Qt 5.9 | Qt Quick Controls | Qt Quick Controls - Text Editor Example | main.qml Example File

Qt 5.9.2 Reference Documentation

# main.qml Example File

texteditor/qml/main.qml

      /****************************************************************************
      **
      ** Copyright (C) 2016 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 2.2
      import QtQuick.Controls 1.2
      import QtQuick.Layouts 1.0
      import QtQuick.Dialogs 1.1
      import QtQuick.Window 2.1
      import org.qtproject.example 1.0

      ApplicationWindow {
          visible: true
          width: 640
          height: 480
          minimumWidth: 400
          minimumHeight: 300

          title: document.documentTitle + " - Text Editor Example"

          MessageDialog {
              id: aboutBox
              title: "About Text"
              text: "This is a basic text editor \nwritten with Qt Quick Controls"
              icon: StandardIcon.Information
          }

          Action {
              id: cutAction
              text: "Cut"
              shortcut: "ctrl+x"
              iconSource: "images/editcut.png"
              iconName: "edit-cut"
              onTriggered: textArea.cut()
          }

          Action {
              id: copyAction
              text: "Copy"
              shortcut: "Ctrl+C"
              iconSource: "images/editcopy.png"
              iconName: "edit-copy"
              onTriggered: textArea.copy()
          }

          Action {
              id: pasteAction
              text: "Paste"
              shortcut: "ctrl+v"
              iconSource: "images/editpaste.png"
              iconName: "edit-paste"
              onTriggered: textArea.paste()
          }

          Action {
              id: alignLeftAction
              text: "&Left"
              iconSource: "images/textleft.png"
              iconName: "format-justify-left"
              shortcut: "ctrl+l"
              onTriggered: document.alignment = Qt.AlignLeft
              checkable: true
              checked: document.alignment == Qt.AlignLeft
          }
          Action {
              id: alignCenterAction
              text: "C&enter"
              iconSource: "images/textcenter.png"
              iconName: "format-justify-center"
              onTriggered: document.alignment = Qt.AlignHCenter
              checkable: true
              checked: document.alignment == Qt.AlignHCenter
          }
          Action {
              id: alignRightAction
              text: "&Right"
              iconSource: "images/textright.png"
              iconName: "format-justify-right"
              onTriggered: document.alignment = Qt.AlignRight
              checkable: true
              checked: document.alignment == Qt.AlignRight
          }
          Action {
              id: alignJustifyAction
              text: "&Justify"
              iconSource: "images/textjustify.png"
              iconName: "format-justify-fill"
              onTriggered: document.alignment = Qt.AlignJustify
              checkable: true
              checked: document.alignment == Qt.AlignJustify
          }

          Action {
              id: boldAction
              text: "&Bold"
              iconSource: "images/textbold.png"
              iconName: "format-text-bold"
              onTriggered: document.bold = !document.bold
              checkable: true
              checked: document.bold
          }

          Action {
              id: italicAction
              text: "&Italic"
              iconSource: "images/textitalic.png"
              iconName: "format-text-italic"
              onTriggered: document.italic = !document.italic
              checkable: true
              checked: document.italic
          }
          Action {
              id: underlineAction
              text: "&Underline"
              iconSource: "images/textunder.png"
              iconName: "format-text-underline"
              onTriggered: document.underline = !document.underline
              checkable: true
              checked: document.underline
          }

          FileDialog {
              id: fileDialog
              nameFilters: ["Text files (*.txt)", "HTML files (*.html, *.htm)"]
              onAccepted: {
                  if (fileDialog.selectExisting)
                      document.fileUrl = fileUrl
                  else
                      document.saveAs(fileUrl, selectedNameFilter)
              }
          }

          ColorDialog {
              id: colorDialog
              color: "black"
          }

          Action {
              id: fileOpenAction
              iconSource: "images/fileopen.png"
              iconName: "document-open"
              text: "Open"
              onTriggered: {
                  fileDialog.selectExisting = true
                  fileDialog.open()
              }
          }

          Action {
              id: fileSaveAsAction
              iconSource: "images/filesave.png"
              iconName: "document-save"
              text: "Save As…"
              onTriggered: {
                  fileDialog.selectExisting = false
                  fileDialog.open()
              }
          }

          menuBar: MenuBar {
              Menu {
                  title: "&File"
                  MenuItem { action: fileOpenAction }
                  MenuItem { action: fileSaveAsAction }
                  MenuItem { text: "Quit"; onTriggered: Qt.quit() }
              }
              Menu {
                  title: "&Edit"
                  MenuItem { action: copyAction }
                  MenuItem { action: cutAction }
                  MenuItem { action: pasteAction }
              }
              Menu {
                  title: "F&ormat"
                  MenuItem { action: boldAction }
                  MenuItem { action: italicAction }
                  MenuItem { action: underlineAction }
                  MenuSeparator {}
                  MenuItem { action: alignLeftAction }
                  MenuItem { action: alignCenterAction }
                  MenuItem { action: alignRightAction }
                  MenuItem { action: alignJustifyAction }
                  MenuSeparator {}
                  MenuItem {
                      text: "&Color ..."
                      onTriggered: {
                          colorDialog.color = document.textColor
                          colorDialog.open()
                      }
                  }
              }
              Menu {
                  title: "&Help"
                  MenuItem { text: "About..." ; onTriggered: aboutBox.open() }
              }
          }

          toolBar: ToolBar {
              id: mainToolBar
              width: parent.width
              RowLayout {
                  anchors.fill: parent
                  spacing: 0
                  ToolButton { action: fileOpenAction }

                  ToolBarSeparator {}

                  ToolButton { action: copyAction }
                  ToolButton { action: cutAction }
                  ToolButton { action: pasteAction }

                  ToolBarSeparator {}

                  ToolButton { action: boldAction }
                  ToolButton { action: italicAction }
                  ToolButton { action: underlineAction }

                  ToolBarSeparator {}

                  ToolButton { action: alignLeftAction }
                  ToolButton { action: alignCenterAction }
                  ToolButton { action: alignRightAction }
                  ToolButton { action: alignJustifyAction }

                  ToolBarSeparator {}

                  ToolButton {
                      id: colorButton
                      property var color : document.textColor
                      Rectangle {
                          id: colorRect
                          anchors.fill: parent
                          anchors.margins: 8
                          color: Qt.darker(document.textColor, colorButton.pressed ? 1.4 : 1)
                          border.width: 1
                          border.color: Qt.darker(colorRect.color, 2)
                      }
                      onClicked: {
                          colorDialog.color = document.textColor
                          colorDialog.open()
                      }
                  }
                  Item { Layout.fillWidth: true }
              }
          }

          ToolBar {
              id: secondaryToolBar
              width: parent.width

              RowLayout {
                  anchors.fill: parent
                  ComboBox {
                      id: fontFamilyComboBox
                      implicitWidth: 150
                      model: Qt.fontFamilies()
                      property bool special : false
                      onActivated: {
                          if (special == false || index != 0) {
                              document.fontFamily = textAt(index)
                          }
                      }
                  }
                  SpinBox {
                      id: fontSizeSpinBox
                      activeFocusOnPress: false
                      implicitWidth: 50
                      value: 0
                      property bool valueGuard: true
                      onValueChanged: if (valueGuard) document.fontSize = value
                  }
                  Item { Layout.fillWidth: true }
              }
          }

          TextArea {
              Accessible.name: "document"
              id: textArea
              frameVisible: false
              width: parent.width
              anchors.top: secondaryToolBar.bottom
              anchors.bottom: parent.bottom
              baseUrl: "qrc:/"
              text: document.text
              textFormat: Qt.RichText
              Component.onCompleted: forceActiveFocus()
          }

          MessageDialog {
              id: errorDialog
          }

          DocumentHandler {
              id: document
              target: textArea
              cursorPosition: textArea.cursorPosition
              selectionStart: textArea.selectionStart
              selectionEnd: textArea.selectionEnd
              textColor: colorDialog.color
              Component.onCompleted: document.fileUrl = "qrc:/example.html"
              onFontSizeChanged: {
                  fontSizeSpinBox.valueGuard = false
                  fontSizeSpinBox.value = document.fontSize
                  fontSizeSpinBox.valueGuard = true
              }
              onFontFamilyChanged: {
                  var index = Qt.fontFamilies().indexOf(document.fontFamily)
                  if (index == -1) {
                      fontFamilyComboBox.currentIndex = 0
                      fontFamilyComboBox.special = true
                  } else {
                      fontFamilyComboBox.currentIndex = index
                      fontFamilyComboBox.special = false
                  }
              }
              onError: {
                  errorDialog.text = message
                  errorDialog.visible = true
              }
          }
      }