splitview | Let a user resize a pair of adjacent views | Frontend Framework library

I have TestApp, where I have SplitView with 2 horizontal Containers. By clicking button in the first container on the left(blue) I want to show new page (DetailPage widget) but not all over the page, but only in the first Container. Now it shows on the whole screen. What is a best approach to do it?

I am making an app that features texting. I want the text messages to be added to the column layout from the bottom to the top like a regular texting app. Where if there are only a few messages or a single message, they appear at the bottom of the view rather than the top. Right now, messages get added from top to bottom and I cannot figure out how to get it to appear the way I want. Here is currently how it looks with my code:

and here is my code:

I am new to QML and I am trying to implement a horizontal splitview with 2 children. The problem that I am having is that despite setting maximum and minimum widths for the children, the last child always takes up the entire split view and all the others are hidden and have to be manually opened. I have tried defining minimum and maximum widths using Layout.maximum/minimumwidth (which dont work at all) and have tried using fillwidth on the first child of the splitview. Nothing seems to work. I even copied and pasted the code from the qml doc page from splitview and it did the same thing. Here is my code:

I'm using SplitView Component inside another component, but styles - --cx-active-view:2; --cx-view-position:0; are not getting applied on cx-split-view and cx-view. Below are the code snippets for the same -

I have a QtQuick Controls 1.3 SplitView(as I am on QT 5.11), which contains 3 rectangles in vertical orientation. It displays fine, and I can drag-resize the childs as intended.

Now I want to add a button which allows the user to completely hide the bottom most rectangle, effectively collapsing it. However, nothing I am trying to resize the rect works:

I am using SplitView in Qml (QtQuick.Controls 1.4), and I have divided my window in three sections. The width and height of each section is defined using percentages of the size of the full window. Example:

I am trying to make a smooth transition from a closed panel to an open panel and vice versa.

But I don't know how to do it ((

I have an element

I am developing a macOS application, and I have a subclassed NSSplitView that I sometime completely disable by reducing its alphaValue, as the following happens in the subclass:

I'm trying to replace my StackPanel with ListView in order to have ItemClick function available.
However, I found out that When I switched from StackPanel to ListView, the Item is not in center anymore.

Before (StackPanel):

After (ListView):

Here is the code: