QtQuick Qt Quick Examples - Canvas

Canvas is a collection of small QML examples relating to the Canvas type. Each example is a small QML file emphasizing a particular type or feature.

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.

Red heart uses the bezier curve API to stroke and fill a red heart.

ctx.beginPath();
ctx.moveTo(75,40);
ctx.bezierCurveTo(75,37,70,25,50,25);
ctx.bezierCurveTo(20,25,20,62.5,20,62.5);
ctx.bezierCurveTo(20,80,40,102,75,120);
ctx.bezierCurveTo(110,102,130,80,130,62.5);
ctx.bezierCurveTo(130,62.5,130,25,100,25);
ctx.bezierCurveTo(85,25,75,37,75,40);
ctx.closePath();

Talk bubble uses the quadraticCurveTo() API to stroke and fill a customized talk bubble:

ctx.beginPath();
ctx.moveTo(75,25);
ctx.quadraticCurveTo(25,25,25,62.5);
ctx.quadraticCurveTo(25,100,50,100);
ctx.quadraticCurveTo(50,120,30,125);
ctx.quadraticCurveTo(60,120,65,100);
ctx.quadraticCurveTo(125,100,125,62.5);
ctx.quadraticCurveTo(125,25,75,25);
ctx.closePath();

This example also demonstrates the fillText() API:

ctx.fillStyle = "white";
ctx.font = "bold 17px sans-serif";
ctx.fillText("Qt Quick", 40, 70);

Squircle uses a collection of simple moveTo() and lineTo() path APIs to draw a smooth squircle.

Rounded rectangle uses a collection of lineTo() and arcTo() path APIs to draw a rounded rectangle.

Smile face uses several paths to draw and fill a smiling face.

Clip uses the clip API to clip a given image.

ctx.clip();
ctx.drawImage(canvas.imagefile, 0, 0);

Tiger uses the SVG path API to draw a tiger with a collection of SVG path strings.

for (var i = 0; i < Tiger.tiger.length; i++) {
    if (Tiger.tiger[i].width != undefined)
        ctx.lineWidth = Tiger.tiger[i].width;
    if (Tiger.tiger[i].path != undefined)
        ctx.path = Tiger.tiger[i].path;
    if (Tiger.tiger[i].fill != undefined) {
        ctx.fillStyle = Tiger.tiger[i].fill;
        ctx.fill();
    }
    if (Tiger.tiger[i].stroke != undefined) {
        ctx.strokeStyle = Tiger.tiger[i].stroke;
        ctx.stroke();
    }
}

Files:

  • canvas/canvas.qml
  • canvas/bezierCurve/bezierCurve.qml
  • canvas/clip/clip.qml
  • canvas/quadraticCurveTo/quadraticCurveTo.qml
  • canvas/roundedrect/roundedrect.qml
  • canvas/smile/smile.qml
  • canvas/squircle/squircle.qml
  • canvas/tiger/tiger.js
  • canvas/tiger/tiger.qml
  • canvas/main.cpp
  • canvas/canvas.pro
  • canvas/canvas.qrc