Drumbastica
    Here It Is!
    Peke's Repose
    The Percussor
Clockwork Angels (2012)
    BU2B
...

(NOTE: please ignore the color in the example above.) What I'm trying to do after getting the data from the CSV file with the loop is to display the Album name with the Year in paratheses on the first line, then all the songs pertaining to that album tabbed in and in alphabetical order on the lines following the album name. How can I do this?

Edit: Following @BrettFord1999 Suggestions, I got the output to display like this:

R40 Live (2015)  
         The Story so Far
Clockwork Angels Tour (2013)
         Drumbastica
Clockwork Angels Tour (2013)
         Here It Is!
Clockwork Angels Tour (2013)
         Peke's Repose
Clockwork Angels Tour (2013)
         The Percussor
Clockwork Angels (2012)
         BU2B

However, I only want to display the Album once and not multiple times. Is there a way to display each album name once instead of with every song it's linked to?

I would provide the original file except I can't figure out how to share it on here. I'm still new to StackOverflow.

ANSWER

Answered 2022-Mar-01 at 04:22

I would first try setting the values to a variable then manipulating it for your output.

If you could provide a copy of the CSV I could take a further look.

  $output = Import-CSV $DatabasePath -Delimiter "`t" | Sort-Object @{Expression= 'Year'; Descending = $true}, @{Expression='Song'; Ascending=$true}
    #$output
    $output | ForEach-Object {
        $album = $_.Album
        $year = $_.Year
        $year = $_.Song

        Write-Host "$Album ($Year)"
        etc...
        }

Source https://stackoverflow.com/questions/71303177

QUESTION

How to grab the ID of an artist so i can insert the album into the database with the artist's ID?

Asked 2022-Feb-22 at 17:52

Here is my schema:

CREATE TABLE artists 
(
    id serial PRIMARY KEY,
    name varchar(40) NOT NULL UNIQUE
);

CREATE TABLE albums 
(
    id serial PRIMARY KEY,
    name varchar(40) NOT NULL,
    artist integer NOT NULL,
    FOREIGN KEY(artist) REFERENCES artists(id)
);

CREATE TABLE songs 
(
    id serial PRIMARY KEY,
    name varchar(40) NOT NULL,
    album integer NOT NULL,
    FOREIGN KEY(album) REFERENCES albums(id)
);

This is what I'm doing:

INSERT INTO artists (name) 
VALUES ('Dio') ON CONFLICT DO NOTHING;
INSERT INTO artists (name) 
VALUES ('Amorphis') ON CONFLICT DO NOTHING;

SELECT id FROM artists WHERE name = 'Dio';
SELECT id FROM artists WHERE name = 'Amorphis';
   
INSERT INTO albums (name, artist) VALUES ('Holy Diver', 1) ON CONFLICT DO NOTHING;
INSERT INTO albums (name, artist) VALUES ('Dream Evil', 1) ON CONFLICT DO NOTHING;
INSERT INTO albums (name, artist) VALUES ('Halo', 2) ON CONFLICT DO NOTHING;

Right now I'm inserting into albums by looking at the table for the artist ID and typing manually. How can I do this automatically?

My application will receive the song title, artist name and album name. So it will need to look for the artist ID if the artist exists and if not, create the artist, then grab the ID of said artist and put into the INSERT INTO albums statement.

ANSWER

Answered 2022-Feb-22 at 17:47

One way:

INSERT INTO albums (name, artist) 
SELECT 'Holy Diver' AS album_name, id AS artist 
FROM artists 
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

Another way to do multiple albums from the same artist at once. You can just list them in the VALUES definition.

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (
      VALUES ('Holy Diver'),
             ('Dream Evil')
     ) t(album_name)
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

And another way for good measure:

INSERT INTO albums (name, artist) 
SELECT album_name, id AS artist 
FROM artists,
     (SELECT 'Holy Diver' AS album_name
      UNION
      SELECT 'Dream Evil') t
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

And another way:

INSERT INTO albums (name, artist) 
SELECT UNNEST(ARRAY['Holy Diver','Dream Evil']) AS album_name,
       id AS artist 
FROM artists
WHERE name = 'Dio'
ON CONFLICT DO NOTHING;

Ok, I'll stop.

Source https://stackoverflow.com/questions/71225742

QUESTION

Detect if an image is negative

Asked 2022-Feb-06 at 11:05

I'm trying to clean some chest X-ray data to feed to a CNN. In my dataset are currently many images where the bones are shown in white (higher pixel value than the background), like so:

While others show the bones in a darker color than the background, like this:

Can you show me a way to label the two? I have no other external info about the image, though it can be assumed they are the same size (

Assuming they have the same size (about 1000x2000) and that the first row of pixels has more than 1 different values (i.e. is not a blank border), I've written this simple code to compare a middle-ish pixel to the top-left one (likely to be part of the background).

if img[0,0] > img[500, 500]: # if background lighter than center
        img = 255 - img # make the image negative

As you can see even from these samples I posted, this comparison is not always a good indicator (sometimes there is a halo round the background or pixel in [500,500] can be similar to background). Is there some more reliable other way to detect if an image of this kind is negative or not?

Consider that in the dataset are some images with very few details and shading, such as

ANSWER

Answered 2022-Feb-05 at 03:23

A possible solution involves equalizing the input image, then just thresholding applying a fixed threshold value. We can estimate the number of white pixels and compare against a threshold to decide if a correction needs to be applied.

Let's see the code:

# Imports:
import numpy as np
import cv2

# Image path
path = "D://opencvImages//"
fileName = "RPWBn.png"

# Reading an image in default mode:
inputImage = cv2.imread(path + fileName)

# Convert RGB to grayscale:
originalGrayscale = cv2.cvtColor(inputImage, cv2.COLOR_BGR2GRAY)

# Equalize histogram
grayscaleImage = cv2.equalizeHist(originalGrayscale)

# It might be interesting to you to check out the image equalization:
cv2.imshow("Image Equalized", grayscaleImage)
cv2.waitKey(0)

# Binarize the image with a fixed threshold:
minThresh = 128
_, binaryImage = cv2.threshold(grayscaleImage, minThresh, 255, cv2.THRESH_BINARY)

# Compute the percent of white pixels:
(imageHeight, imageWidth) = binaryImage .shape[:2]
whitePercent = cv2.countNonZero(binaryImage)/(imageHeight * imageWidth)

Then, we check this value against a threshold, to see if we must apply the correction. You have the option to correct the original image and the equalized one:

if whitePercent > 0.5:
    print("Correcting images...")
    # Correct the original (unequalized) image:
    originalGrayscale = 255 - originalGrayscale
    cv2.imshow("Correction - Original Image", originalGrayscale)

    # Correct the equalized image:
    grayscaleImage = 255 - grayscaleImage
    cv2.imshow("Correction - Equalized Image", grayscaleImage )
    cv2.waitKey(0)

The second image is corrected. Here are the images for both possible results:

Original inverted:

Equalized inverted:

Now, in addition to the image inversion, you might need to do some additional post-processing to improve the brightness and contrast of the original. We can achieve this using the CLAHE method. Let's post-process the original, unequalized image:

    # Improve the brightness + contrast of the original image via 
    # CLAHE. 
    # Gray to BGR conversion:
    originalGrayscale = cv2.cvtColor(originalGrayscale , cv2.COLOR_GRAY2BGR)

    # Conversion to LAB:
    lab = cv2.cvtColor(originalGrayscale, cv2.COLOR_BGR2LAB)

    # Split the channels:
    l, a, b = cv2.split(lab)

    # Apply CLAHE to L-channel:
    # You might need to fiddle with the parameters:
    clahe = cv2.createCLAHE(clipLimit=7.0, tileGridSize=(1, 1))
    cl = clahe.apply(l)

    # Merge the CLAHE enhanced L-channel with the a and b channel:
    limg = cv2.merge((cl, a, b))

    # Conversion from LAB to BGR:
    final = cv2.cvtColor(limg, cv2.COLOR_LAB2BGR)
    cv2.imshow("Original Corrected and Enhanced", final)
    cv2.waitKey(0)

This is the enhanced image:

Source https://stackoverflow.com/questions/70993502

QUESTION

New programmer having trouble setting up a discord bot in discord.py to return amount of members in a voice channel

Asked 2022-Jan-19 at 02:55

I am a new developer and have been trying to make a discord bot that would react to a discord command to see how many people are in the voice channel that the command came from(the author) and then it would pick a random game from a list depending on the amount of people in it. I have deleted and rewrote a bunch of stuff and I am very confused. Thank you so much for your time I am very lost on how to set up the functions.

I am using replit

import discord
import os
import requests
import json
import random


client = discord.Client()

game_list = ["League of Legends", "Valorant", "Valheim", "Apex Legends", "Tarkov", "Age of Empires", "Halo", "CSGO", "Seige" ]

print(random.choice(game_list))

def get_game():
  return(random.choice(game_list))



@client.event
async def on_ready():
  print('We have logged in as {0.user}'.format(client))

@client.event
async def on_message(message):
  if message.author == client.user:
    return
 
  voice_channel = message.author.voice.channel

  msg = message.content
  
  def game_plz():
    return(voice_channel.members())
  
  if msg.startswith('!game'):
    await message.channel.send(get_game())

  if msg.startswith('!plz'):
    await message.channel.send(game_plz())




#@client.event

#async def 
#channel = client.get_channel()
#members = channel.members()
#memids = []
#for member in members:
#  meids.append(member.id)
#print(meids)

client.run(os.environ['token'])

ANSWER

Answered 2022-Jan-19 at 02:55

Since discord.VoiceChannel.members is a list of discord.Member objects, you can check how many of these are within the list by using len. Do also take note that channel.members is not a function on its own, and you do not need to include the (). Do view the revised code snippet below, as well as any further explanations.

# I'm suggest putting this outside of the on_message event
def game_plz(channel:discord.VoiceChannel):
    members = channel.members #finds members connected to the channel
    # channel.members is a list of discord.Member objects
    return len(members) # returns amount of members in the channel

# within your on_message event
    voice_channel = message.author.voice.channel
    msg = message.content

    if msg.startswith('!plz'):
        await message.channel.send(game_plz(voice_channel))
        # pass voice_channel as an argument into game_plz
        # voice_channel should be a discord.VoiceChannel object

Other Links:

Getting a list of all of the members in a specific voice channel - Stackoverflow
Retrieve list of members in channel - Stackoverflow
INTENTS Print the list of members in a voice channel - Stackoverflow

Source https://stackoverflow.com/questions/70763982

QUESTION

Highcharts - Getting a 3d effect with selected pie chart slices

Asked 2022-Jan-11 at 15:21

In highcharts, I'm trying to make so that when the user selects or hover over a slice of a pie chart, the slice makes the effect of getting up in the z axis (towards the user). I'm trying to accomplish this by setting a shadow filter through css and making the border of the slice wider (with the same color of the fill). However, the issue I face is that the slices can still be below other slices, so the selected slice and its shadow will go behind those slices thus still seeming to be under them. To further illustrate:

Since red was added last, it looks good when selected - it's above the other pie slices.

However, blue gets stuck behind the other slices when selected, because it was first in the array.

I know SVG will stack elements after their order in the DOM and not with a css property such as z-index, so one idea was to remove the selected point and then appending it again. This rearranges the whole pie however, so it's not an alternative.

Is there any other solution for this I'm not thinking of?

document.addEventListener('DOMContentLoaded', function() {
  const chart = Highcharts.chart('container', getChartOptions())
})

/** 
 * Gets the highchart options for the pie chart.
 * Each data point has event handlers added to them 
 * To set the correct border widths
 */
function getChartOptions() {
  return {
    series: [{
      type: 'pie',
      innerSize: '80%',
      allowPointSelect: true,
      slicedOffset: 0,
      states: {
        // Remove default hover settings
        hover: {
          halo: null,
          brightness: 0,
        },
      },
      data: getMockData()
    }],
  };
}

/** 
 * Generates mock data for highcharts
 * Each data point has event handlers set up in the `events` property
 */
function getMockData() {
  return [{
      color: '#aaf',
      borderColor: '#aaf',
      y: 4,
      events: getEventHandlers(),
    },
    {
      color: '#afa',
      borderColor: '#afa',
      y: 3,
      events: getEventHandlers(),
    },
    {
      color: '#faa',
      borderColor: '#faa',
      y: 8,
      events: getEventHandlers(),
    },
  ]
}

/** 
 * Event handlers for highchart data points. 
 * The border width of the slice is set to 20 for `select` and `mouseOver`
 * The border width of the slice is set to 0 for `unselect` and `mouseOut` (except when the event is selected, in which case `mouseOut` shouldn't do anything)
 */
function getEventHandlers() {
  return {
    select: (obj) => {
      obj.target.update({
        borderWidth: 20
      });
    },
    unselect: (obj) => {
      obj.target.update({
        borderWidth: 0
      });
    },
    mouseOver: (obj) => {
      obj.target.update({
        borderWidth: 20
      });
    },
    mouseOut: (obj) => {
      if (!obj.target['selected']) {
        obj.target.update({
          borderWidth: 0
        });
      }
    },
  };
}

/* A drop shadow is the effect I want to accomplish, but it should be above the other slices. */
.highcharts-pie-series .highcharts-point-hover,
.highcharts-pie-series .highcharts-point-select {
  filter: drop-shadow(0 0 10px black);
}

<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container" style="width:100%; height:400px;"></div>

ANSWER

Answered 2022-Jan-10 at 09:11

To achieve extra border when you hovering you can trigger to the point.events and add SVG attributes.

  plotOptions: {
    pie: {
      type: 'pie',
      innerSize: '80%',
      allowPointSelect: true,
      slicedOffset: 0,
      states: {
        hover: {
          halo: null,
          brightness: 0,
        },
      },
      point: {
        events: {
          mouseOver: (obj) => {
            obj.target.graphic.attr({
                'stroke-width': 50,
                stroke: obj.target.color,
                zIndex: 3,
                filter: 'drop-shadow(0 0 10px black)'
              }).css({
                borderRadius: 20
              })
              .add();
          },
          mouseOut: (obj) => {
            obj.target.graphic.attr({
                'stroke-width': 1,
                stroke: obj.target.color,
                filter: 'transparent'
              }).css({
                borderRadius: 0
              })
              .add();
          },
        }
      }

    }
  },

Live demo:

https://jsfiddle.net/BlackLabel/u4ypbsrk/

API References:

https://api.highcharts.com/class-reference/Highcharts.SVGElement#attr,

https://api.highcharts.com/class-reference/Highcharts.CSSObject,

https://api.highcharts.com/highcharts/plotOptions.pie.point.events

Source https://stackoverflow.com/questions/70623317

QUESTION

Erasing Antialiased Shapes from a JavaFX Canvas

Asked 2022-Jan-08 at 18:42

I have inherited a simulation program to extend with new features. The original was written as an Applet using the AWT library for graphics. Before adding the new features I want to adapt the program to the desktop and use JavaFX instead of AWT.

The simulation paints hundreds or thousands of objects dozens of times per second, then erases them and repaints them at new locations, effectively animating them. I am using a Canvas object for that part of the UI. Erasing is done by repainting the object with the background color. What I am seeing though is that erasing objects is incomplete. A kind of "halo" gets left behind though.

The following program illustrates the problem. Clicking the "Draw" button causes it to draw a few hundred circles on the Canvas using the foreground color. After drawing, clicking the button again will erase the circles by re-drawing them in the background color. Multiple cycles of draw/erase will build up a visible background of "ghost" images.

package com.clartaq.antialiasingghosts;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

import java.util.Random;

public class Main extends Application {

    static final int NUM_CIRCLES = 500;
    static final int CIRCLE_DIAMETER = 10;
    static final double PANEL_WIDTH = 75.0;
    static final double PANEL_HEIGHT = 40.0;
    static final Color FG_COLOR = Color.rgb(10, 0, 200);
    static final Color BG_COLOR = Color.rgb(255, 255, 255);
    static final double BUTTON_WIDTH = 50.0;

    GraphicsContext gc;

    Random rand = new Random();

    double[] px = new double[NUM_CIRCLES];
    double[] py = new double[NUM_CIRCLES];

    void randomizeParticlePositions() {
        for (int i = 0; i < NUM_CIRCLES; i++) {
            px[i] = rand.nextDouble() * PANEL_WIDTH;
            py[i] = rand.nextDouble() * PANEL_HEIGHT;
        }
    }

    void drawCircles(Color color) {
        gc.setFill(color);
        for (int i = 0; i < NUM_CIRCLES; i++) {
            var screenX = px[i] * CIRCLE_DIAMETER;
            var screenY = py[i] * CIRCLE_DIAMETER;
            gc.fillOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
        }
    }

    @Override
    public void start(Stage stage) {
        String javaVersion   = System.getProperty("java.version");
        String javafxVersion = System.getProperty("javafx.version");

        stage.setTitle("AntiAliasingGhosts -- erasing objects leaves ghosts in JavaFX");

        Label versionLabel = new Label("JavaFX " + javafxVersion
                + ", running on Java " + javaVersion + ".");

        double canvasWidth  = (PANEL_WIDTH * CIRCLE_DIAMETER);
        double canvasHeight = (PANEL_HEIGHT * CIRCLE_DIAMETER);
        Canvas canvasRef    = new Canvas(canvasWidth, canvasHeight);
        gc = canvasRef.getGraphicsContext2D();

        Button deBtn = new Button("Draw");
        deBtn.setPrefWidth(BUTTON_WIDTH);
        deBtn.setOnAction(e -> {
            String txt = deBtn.getText();
            switch (txt) {
                case "Draw" -> {
                    randomizeParticlePositions();
                    drawCircles(FG_COLOR);
                    deBtn.setText("Erase");
                }
                case "Erase" -> {
                    drawCircles(BG_COLOR);
                    deBtn.setText("Draw");
                }
                default -> Platform.exit();
            }
        });

        Button exBtn = new Button("Exit");
        exBtn.setPrefWidth(BUTTON_WIDTH);
        exBtn.setOnAction(e -> Platform.exit());

        TilePane tp = new TilePane();
        tp.setAlignment(Pos.CENTER);
        tp.setHgap(10);
        tp.getChildren().addAll(deBtn, exBtn);

        VBox root = new VBox();
        root.setPadding(new Insets(7));
        root.setSpacing(10);
        root.setAlignment(Pos.CENTER);
        root.getChildren().addAll(versionLabel, canvasRef, tp);

        StackPane      sp = new StackPane(root);
        BackgroundFill bf = new BackgroundFill(BG_COLOR, CornerRadii.EMPTY, Insets.EMPTY);
        Background     bg = new Background(bf);
        sp.setBackground(bg);

        Scene scene = new Scene(sp, 640.0, 480.0);

        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }

}

I can get good erasure by expanding the diameter of the circles by 2 pixels when erasing. Of course, that can affect nearby shapes too.

Also, using the fillRect method to erase the entire Canvas seems reasonable, but that means everything has to be re-drawn if anything has to be re-drawn. I suppose it is possible to optimize the re-draw by erasing and re-drawing a smaller section of the Canvas but I don't want to do that if it isn't necessary.

Magnifying sections of the program display shows that it is really an antialiasing effect. Constructing the Scene with the SceneAntialiasing.DISABLED parameter does not seem to have any effect.

Attempting to turn off image smoothing as suggested in this question does not help.

Is possible to erase a single shape drawn on a Canvas by re-drawing it in the background color?

I am using Java 17.0.1, JavaFX 17.0.1, and a 5K Mac display if that is relevant.

ANSWER

Answered 2022-Jan-08 at 18:42

For expedience, note the difference between fillOval and strokeOval() in the GraphicsContext. You can conditionally erase the outline in drawCircles() as a function of a suitable boolean value:

if (stroke) {
    gc.setStroke(BG_COLOR);
    gc.strokeOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
}

Try a few representative shapes, e.g. fillRect, to verify the desired result.

A better alternative, IMO, is to pursue the erase -> render strategy. Complete examples seen here and here may help you establish whether the approach is scalable to your use-case. See also this related examination of resampling artifact.

Expedient approach, as tested:

import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

import java.util.Random;

public class Main extends Application {

    static final int NUM_CIRCLES = 500;
    static final int CIRCLE_DIAMETER = 10;
    static final double PANEL_WIDTH = 75.0;
    static final double PANEL_HEIGHT = 40.0;
    static final Color FG_COLOR = Color.rgb(10, 0, 200);
    static final Color BG_COLOR = Color.rgb(255, 255, 255);
    static final double BUTTON_WIDTH = 50.0;

    GraphicsContext gc;

    Random rand = new Random();
    private boolean stroke;

    double[] px = new double[NUM_CIRCLES];
    double[] py = new double[NUM_CIRCLES];

    void randomizeParticlePositions() {
        for (int i = 0; i < NUM_CIRCLES; i++) {
            px[i] = rand.nextDouble() * PANEL_WIDTH;
            py[i] = rand.nextDouble() * PANEL_HEIGHT;
        }
    }

    void drawCircles(Color color) {
        gc.setFill(color);
        for (int i = 0; i < NUM_CIRCLES; i++) {
            var screenX = px[i] * CIRCLE_DIAMETER;
            var screenY = py[i] * CIRCLE_DIAMETER;
            gc.fillOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
            if (stroke) {
                gc.setStroke(BG_COLOR);
                gc.strokeOval(screenX, screenY, CIRCLE_DIAMETER, CIRCLE_DIAMETER);
            }
        }
    }

    @Override
    public void start(Stage stage) {
        String javaVersion = System.getProperty("java.version");
        String javafxVersion = System.getProperty("javafx.version");

        stage.setTitle("AntiAliasingGhosts -- erasing objects leaves ghosts in JavaFX");

        Label versionLabel = new Label("JavaFX " + javafxVersion
            + ", running on Java " + javaVersion + ".");

        double canvasWidth = (PANEL_WIDTH * CIRCLE_DIAMETER);
        double canvasHeight = (PANEL_HEIGHT * CIRCLE_DIAMETER);
        Canvas canvasRef = new Canvas(canvasWidth, canvasHeight);
        gc = canvasRef.getGraphicsContext2D();

        Button deBtn = new Button("Draw");
        deBtn.setPrefWidth(BUTTON_WIDTH);
        deBtn.setOnAction(e -> {
            String txt = deBtn.getText();
            switch (txt) {
                case "Draw" -> {
                    randomizeParticlePositions();
                    drawCircles(FG_COLOR);
                    deBtn.setText("Erase");
                    stroke = true;
                }
                case "Erase" -> {
                    drawCircles(BG_COLOR);
                    deBtn.setText("Draw");
                    stroke = false;
                }
                default ->
                    Platform.exit();
            }
        });

        Button exBtn = new Button("Exit");
        exBtn.setPrefWidth(BUTTON_WIDTH);
        exBtn.setOnAction(e -> Platform.exit());

        TilePane tp = new TilePane();
        tp.setAlignment(Pos.CENTER);
        tp.setHgap(10);
        tp.getChildren().addAll(deBtn, exBtn);

        VBox root = new VBox();
        root.setPadding(new Insets(7));
        root.setSpacing(10);
        root.setAlignment(Pos.CENTER);
        root.getChildren().addAll(versionLabel, canvasRef, tp);

        StackPane sp = new StackPane(root);
        BackgroundFill bf = new BackgroundFill(BG_COLOR, CornerRadii.EMPTY, Insets.EMPTY);
        Background bg = new Background(bf);
        sp.setBackground(bg);

        Scene scene = new Scene(sp, 640.0, 480.0);

        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }

}

Source https://stackoverflow.com/questions/70634272

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