interactive.qml Example File | Qt Quick 5.12.5

Qt 5.12 | Qt Quick | Qt Quick Examples - Shapes | interactive.qml Example File

Qt 5.12.5 Reference Documentation

# interactive.qml Example File

shapes/content/interactive.qml

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the QtQuick module 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 2.9
      import QtQuick.Shapes 1.0

      Rectangle {
          id: root
          width: 1024
          height: 768

          property color col: "lightsteelblue"
          gradient: Gradient {
              GradientStop { position: 0.0; color: Qt.tint(root.col, "#20FFFFFF") }
              GradientStop { position: 0.1; color: Qt.tint(root.col, "#20AAAAAA") }
              GradientStop { position: 0.9; color: Qt.tint(root.col, "#20666666") }
              GradientStop { position: 1.0; color: Qt.tint(root.col, "#20000000") }
          }

          property int mode: 0
          property bool showResizers: true
          property bool fill: false

          Row {
              x: 20
              y: 10
              spacing: 20
              Rectangle {
                  border.color: "black"
                  color: root.mode === 0 ? "red" : "transparent"
                  width: 100
                  height: 40
                  Text {
                      anchors.centerIn: parent
                      text: "Line"
                  }
                  MouseArea {
                      anchors.fill: parent
                      onClicked: root.mode = 0
                  }
              }
              Rectangle {
                  border.color: "black"
                  color: root.mode === 1 ? "red" : "transparent"
                  width: 100
                  height: 40
                  Text {
                      anchors.centerIn: parent
                      text: "Cubic"
                  }
                  MouseArea {
                      anchors.fill: parent
                      onClicked: root.mode = 1
                  }
              }
              Rectangle {
                  border.color: "black"
                  color: root.mode === 2 ? "red" : "transparent"
                  width: 100
                  height: 40
                  Text {
                      anchors.centerIn: parent
                      text: "Quadratic"
                  }
                  MouseArea {
                      anchors.fill: parent
                      onClicked: root.mode = 2
                  }
              }

              Slider {
                  id: widthSlider
                  name: "Width"
                  min: 1
                  max: 60
                  init: 4
              }

              Rectangle {
                  border.color: "black"
                  color: root.showResizers ? "yellow" : "transparent"
                  width: 50
                  height: 40
                  Text {
                      anchors.centerIn: parent
                      text: "Manip"
                  }
                  MouseArea {
                      anchors.fill: parent
                      onClicked: {
                          root.showResizers = !root.showResizers;
                          for (var i = 0; i < canvas.resizers.length; ++i)
                              canvas.resizers[i].visible = root.showResizers;
                      }
                  }
              }

              Rectangle {
                  border.color: "black"
                  color: root.fill ? "yellow" : "transparent"
                  width: 50
                  height: 40
                  Text {
                      anchors.centerIn: parent
                      text: "Fill"
                  }
                  MouseArea {
                      anchors.fill: parent
                      onClicked: root.fill = !root.fill
                  }
              }
          }

          Rectangle {
              id: canvas
              width: root.width - 40
              height: root.height - 120
              x: 20
              y: 100

              property variant activePath: null

              property variant resizers: []
              property variant funcs

              function genResizer(obj, x, y, xprop, yprop, color) {
                  var ma = Qt.createQmlObject('import QtQuick 2.9; import QtQuick.Shapes 1.0; Rectangle { id: rr; property variant obj; color: "' + color + '"; width: 20; height: 20;'+
                                               'MouseArea { anchors.fill: parent; hoverEnabled: true;' +
                                               'onEntered: color = "yellow"; onExited: color = "' + color + '";' +
                                               'property bool a: false; onPressed: a = true; onReleased: a = false; ' +
                                               'onPositionChanged: if (a) { var pt = mapToItem(rr.parent, mouse.x, mouse.y);' +
                                               'obj.' + xprop + ' = pt.x; obj.' + yprop + ' = pt.y; rr.x = pt.x - 10; rr.y = pt.y - 10; } } }',
                                               canvas, "resizer_item");
                  ma.visible = root.showResizers;
                  ma.obj = obj;
                  ma.x = x - 10;
                  ma.y = y - 10;
                  resizers.push(ma);
                  return ma;
              }

              Component.onCompleted: {
                  funcs = [
                              { "start": function(x, y) {
                                  var p = Qt.createQmlObject('import QtQuick 2.9; import QtQuick.Shapes 1.0; ShapePath {' +
                                                             'strokeColor: "black"; fillColor: "transparent";'+
                                                             'strokeWidth: ' + widthSlider.value + ';' +
                                                             'startX: ' + x + '; startY: ' + y + ';' +
                                                             'PathLine { x: ' + x + ' + 1; y: ' + y + ' + 1 } }',
                                                             root, "dynamic_visual_path");
                                  shape.data.push(p);
                                  activePath = p;
                              }, "move": function(x, y) {
                                  if (!activePath)
                                      return;
                                  var pathObj = activePath.pathElements[0];
                                  pathObj.x = x;
                                  pathObj.y = y;
                              }, "end": function() {
                                  canvas.genResizer(activePath, activePath.startX, activePath.startY, "startX", "startY", "red");
                                  var pathObj = activePath.pathElements[0];
                                  canvas.genResizer(pathObj, pathObj.x, pathObj.y, "x", "y", "red");
                                  activePath = null;
                              }
                              },
                              { "start": function(x, y) {
                                  var p = Qt.createQmlObject('import QtQuick 2.9; import QtQuick.Shapes 1.0; ShapePath {' +
                                                             'strokeColor: "black"; fillColor: "' + (root.fill ? 'green' : 'transparent') + '";'+
                                                             'strokeWidth: ' + widthSlider.value + ';' +
                                                             'startX: ' + x + '; startY: ' + y + ';' +
                                                             'PathCubic { x: ' + x + ' + 1; y: ' + y + ' + 1;' +
                                                             'control1X: ' + x + ' + 50; control1Y: ' + y + ' + 50; control2X: ' + x + ' + 150; control2Y: ' + y + ' + 50; } }',
                                                             root, "dynamic_visual_path");
                                  shape.data.push(p);
                                  activePath = p;
                              }, "move": function(x, y) {
                                  if (!activePath)
                                      return;
                                  var pathObj = activePath.pathElements[0];
                                  pathObj.x = x;
                                  pathObj.y = y;
                              }, "end": function() {
                                  canvas.genResizer(activePath, activePath.startX, activePath.startY, "startX", "startY", "red");
                                  var pathObj = activePath.pathElements[0];
                                  canvas.genResizer(pathObj, pathObj.x, pathObj.y, "x", "y", "red");
                                  canvas.genResizer(pathObj, pathObj.control1X, pathObj.control1Y, "control1X", "control1Y", "blue");
                                  canvas.genResizer(pathObj, pathObj.control2X, pathObj.control2Y, "control2X", "control2Y", "lightBlue");
                                  activePath = null;
                              }
                              },
                              { "start": function(x, y) {
                                  var p = Qt.createQmlObject('import QtQuick 2.9; import QtQuick.Shapes 1.0; ShapePath {' +
                                                             'strokeColor: "black"; fillColor: "' + (root.fill ? 'green' : 'transparent') + '";'+
                                                             'strokeWidth: ' + widthSlider.value + ';' +
                                                             'startX: ' + x + '; startY: ' + y + ';' +
                                                             'PathQuad { x: ' + x + ' + 1; y: ' + y + ' + 1;' +
                                                             'controlX: ' + x + ' + 50; controlY: ' + y + ' + 50 } }',
                                                             root, "dynamic_visual_path");
                                  shape.data.push(p);
                                  activePath = p;
                              }, "move": function(x, y) {
                                  if (!activePath)
                                      return;
                                  var pathObj = activePath.pathElements[0];
                                  pathObj.x = x;
                                  pathObj.y = y;
                              }, "end": function() {
                                  canvas.genResizer(activePath, activePath.startX, activePath.startY, "startX", "startY", "red");
                                  var pathObj = activePath.pathElements[0];
                                  canvas.genResizer(pathObj, pathObj.x, pathObj.y, "x", "y", "red");
                                  canvas.genResizer(pathObj, pathObj.controlX, pathObj.controlY, "controlX", "controlY", "blue");
                                  activePath = null;
                              }
                              }
                          ];
              }

              MouseArea {
                  anchors.fill: parent
                  onPressed: {
                      canvas.funcs[root.mode].start(mouse.x, mouse.y);
                  }
                  onPositionChanged: {
                      canvas.funcs[root.mode].move(mouse.x, mouse.y);
                  }
                  onReleased: {
                      canvas.funcs[root.mode].end();
                  }
              }

              Shape {
                  id: shape
                  anchors.fill: parent

                  data: []
              }
          }
      }