[Interest] MouseArea failed to handle onPositionChanged to a frameless ApplicationWindow in Qt 5.2.1

[Leslie Zhai]

Hi Rutledge,

Thanks for your reply :)

It is might be the WINDOW MANAGER issue, for example, KWin (the KDE`s) 
is not able to handle QML frameless Window correctly, when you drag the 
window title over the borders (for example, over the top of screen)

Regards,
Leslie Zhai <xiang.zhai at i-soft.com.cn>

> On 7 May 2014, at 4:50 AM, Leslie Zhai wrote:
>
>> Hi qt developers,
>>
>> I use MouseArea to act like DragArea to move the frameless
>> ApplicationWindow in Qt5.2.1
>> https://github.com/AOSC-Dev/QJade/blob/master/qml/DragArea.qml#L17
>>
>> But Window Cannot Be Moved Over the Borders the Screen
>> https://github.com/AOSC-Dev/QJade/issues/5
>>
>> Please someone show me how to fix it, thanks a lot!
> I was testing that a couple of years ago, as follows:
>
> import QtQuick 2.1
> import QtQuick.Window 2.0
>
> Window {
>      id: window
>      visible: true
>      width: 100
>      height: 100
>      flags: Qt.FramelessWindowHint
>
>      Rectangle {
>          color: "steelblue"
>          anchors.top: parent.top
>          width: parent.width
>          height: 20
>          MouseArea {
>              anchors.fill: parent
>              property real lastMouseX: 0
>              property real lastMouseY: 0
>              onPressed: {
>                  lastMouseX = mouseX
>                  lastMouseY = mouseY
>              }
>              onMouseXChanged: window.x += (mouseX - lastMouseX)
>              onMouseYChanged: window.y += (mouseY - lastMouseY)
>          }
>      }
> }
>
> I can drag this across both monitors on a dual-head system, either OSX or Linux; and if I wrap your code into a standalone test, it also works:
>
> import QtQuick 2.2
> import QtQuick.Window 2.1
>
> Window {
>      id: rootWindow
>      visible: true
>      width: 100
>      height: 100
>      MouseArea {
>          cursorShape: Qt.ArrowCursor
>          anchors.fill: parent
>
>          property variant clickPos: "1, 1"
>
>          onPressed: {
>              cursorShape = Qt.SizeAllCursor
>              clickPos = Qt.point(mouse.x, mouse.y)
>          }
>
>          onPositionChanged: {
>              var delta = Qt.point(mouse.x - clickPos.x, mouse.y - clickPos.y)
>              rootWindow.x += delta.x
>              rootWindow.y += delta.y
>          }
>
>          onExited: cursorShape = Qt.ArrowCursor
>      }
> }
>