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-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
-** the names of its contributors may be used to endorse or promote
-** products derived from this software without specific prior written
-** permission.
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-import QtQuick 2.0
-import "../contents"
-Item {
- id:container
- width:360
- height:600
-
- Column {
- spacing:5
- anchors.fill:parent
- Text { font.pointSize:25; text:"Squircles"; anchors.horizontalCenter:parent.horizontalCenter}
- Image {
- anchors.horizontalCenter:parent.horizontalCenter
- source:"squircle.png"
- width:250
- height:25
- }
- Canvas {
- id:canvas
- width:360
- height:360
- smooth:true
- renderTarget:Canvas.Image
- renderStrategy: Canvas.Immediate
-
- property string strokeStyle:"blue"
- property string fillStyle:"steelblue"
- 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:xCtrl.value
- property real py:yCtrl.value
- property real alpha:alphaCtrl.value
-
- onAlphaChanged:requestPaint();
- onRadiusChanged:requestPaint();
- onLineWidthChanged:requestPaint();
- onNSizeChanged:requestPaint();
- onFillChanged:requestPaint();
- onStrokeChanged:requestPaint();
- onPxChanged:requestPaint();
- onPyChanged: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 = "gray";
- 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);
- else
- 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();
- if (canvas.stroke) {
- ctx.stroke();
- }
-
- if (canvas.fill) {
- ctx.fill();
- }
-
- ctx.fillStyle = "yellow";
- ctx.font = "Helvetica 16px";
- ctx.fillText("|X-" + Math.round(canvas.px) + "|^" + N + " + |Y-"+Math.round(canvas.py)+"|^" + N + " = |" + Math.round(R) + "|^" + N, canvas.px - 125, canvas.py);
- ctx.restore();
- }
- }
-
- Rectangle {
- id:controls
- width:360
- height:160
- Column {
- spacing:3
- Slider {id:nCtrl; width:300; height:30; min:1; max:10; init:4; name:"N"}
- Slider {id:rCtrl; width:300; height:30; min:30; max:180; init:100; name:"Radius"}
- Slider {id:xCtrl; width:300; height:30; min:50; max:300; init:180; name:"X"}
- Slider {id:yCtrl; width:300; height:30; min:30; max:300; init:220; name:"Y"}
- Slider {id:alphaCtrl; width:300; height:30; min:0; max:1; init:1; name:"Alpha"}
- }
- }
- }
-}