roundedrect.qml Example File

 /****************************************************************************
 **
 ** Copyright (C) 2017 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, 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 The Qt Company Ltd 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"
 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: "Rounded rectangle"
             anchors.horizontalCenter: parent.horizontalCenter
             color: "#777"
         }
         Canvas {
             id: canvas
             width: 320
             height: 280
             antialiasing: true

             property int radius: rCtrl.value
             property int rectx: 60
             property int recty: 60
             property int rectWidth: width - 2*rectx
             property int rectHeight: height - 2*recty
             property color strokeStyle:  Qt.darker(fillStyle, 1.4)
             property color fillStyle: "#ae32a0" // purple
             property int lineWidth: lineWidthCtrl.value
             property bool fill: true
             property bool stroke: true
             property real alpha: 1.0

             onLineWidthChanged:requestPaint();
             onFillChanged:requestPaint();
             onStrokeChanged:requestPaint();
             onRadiusChanged:requestPaint();

             onPaint: {
                 var ctx = getContext("2d");
                 ctx.save();
                 ctx.clearRect(0,0,canvas.width, canvas.height);
                 ctx.strokeStyle = canvas.strokeStyle;
                 ctx.lineWidth = canvas.lineWidth
                 ctx.fillStyle = canvas.fillStyle
                 ctx.globalAlpha = canvas.alpha
                 ctx.beginPath();
                 ctx.moveTo(rectx+radius,recty);                 // top side
                 ctx.lineTo(rectx+rectWidth-radius,recty);
                 // draw top right corner
                 ctx.arcTo(rectx+rectWidth,recty,rectx+rectWidth,recty+radius,radius);
                 ctx.lineTo(rectx+rectWidth,recty+rectHeight-radius);    // right side
                 // draw bottom right corner
                 ctx.arcTo(rectx+rectWidth,recty+rectHeight,rectx+rectWidth-radius,recty+rectHeight,radius);
                 ctx.lineTo(rectx+radius,recty+rectHeight);              // bottom side
                 // draw bottom left corner
                 ctx.arcTo(rectx,recty+rectHeight,rectx,recty+rectHeight-radius,radius);
                 ctx.lineTo(rectx,recty+radius);                 // left side
                 // draw top left corner
                 ctx.arcTo(rectx,recty,rectx+radius,recty,radius);
                 ctx.closePath();
                 if (canvas.fill)
                     ctx.fill();
                 if (canvas.stroke)
                     ctx.stroke();
                 ctx.restore();
             }
         }
     }
     Column {
         anchors.bottom: parent.bottom
         anchors.bottomMargin: 12
         Slider {id: lineWidthCtrl ; min: 1 ; max: 10; init: 2 ; name: "Outline"}
         Slider {id: rCtrl ; min: 10 ; max: 80 ; init: 40 ; name: "Radius"}
     }
 }