Qt Quick Examples - Drag and Drop
Drag and Drop is a collection of small QML examples relating to the drag and drop functionality. For more information, visit the Drag and Drop page.
Running the Example
To run the example from Qt Creator, open the Welcome mode and select the example from Examples. For more information, visit Building and Running an Example.
Tiles
Tiles adds drag and drop to simple rectangles, which you can drag into a specific grid.
It has a DragTile component which uses a MouseArea to move an item when dragged:
Item {
id: root
property string colorKey
width: 64; height: 64
MouseArea {
id: mouseArea
width: 64; height: 64
anchors.centerIn: parent
drag.target: tile
onReleased: parent = tile.Drag.target !== null ? tile.Drag.target : root
Rectangle {
id: tile
width: 64; height: 64
anchors.verticalCenter: parent.verticalCenter
anchors.horizontalCenter: parent.horizontalCenter
color: colorKey
Drag.keys: [ colorKey ]
Drag.active: mouseArea.drag.active
Drag.hotSpot.x: 32
Drag.hotSpot.y: 32
states: State {
when: mouseArea.drag.active
ParentChange { target: tile; parent: root }
AnchorChanges { target: tile; anchors.verticalCenter: undefined; anchors.horizontalCenter: undefined }
}
}
}
}
And a DropTile component on which the dragged tiles can be dropped:
DropArea {
id: dragTarget
property string colorKey
property alias dropProxy: dragTarget
width: 64; height: 64
keys: [ colorKey ]
Rectangle {
id: dropRectangle
anchors.fill: parent
color: colorKey
states: [
State {
when: dragTarget.containsDrag
PropertyChanges {
target: dropRectangle
color: "grey"
}
}
]
}
}
The keys property of the DropArea will only allow an item to be dropped on it if it has a matching key in its Drag.keys property.
GridView Example
The GridView Example adds drag and drop to a GridView, allowing you to reorder the list. It also uses a DelegateModel to move a delegate item to the position of another item it is dragged over.
model: DelegateModel {
delegate: MouseArea {
id: delegateRoot
property int visualIndex: DelegateModel.itemsIndex
width: 80; height: 80
drag.target: icon
Rectangle {
id: icon
width: 72; height: 72
anchors {
horizontalCenter: parent.horizontalCenter;
verticalCenter: parent.verticalCenter
}
color: model.color
radius: 3
Drag.active: delegateRoot.drag.active
Drag.source: delegateRoot
Drag.hotSpot.x: 36
Drag.hotSpot.y: 36
states: [
State {
when: icon.Drag.active
ParentChange {
target: icon
parent: root
}
AnchorChanges {
target: icon;
anchors.horizontalCenter: undefined;
anchors.verticalCenter: undefined
}
}
]
}
DropArea {
anchors { fill: parent; margins: 15 }
onEntered: visualModel.items.move(drag.source.visualIndex, delegateRoot.visualIndex)
}
}
Files: