我有 Rectangle
填充了 MouseArea
,它在 onPressAndHold()
处理程序上显示第二个 Rectangle
并传输 将
操作拖到那个Rectangle
。问题是,当我将第二个 Rectangle
移到 DropArea
上时,它不会通知任何操作(onEntered
、onExited
,onDropped
)。我尝试以多种组合来执行此操作,但从未奏效。这是一个示例,我是否遗漏了什么?
import QtQuick 2.0
import QtQuick.Window 2.0
Window {
id: appDrawerRoot
visible: true
width: 360; height: 360
property bool isRectVisible: false
Rectangle{
id:rect
color: "blue"
x:50; y:50
width: 50; height: 50
MouseArea{
anchors.fill: parent
onPressed: {
cloneRect.x = rect.x
cloneRect.y = rect.y
}
onPressAndHold: {
isRectVisible = true
drag.target = cloneRect
}
onReleased: {
drag.target = undefined
isRectVisible = false
cloneRect.x = rect.x
cloneRect.y = rect.y +100
}
}
}
Item{
id: cloneRect
width: 50; height:50
visible: isRectVisible
MouseArea{
id: mouseArea
width:50; height:50
anchors.centerIn: parent
Rectangle{
id:tile
width: 50; height:50
color:"black"
opacity: 0.5
anchors.verticalCenter: parent.verticalCenter
anchors.horizontalCenter: parent.horizontalCenter
Drag.hotSpot.x: 25
Drag.hotSpot.y: 25
}
}
}
DropArea {
id:dropArea
x:153
y:158
z:-1
width:100; height: 100
Rectangle{
anchors.fill: parent
color: "Green"
}
onEntered: {
drag.source.opacity = 1
console.log("ENTERED")
}
onExited: {
drag.source.opacity = 0.5
console.log("EXITED")
}
onDropped:
{
console.log("DROPPED")
}
}
}
最佳答案
您的代码的主要问题是您没有设置拖动的 active
属性。像这样修改你的代码:
//..........................
Item{
id: cloneRect
width: 50; height:50
visible: isRectVisible
Drag.active: visible // Add this line of code
//.....................
有关更多信息,请参阅 Qt 示例。在 Qt Creator 的“欢迎”屏幕上点击“示例”按钮并搜索“拖放 qml”。
关于qt - DropArea 不通知有关 onEntered、onExited、onDropped 的操作,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34844314/