smile.qml Example File

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  import QtQuick 2.0
  import "../contents"
  import "../../shared"

  Item {
      id: container
      width: 320
      height: 480

      Column {
          spacing: 6
          anchors.fill: parent
          anchors.topMargin: 12

          Text {
              font.pointSize: 24
              font.bold: true
              text: "Smile with arcs"
              anchors.horizontalCenter: parent.horizontalCenter
              color: "#777"
          }

          Canvas {
              id: canvas
              width: 320
              height: parent.height - controls.height
              antialiasing: true

              property color strokeStyle:  Qt.darker(fillStyle, 1.6)
              property color fillStyle: "#e0c31e" // yellow
              property int lineWidth: lineWidthCtrl.value
              property bool fill: true
              property bool stroke: true
              property real scale : scaleCtrl.value
              property real rotate : rotateCtrl.value

              onLineWidthChanged:requestPaint();
              onFillChanged:requestPaint();
              onStrokeChanged:requestPaint();
              onScaleChanged:requestPaint();
              onRotateChanged:requestPaint();

              onPaint: {
                  var ctx = canvas.getContext('2d');
                  var originX = 85
                  var originY = 75
                  ctx.save();
                  ctx.clearRect(0, 0, canvas.width, canvas.height);
                  ctx.translate(originX, originX);
                  ctx.globalAlpha = canvas.alpha;
                  ctx.strokeStyle = canvas.strokeStyle;
                  ctx.fillStyle = canvas.fillStyle;
                  ctx.lineWidth = canvas.lineWidth;

                  ctx.translate(originX, originY)
                  ctx.scale(canvas.scale, canvas.scale);
                  ctx.rotate(canvas.rotate);
                  ctx.translate(-originX, -originY)

                  ctx.beginPath();
                  ctx.moveTo(75 + 50  * Math.cos(0),
                             75 - 50  * Math.sin(Math.PI*2));
                  ctx.arc(75,75,50,0,Math.PI*2,true); // Outer circle
                  ctx.moveTo(75,70);
                  ctx.arc(75,70,35,0,Math.PI,false);   // Mouth (clockwise)
                  ctx.moveTo(60,65);
                  ctx.arc(60,65,5,0,Math.PI*2,true);  // Left eye
                  ctx.moveTo(90 + 5  * Math.cos(0),
                             65 - 5  * Math.sin(Math.PI*2));
                  ctx.moveTo(90,65);
                  ctx.arc(90,65,5,0,Math.PI*2,true);  // Right eye
                  ctx.closePath();
                  if (canvas.fill)
                      ctx.fill();
                  if (canvas.stroke)
                      ctx.stroke();
                  ctx.restore();
              }
          }
      }
      Column {
          id: controls
          anchors.bottom: parent.bottom
          anchors.bottomMargin: 12
          Slider {id: lineWidthCtrl ; min: 1 ; max: 10 ; init: 2 ; name: "Outline"}
          Slider {id: scaleCtrl ; min: 0.1 ; max: 10 ; init: 1 ; name: "Scale"}
          Slider {id: rotateCtrl ; min: 0 ; max: Math.PI*2 ; init: 0 ; name: "Rotate"}
      }
  }