Qt 5.9 | Qt Quick | UI Components: Dial Control Example | dialcontrol.qml Example File

Qt 5.9.9 Reference Documentation

# dialcontrol.qml Example File

customitems/dialcontrol/dialcontrol.qml

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      import QtQuick 2.2
      import QtQuick.Window 2.1
      import "content"

      Rectangle {
          color: "#545454"
          width: 300; height: 300

          // Dial with a slider to adjust it
          Dial {
              id: dial
              anchors.centerIn: parent
              value: slider.x * 100 / (container.width - 32)
          }

          Rectangle {
              id: container
              property int oldWidth: 0
              anchors { bottom: parent.bottom; left: parent.left
                  right: parent.right; leftMargin: 20; rightMargin: 20
                  bottomMargin: 10
              }
              height: 16

              radius: 8
              opacity: 0.7
              antialiasing: true
              gradient: Gradient {
                  GradientStop { position: 0.0; color: "gray" }
                  GradientStop { position: 1.0; color: "white" }
              }

              onWidthChanged: {
                  if (oldWidth === 0) {
                      oldWidth = width;
                      return
                  }

                  var desiredPercent = slider.x * 100 / (oldWidth - 32)
                  slider.x = desiredPercent * (width - 32) / 100
                  oldWidth = width
              }

              Rectangle {
                  id: slider
                  x: 1; y: 1; width: 30; height: 14
                  radius: 6
                  antialiasing: true
                  gradient: Gradient {
                      GradientStop { position: 0.0; color: "#424242" }
                      GradientStop { position: 1.0; color: "black" }
                  }

                  MouseArea {
                      anchors.fill: parent
                      anchors.margins: -16 // Increase mouse area a lot outside the slider
                      drag.target: parent; drag.axis: Drag.XAxis
                      drag.minimumX: 2; drag.maximumX: container.width - 32
                  }
              }
          }
          QuitButton {
              anchors.right: parent.right
              anchors.top: parent.top
              anchors.margins: 10
          }
      }