QtQuick2 dragging frameless window

问题:

I’m looking for a way of dragging frameless window in QtQuick2. I fallowed this thread on the forum Link but it giving me an error.

Main different in the code is that my code uses QtQuick2ApplicationViewer instead of QmlApplicationViewer and it looks like QtQuick2ApplicationViewer do not have “.pos” property.

This is my main.cpp

#include  #include "qtquick2applicationviewer.h" #include   int main(int argc, char *argv[]) {     QGuiApplication app(argc, argv);      QtQuick2ApplicationViewer viewer;     viewer.rootContext()->setContextProperty("QmlApplicationViewer", (QObject *)&viewer);     viewer.setFlags(Qt::FramelessWindowHint);     viewer.setMainQmlFile(QStringLiteral("qml/ubusell/main.qml"));     viewer.showExpanded();      return app.exec(); } 

This is part of my main.qml

MouseArea {     id: mouseRegion     anchors.fill: parent;     property variant clickPos: "1,1"          onPressed: {             clickPos  = Qt.point(mouse.x,mouse.y)         }          onPositionChanged: {             var delta = Qt.point(mouse.x-clickPos.x, mouse.y-clickPos.y)             print(QmlApplicationViewer.pos)             QmlApplicationViewer.pos = (20,20)             QmlApplicationViewer.pos = Qt.point(QmlApplicationViewer.pos.x+delta.x,                               QmlApplicationViewer.pos.y+delta.y)         } } 

When I try to drag window I get this error:

TypeError: Cannot read property 'x' of undefined

Any ideas ? Is it even possible with QtQuick2 ? Thanks for help!

回答1:

In my project I do:

property variant clickPos: "1,1"  onPressed: {     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; } 

In MouseArea.

回答2:

Also to resemble Windows behaviour of maximizing window when dragging it above vertical edge of the screen:

MouseArea {     anchors.fill: parent;     property variant clickPos: "1,1"      onPressed: {         clickPos = Qt.point(mouse.x,mouse.y)     }      onPositionChanged: {         var delta = Qt.point(mouse.x-clickPos.x, mouse.y-clickPos.y)         var new_x = mainWindow.x + delta.x         var new_y = mainWindow.y + delta.y         if (new_y 

回答3:

I done it as follow:

Window {     id: window     height: 400     width: 250     x: (Screen.width - width)/2     //

Now you can move window using dragging top 50 pixels or any where that is not under any MouseArea.

文章来源: QtQuick2 dragging frameless window