diff options
Diffstat (limited to 'examples/quick/canvas/clip/clip.qml')
| -rw-r--r-- | examples/quick/canvas/clip/clip.qml | 175 |
1 files changed, 102 insertions, 73 deletions
diff --git a/examples/quick/canvas/clip/clip.qml b/examples/quick/canvas/clip/clip.qml index c39da7d108..3d0591f97a 100644 --- a/examples/quick/canvas/clip/clip.qml +++ b/examples/quick/canvas/clip/clip.qml @@ -6,108 +6,137 @@ import QtQuick.Controls import "../" Item { - id:container + id: root width: 320 height: 480 Column { - spacing:5 - anchors.fill: parent - anchors.topMargin: 12 + spacing: 5 + anchors { + fill: root + topMargin: 12 + } Label { - font.pointSize: 24 - font.bold: true - text: "Squircle with Clip" anchors.horizontalCenter: parent.horizontalCenter - color: "#777" + text: qsTr("Squircle with Clip") + color: Qt.lighter(palette.text) + font { + pointSize: 24 + bold: true + } } Canvas { id: canvas - width: 320 - height: 280 - property color strokeStyle: Qt.darker(fillStyle, 1.2) - property color fillStyle:"#14aaff" // green - property int lineWidth:2 - property int nSize:nCtrl.value - property real radius:rCtrl.value - property bool fill:true - property bool stroke:false - property real px: width/2 - property real py: height/2 + 20 - property real alpha: 1.0 - property string imagefile:"../contents/qt-logo.png" + + readonly property color strokeStyle: Qt.darker(fillStyle, 1.2) + readonly property color fillStyle: "#14aaff" // green + readonly property int lineWidth: 2 + readonly property alias nSize: nCtrl.value + readonly property alias radius: rCtrl.value + readonly property alias fill: toggleFillCheckBox.checked + readonly property alias stroke: toggleStrokeCheckBox.checked + readonly property real px: width / 2 + readonly property real py: height / 2 + 20 + readonly property real alpha: 1.0 + readonly property string imagefile: "../contents/qt-logo.png" + + width: root.width + height: parent.height - controls.height antialiasing: true - Component.onCompleted:loadImage(canvas.imagefile); - - onRadiusChanged:requestPaint(); - onLineWidthChanged:requestPaint(); - onNSizeChanged:requestPaint(); - onFillChanged:requestPaint(); - onStrokeChanged:requestPaint(); - onImageLoaded : requestPaint(); - onPaint: squcirle(); - - function squcirle() { - var ctx = canvas.getContext("2d"); - var N = canvas.nSize; - var R = canvas.radius; - - N=Math.abs(N); - var M=N; - if (N>100) M=100; - if (N<0.00000000001) M=0.00000000001; - - ctx.save(); - ctx.globalAlpha = canvas.alpha; - ctx.fillStyle = "white"; - ctx.fillRect(0, 0, canvas.width, canvas.height); - - ctx.strokeStyle = canvas.strokeStyle; - ctx.fillStyle = canvas.fillStyle; - ctx.lineWidth = canvas.lineWidth; - - ctx.beginPath(); - var i = 0, x, y; - for (i=0; i<(2*R+1); i++){ - x = Math.round(i-R) + canvas.px; - y = Math.round(Math.pow(Math.abs(Math.pow(R,M)-Math.pow(Math.abs(i-R),M)),1/M)) + canvas.py; - - if (i == 0) - ctx.moveTo(x, y); + + Component.onCompleted: loadImage(canvas.imagefile) + onRadiusChanged: requestPaint() + onLineWidthChanged: requestPaint() + onNSizeChanged: requestPaint() + onFillChanged: requestPaint() + onStrokeChanged: requestPaint() + onImageLoaded: requestPaint() + + onPaint: function() { + let ctx = canvas.getContext("2d") + const N = Math.abs(canvas.nSize) + const R = canvas.radius + + const M = Math.max(0.00000000001, Math.min(N, 100)) + + ctx.save() + ctx.globalAlpha = canvas.alpha + ctx.fillStyle = "white" + ctx.fillRect(0, 0, canvas.width, canvas.height) + + ctx.strokeStyle = canvas.strokeStyle + ctx.fillStyle = canvas.fillStyle + ctx.lineWidth = canvas.lineWidth + + ctx.beginPath() + let i, x, y + for (i = 0; i < (2 * R + 1); i++) { + x = Math.round(i - R) + canvas.px + y = Math.round(Math.pow(Math.abs(Math.pow(R, M) - Math.pow(Math.abs(i - R), M)), 1 / M)) + canvas.py + + if (i === 0) + ctx.moveTo(x, y) else - ctx.lineTo(x, y); + ctx.lineTo(x, y) } - for (i=(2*R); i<(4*R+1); i++){ - x =Math.round(3*R-i)+canvas.px; - y = Math.round(-Math.pow(Math.abs(Math.pow(R,M)-Math.pow(Math.abs(3*R-i),M)),1/M)) + canvas.py; - ctx.lineTo(x, y); + for (i = (2 * R); i < (4 * R + 1); i++) { + x = Math.round(3 * R - i) + canvas.px + y = Math.round(-Math.pow(Math.abs(Math.pow(R, M) - Math.pow(Math.abs(3 * R - i), M)), 1 / M)) + canvas.py + ctx.lineTo(x, y) } - ctx.closePath(); + ctx.closePath() if (canvas.stroke) { - ctx.stroke(); + ctx.stroke() } if (canvas.fill) { - ctx.fill(); + ctx.fill() } //! [0] - ctx.clip(); - ctx.drawImage(canvas.imagefile, 0, 0); + ctx.clip() + ctx.drawImage(canvas.imagefile, 0, 0) //! [0] - ctx.restore(); + ctx.restore() } } } Column { id: controls - anchors.bottom: parent.bottom - anchors.bottomMargin: 12 + anchors { + bottom: parent.bottom + bottomMargin: 12 + } - LabeledSlider {id: nCtrl; min: 1; max: 10; init: 4; name: "N"; width: container.width} - LabeledSlider {id: rCtrl; min: 30; max: 180; init: 80; name: "Radius"; width: container.width} + LabeledSlider { + id: nCtrl + name: qsTr("N") + width: root.width + min: 1 + max: 10 + value: 4 + } + LabeledSlider { + id: rCtrl + name: qsTr("Radius") + width: root.width + min: 30 + max: 180 + value: 80 + } + Row { + CheckBox { + id: toggleFillCheckBox + checked: true + text: qsTr("Toggle fill") + } + CheckBox { + id: toggleStrokeCheckBox + text: qsTr("Toggle stroke") + } + } } } |