Qt 5.8 | Qt Quick | Qt Quick Examples - MouseArea | mousearea.qml Example File

Qt 5.8.0 Reference Documentation

# mousearea.qml Example File

mousearea/mousearea.qml

      /****************************************************************************
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      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the examples of the Qt Toolkit.
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      ** $QT_BEGIN_LICENSE:BSD$
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      import QtQuick 2.4

      Rectangle {
          id: box
          width: 320; height: 480

          Rectangle {
              id: redSquare
              width: 120; height: 120
              anchors.top: parent.top; anchors.left: parent.left; anchors.margins: 10
              color: "red"
              opacity: redSquareMouseArea.containsPress ? 0.6 : 1.0

              Text { text: "Click"; font.pixelSize: 16; anchors.centerIn: parent }

              MouseArea {
                  id: redSquareMouseArea
                  anchors.fill: parent
                  hoverEnabled: true
                  property string buttonID

                  acceptedButtons: Qt.AllButtons
                  // Value 'All.Buttons' is eqivalent to:
                  // 'Qt::LeftButton | Qt::RightButton | Qt::MiddleButton  .... | Qt::ExtraButton24'

                  onEntered: info.text = 'Entered'
                  onExited: info.text = 'Exited (pressed=' + pressed + ')'

                  onPressed: {
                      if (mouse.button == Qt.LeftButton)
                          buttonID = 'LeftButton'
                      else if (mouse.button == Qt.RightButton)
                          buttonID = 'RightButton'
                      else if (mouse.button == Qt.MidButton)
                          buttonID = 'MiddleButton'
                      else if (mouse.button == Qt.BackButton)
                          buttonID = 'BackButton'
                      else if (mouse.button == Qt.ForwardButton)
                          buttonID = 'ForwardButton'
                      else if (mouse.button == Qt.TaskButton)
                          buttonID = 'TaskButton'
                      else if (mouse.button == Qt.ExtraButton4)
                          buttonID = 'ExtraButton4'
                      else if (mouse.button == Qt.ExtraButton5)
                          buttonID = 'ExtraButton5'
                      else if (mouse.button == Qt.ExtraButton6)
                          buttonID = 'ExtraButton6'
                      else if (mouse.button == Qt.ExtraButton7)
                          buttonID = 'ExtraButton7'
                      else if (mouse.button == Qt.ExtraButton8)
                          buttonID = 'ExtraButton8'
                      else if (mouse.button == Qt.ExtraButton9)
                          buttonID = 'ExtraButton9'
                      else if (mouse.button == Qt.ExtraButton10)
                          buttonID = 'ExtraButton10'
                      else if (mouse.button == Qt.ExtraButton11)
                          buttonID = 'ExtraButton11'
                      else if (mouse.button == Qt.ExtraButton12)
                          buttonID = 'ExtraButton12'
                      else if (mouse.button == Qt.ExtraButton13)
                          buttonID = 'ExtraButton13'
                      else if (mouse.button == Qt.ExtraButton14)
                          buttonID = 'ExtraButton14'
                      else if (mouse.button == Qt.ExtraButton15)
                          buttonID = 'ExtraButton15'
                      else if (mouse.button == Qt.ExtraButton16)
                          buttonID = 'ExtraButton16'
                      else if (mouse.button == Qt.ExtraButton17)
                          buttonID = 'ExtraButton17'
                      else if (mouse.button == Qt.ExtraButton18)
                          buttonID = 'ExtraButton18'
                      else if (mouse.button == Qt.ExtraButton19)
                          buttonID = 'ExtraButton19'
                      else if (mouse.button == Qt.ExtraButton20)
                          buttonID = 'ExtraButton20'
                      else if (mouse.button == Qt.ExtraButton21)
                          buttonID = 'ExtraButton21'
                      else if (mouse.button == Qt.ExtraButton22)
                          buttonID = 'ExtraButton22'
                      else if (mouse.button == Qt.ExtraButton23)
                          buttonID = 'ExtraButton23'
                      else if (mouse.button == Qt.ExtraButton24)
                          buttonID = 'ExtraButton24'

                      info.text = 'Pressed (' + buttonID + ' shift='
                          + (mouse.modifiers & Qt.ShiftModifier ? 'true' : 'false') + ')'
                      var posInBox = redSquare.mapToItem(box, mouse.x, mouse.y)
                      posInfo.text = + mouse.x + ',' + mouse.y + ' in square'
                              + ' (' + posInBox.x + ',' + posInBox.y + ' in window)'
                  }

                  onReleased: {
                      btn.text = 'Released (isClick=' + mouse.isClick + ' wasHeld=' + mouse.wasHeld + ')'
                      posInfo.text = ''
                  }

                  onPressAndHold: btn.text = 'Press and hold'
                  onClicked: btn.text = 'Clicked (wasHeld=' + mouse.wasHeld + ')'
                  onDoubleClicked: btn.text = 'Double clicked'
              }
          }

          Rectangle {
              id: blueSquare
              width: 120; height: 120
              x: box.width - width - 10; y: 10    // making this item draggable, so don't use anchors
              color: "blue"

              Text { text: "Drag"; font.pixelSize: 16; color: "white"; anchors.centerIn: parent }

              MouseArea {
                  anchors.fill: parent
                  drag.target: blueSquare
                  drag.axis: Drag.XAndYAxis
                  drag.minimumX: 0
                  drag.maximumX: box.width - parent.width
                  drag.minimumY: 0
                  drag.maximumY: box.height - parent.width
              }
          }

          Text {
              id: info
              anchors.bottom: btn.top; anchors.horizontalCenter: parent.horizontalCenter; anchors.margins: 20

              onTextChanged: console.log(text)
          }

          Text {
              id: btn
              anchors.bottom: posInfo.top; anchors.horizontalCenter: parent.horizontalCenter; anchors.margins: 20
          }

          Text {
              id: posInfo
              anchors.bottom: parent.bottom; anchors.horizontalCenter: parent.horizontalCenter; anchors.margins: 20
          }
      }