textselection.qml Example File | Qt Quick 5.9

Qt 5.9 | Qt Quick | Qt Quick Examples - Text | textselection.qml Example File

Qt 5.9.2 Reference Documentation

# textselection.qml Example File

text/textselection/textselection.qml

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** 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 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

      Rectangle {
          id: editor
          color: "lightGrey"
          width: 640; height: 480

          Rectangle {
              color: "white"
              anchors.fill: parent
              anchors.margins: 20

              BorderImage {
                  id: startHandle
                  source: "pics/startHandle.sci"
                  opacity: 0.0
                  width: 10
                  x: edit.positionToRectangle(edit.selectionStart).x - flick.contentX-width
                  y: edit.positionToRectangle(edit.selectionStart).y - flick.contentY
                  height: edit.positionToRectangle(edit.selectionStart).height
              }

              BorderImage {
                  id: endHandle
                  source: "pics/endHandle.sci"
                  opacity: 0.0
                  width: 10
                  x: edit.positionToRectangle(edit.selectionEnd).x - flick.contentX
                  y: edit.positionToRectangle(edit.selectionEnd).y - flick.contentY
                  height: edit.positionToRectangle(edit.selectionEnd).height
              }

              Flickable {
                  id: flick

                  anchors.fill: parent
                  contentWidth: edit.paintedWidth
                  contentHeight: edit.paintedHeight
                  interactive: true
                  clip: true

                  function ensureVisible(r) {
                      if (contentX >= r.x)
                          contentX = r.x;
                      else if (contentX+width <= r.x+r.width)
                          contentX = r.x+r.width-width;
                      if (contentY >= r.y)
                          contentY = r.y;
                      else if (contentY+height <= r.y+r.height)
                          contentY = r.y+r.height-height;
                  }

                  TextEdit {
                      id: edit
                      width: flick.width
                      height: flick.height
                      focus: true
                      wrapMode: TextEdit.Wrap
                      textFormat: TextEdit.RichText

                      onCursorRectangleChanged: flick.ensureVisible(cursorRectangle)

                      text: "<h1>Text Selection</h1>"
                          +"<p>This example is a whacky text selection mechanisms, showing how these can be implemented in the TextEdit element, to cater for whatever style is appropriate for the target platform."
                          +"<p><b>Press-and-hold</b> to select a word, then drag the selection handles."
                          +"<p><b>Drag outside the selection</b> to scroll the text."
                          +"<p><b>Click inside the selection</b> to cut/copy/paste/cancel selection."
                          +"<p>It's too whacky to let you paste if there is no current selection."

                  }
              }

              Item {
                  id: menu
                  opacity: 0.0
                  width: 100
                  height: 120
                  anchors.centerIn: parent

                  Rectangle {
                      border.width: 1
                      border.color: "darkBlue"
                      radius: 15
                      color: "#806080FF"
                      anchors.fill: parent
                  }

                  Column {
                      anchors.centerIn: parent
                      spacing: 8

                      Rectangle {
                          border.width: 1
                          border.color: "darkBlue"
                          color: "#ff7090FF"
                          width: 60
                          height: 16

                          Text { anchors.centerIn: parent; text: "Cut" }

                          MouseArea {
                              anchors.fill: parent
                              onClicked: { edit.cut(); editor.state = "" }
                          }
                      }

                      Rectangle {
                          border.width: 1
                          border.color: "darkBlue"
                          color: "#ff7090FF"
                          width: 60
                          height: 16

                          Text { anchors.centerIn: parent; text: "Copy" }

                          MouseArea {
                              anchors.fill: parent
                              onClicked: { edit.copy(); editor.state = "selection" }
                          }
                      }

                      Rectangle {
                          border.width: 1
                          border.color: "darkBlue"
                          color: "#ff7090FF"
                          width: 60
                          height: 16

                          Text { anchors.centerIn: parent; text: "Paste" }

                          MouseArea {
                              anchors.fill: parent
                              onClicked: { edit.paste(); edit.cursorPosition = edit.selectionEnd; editor.state = "" }
                          }
                      }

                      Rectangle {
                          border.width: 1
                          border.color: "darkBlue"
                          color: "#ff7090FF"
                          width: 60
                          height: 16

                          Text { anchors.centerIn: parent; text: "Deselect" }

                          MouseArea {
                              anchors.fill: parent
                              onClicked: {
                                  edit.cursorPosition = edit.selectionEnd;
                                  edit.deselect();
                                  editor.state = ""
                              }
                          }
                      }
                  }
              }
          }

          states: [
              State {
                  name: "selection"
                  PropertyChanges { target: startHandle; opacity: 1.0 }
                  PropertyChanges { target: endHandle; opacity: 1.0 }
              },
              State {
                  name: "menu"
                  PropertyChanges { target: startHandle; opacity: 0.5 }
                  PropertyChanges { target: endHandle; opacity: 0.5 }
                  PropertyChanges { target: menu; opacity: 1.0 }
              }
          ]
      }