ListModel | 用于 QML 项目的 C 列表模型

 by   qtdevs C++ Version: Current License: MIT

kandi X-RAY | ListModel Summary

kandi X-RAY | ListModel Summary

ListModel is a C++ library. ListModel has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

用于 QML 项目的 C++ 列表模型
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            kandi-support Support

              ListModel has a low active ecosystem.
              It has 6 star(s) with 1 fork(s). There are no watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              ListModel has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of ListModel is current.

            kandi-Quality Quality

              ListModel has no bugs reported.

            kandi-Security Security

              ListModel has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              ListModel is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              ListModel releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            ListModel Key Features

            No Key Features are available at this moment for ListModel.

            ListModel Examples and Code Snippets

            No Code Snippets are available at this moment for ListModel.

            Community Discussions

            QUESTION

            How to create Undo/Redo operations in Qt3D?
            Asked 2021-Jun-13 at 22:49

            I created some entities using qt3d in QML. For example, this code shows a Scene3D element that declares RootEntity which is another QML element that contains the scene graph:

            ...

            ANSWER

            Answered 2021-Jun-13 at 17:22

            One approach is to maintain a global list of Qt.vector3d elements and use it to record the position of the spheres that are removed with the "Undo" operation:

            • When the user hits CTRL+Z, create a new Qt.vector3d object to store the position of the last sphere rendered (that is, the one that was last appended to entityModel) and add that position to the global list of 3d vectors;
            • Then, to remove a sphere from the screen, call entityModel.remove() with the index of the sphere that needs to be erased;

            The "Redo" operation simply does the opposite:

            • When the user hits CTRL+Y, the last element of the global list of 3d vectors holds the location of the lastest sphere removed: append this position to entityModel so the sphere can be rendered again;
            • Then, remember to erase this position from the global list so the next Undo operation can render a different sphere;

            RootEntity.qml:

            Source https://stackoverflow.com/questions/67956066

            QUESTION

            Decrease time until onPressAndHold is emitted on ItemDelegate
            Asked 2021-Jun-02 at 11:37

            I have the following example Qt Quick application:

            ...

            ANSWER

            Answered 2021-Jun-02 at 11:37

            The interval is established through the mousePressAndHoldInterval() of QStyleHints, in this case the solution is to use the setter that seems to be undocumented.

            Source https://stackoverflow.com/questions/67804211

            QUESTION

            Change color of SwipeDelegate when pressed
            Asked 2021-Jun-02 at 08:03

            I have a simple Qt Quick application containing a ListView with a few SwipeDelegates.

            ...

            ANSWER

            Answered 2021-Jun-02 at 08:03

            If it's a style that supports palettes, you can set the relevant palette role. For the Default style ("Basic" in Qt 6), it assigns its background colour like so:

            Source https://stackoverflow.com/questions/67800159

            QUESTION

            Automate placing a jTextField next to an ImageIcon
            Asked 2021-May-30 at 10:24

            I'd like to automate putting a jTextField next to an ImageIcon on the same row basically, for as many rows as I'd like.

            I need to do this process depending on how many images I provided as input that's why a manual solution doesn't work for me.

            This is an example of what I'd like it to look like. As you can see, an image with a text field next to it for as many rows as I need:

            i am working with Java Swing

            here is what i tried now in this exemple :

            ...

            ANSWER

            Answered 2021-May-30 at 00:01
            Introduction

            Here's the GUI I came up with.

            To use this GUI, you would select the first row that you want to correct with the mouse, and type the corrected text into the row.

            Press the Enter key to put your cursor on the next row. You can skip a row by pressing the Enter key without typing anything.

            When you've made all the corrections, left-click on the Save Corrections button.

            Explanation

            When I create a Swing GUI, I use the model / view / controller (MVC) pattern. This pattern allows me to separate my concerns and focus on one part of the GUI at a time.

            Using Java Swing, the MVC pattern is implemented this way:

            1. The view reads information from the model.
            2. The view does not update the model.
            3. The controller updates the model and repaints / revalidates the view.

            There's usually not one controller class to "rule them all". Each ActionListener acts as an independent controller.

            For this project, I created two model classes, a view class, a JTable cell renderer class, and one controller class.

            Model

            I created two model classes. The ImageText class holds an OCR image, the OCR text, and the corrected text. This keeps the corrections separate and allows easier verification of the correctness of the code.

            The ImageTextModel class holds a java.util.List of ImageText instances. Since you didn't provide any OCR image examples, I created some from the text. This is where you would read the OCR images and the OCR text and put the values into the List.

            View

            I started the Swing application with a call to the SwingUtilities invokeLater method. This method ensures that all Swing components are created and executed on the Event Dispatch Thread.

            I created one JFrame and two JPanels. The JFrame methods must be executed in a specific order. This is the order I use for all my Swing applications.

            The upper JPanel holds the JTable. The lower JPanel holds the JButton. The ImageCellRenderer class allows me to display the BufferedImage in the JTable.

            I use Swing layout managers to create the JPanels and pack the JFrame. This allows the layout managers to place the Swing components and make the JFrame as small as possible.

            Controller

            The ButtonListener class prints the corrected text. Here's where you would write the corrected OCR text to your file system.

            Code

            Here's the complete runnable code. I made all the classes inner classes so I could post the code as one block.

            Source https://stackoverflow.com/questions/67664298

            QUESTION

            If there are two and more stickers in one column, not every sticker you click responds to it, showing the JToolBar with buttons
            Asked 2021-May-16 at 07:49

            I'm trying to write a kanban board. But if there are two and more stickers in one column, often the JToolBar with buttons will be shown only if you click on a sticker in this column for the firs time. I thought that there were some problems with coordinates, but I didn't found it. The StickerListener responds th event, even prints "условие работает" if coordinates are correct, but the JToolBar remainds invisible.

            ...

            ANSWER

            Answered 2021-May-16 at 07:49

            The problem is in the control flow of the StickerListener.mouseClicked(): you search the stickers to find the one that has been clicked.

            Due to the if / else you reset the toolbar for every sticker that has not been clicked, meaning that your code only works if you clicked on the last sticker (in order of iteration).

            Your code will work if you move the code from the else part before the loop (so that it executes only once):

            Source https://stackoverflow.com/questions/67553791

            QUESTION

            Sorting a List Model in descending order Java
            Asked 2021-May-14 at 08:11

            I'm trying to sort a list model by splitting a string comparing the id's i have assigned to any given index and comparing it to another index, it works the first time I press the button however, if I press the button again it moves two indexes out of order.

            Any help would be appreciated, if you need anything from me - please ask

            An example of the string I'm splitting:

            DRAMA,Harry Potter,2,5698750,J.K Rowling,500,08/12/2004,Lyle,0,0

            The code that is giving me trouble

            ...

            ANSWER

            Answered 2021-May-14 at 08:11

            One problem with that solution:
            testing if compareTo returns a positive value, no matter if x is smaller or greater than y.
            Example, suppose we only have 2 ids ordered like ["2", "1"] - if x=0, y=1 "2".compareTo("1") will return >0 so both values are swapped resulting in ["1", "2"].
            Some iterations later, x=1, y=0 so id[x]=="2", id[y]=="1", comparing ("2".compareTo("1")) will again return >0 and the values will be swapped again.

            Solution: y should always be greater (or always smaller) than x (e.g. for (int y = x + 1; ...)

            Using a debugger and executing step-by-step should help seeing what is happening...

            Source https://stackoverflow.com/questions/67530369

            QUESTION

            Core Data - Data Transfer SwiftUI
            Asked 2021-May-07 at 12:35

            I am trying to transfer CDListModel to my Today View but I can not do it properly. So that I can see how many reminders I have totally today in list.reminders.count. Right now I am getting 0

            ...

            ANSWER

            Answered 2021-May-07 at 12:35

            You do not need to transfer data from another view to Today view. Because the data you need is already inside the core data so you can reach to data using

            Source https://stackoverflow.com/questions/67434080

            QUESTION

            Dynamic MapQuickItem creation on Qt with QML
            Asked 2021-May-06 at 06:28

            My aim is to show distance of plane to the coordinate as an item on the Map. Even tough I am able to display custom Rectangle components, I am having trouble to display MapQuickItem. I do not know where the problem is?

            Edit: I think there is no problem on Box.qml. Please omit the property values that I did not passed to the component.

            Box.qml

            ...

            ANSWER

            Answered 2021-May-06 at 06:28

            Since the Box.qml file is local then it is not necessary to use the statusChanged so that simplifies the logic to:

            distanceBoxCreation.js

            Source https://stackoverflow.com/questions/67403008

            QUESTION

            Observable Object to CoreData - Value of type 'NSSet?' has no subscripts
            Asked 2021-May-03 at 14:39

            This was my ModelsConfig

            ...

            ANSWER

            Answered 2021-May-03 at 14:39

            In Core Data relationships are (NS)Sets. For performance reasons they are unordered.

            The easiest solution is to convert the set to an array

            Source https://stackoverflow.com/questions/67370034

            QUESTION

            JList repaint single element
            Asked 2021-May-01 at 15:57

            I've got a JList whose elements consist of image files for which I'm creating thumbnails (in a background Thread). When these thumbnails become available, I'd like to force a repaint of just that item. However, I find that when I use the listModel's fireDataChanged method (see below), all the visible items in the list are repainted (using my custom ListCellRenderer).

            ...

            ANSWER

            Answered 2021-May-01 at 02:10

            Without some kind of runnable example which demonstrates your issue, it's impossible to make any concrete recommendations.

            The following simple example makes use of a SwingWorker to change the value of the elements within the ListModel. To make it look more realistic, I've shuffled the List of indices and applied a short delay between each.

            Source https://stackoverflow.com/questions/67341415

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install ListModel

            You can download it from GitHub.

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