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import QtQuick 2.9
import QtQuick . Controls 2.0
Item {
id: root
property alias containsMouse: mouseArea . containsMouse
signal posChange ( int xOffset , int yOffset )
implicitWidth: 12 //这里隐式的宽为12
implicitHeight: 12 //这里隐式的高为12
property int posType: Qt . ArrowCursor
//5.10之前, qml是不能定义枚举的，
readonly property int posLeftTop: Qt . SizeFDiagCursor
readonly property int posLeftBottom: Qt . SizeBDiagCursor
readonly property int posRightTop: Qt . SizeBDiagCursor
readonly property int posRightBottom: Qt . SizeFDiagCursor
MouseArea {
id: mouseArea
anchors.fill: parent
hoverEnabled: true
property int lastX: 0
property int lastY: 0
onContainsMouseChanged: {
if ( containsMouse ) {
cursorShape = posType ;
} else {
cursorShape = Qt . ArrowCursor ;
}
}
onPressedChanged: {
if ( containsPress ) {
lastX = mouseX ;
lastY = mouseY ;
}
}
onPositionChanged: {
if ( pressed ) {
posChange ( mouseX - lastX , mouseY - lastY )
}
}
}
}