Qt 5.8 | Qt Quick Controls 2 | Qt Quick Controls 2 - Text Editor | texteditor.qml Example File

Qt 5.8.0 Reference Documentation

# texteditor.qml Example File

texteditor/qml/texteditor.qml

      /****************************************************************************
      **
      ** Copyright (C) 2016 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 2.8
      import QtQuick.Controls 2.1
      import QtQuick.Window 2.0
      import Qt.labs.platform 1.0

      import io.qt.examples.texteditor 1.0

      // TODO:
      // - make designer-friendly

      ApplicationWindow {
          id: window
          width: 1024
          height: 600
          visible: true
          title: document.fileName + " - Text Editor Example"

          Component.onCompleted: {
              x = Screen.width / 2 - width / 2
              y = Screen.height / 2 - height / 2
          }

          Shortcut {
              sequence: StandardKey.Open
              onActivated: openDialog.open()
          }
          Shortcut {
              sequence: StandardKey.SaveAs
              onActivated: saveDialog.open()
          }
          Shortcut {
              sequence: StandardKey.Quit
              onActivated: Qt.quit()
          }
          Shortcut {
              sequence: StandardKey.Copy
              onActivated: textArea.copy()
          }
          Shortcut {
              sequence: StandardKey.Cut
              onActivated: textArea.cut()
          }
          Shortcut {
              sequence: StandardKey.Paste
              onActivated: textArea.paste()
          }
          Shortcut {
              sequence: StandardKey.Bold
              onActivated: document.bold = !document.bold
          }
          Shortcut {
              sequence: StandardKey.Italic
              onActivated: document.italic = !document.italic
          }
          Shortcut {
              sequence: StandardKey.Underline
              onActivated: document.underline = !document.underline
          }

          MenuBar {
              Menu {
                  title: qsTr("&File")

                  MenuItem {
                      text: qsTr("&Open")
                      onTriggered: openDialog.open()
                  }
                  MenuItem {
                      text: qsTr("&Save As...")
                      onTriggered: saveDialog.open()
                  }
                  MenuItem {
                      text: qsTr("&Quit")
                      onTriggered: Qt.quit()
                  }
              }

              Menu {
                  title: qsTr("&Edit")

                  MenuItem {
                      text: qsTr("&Copy")
                      enabled: textArea.selectedText
                      onTriggered: textArea.copy()
                  }
                  MenuItem {
                      text: qsTr("Cu&t")
                      enabled: textArea.selectedText
                      onTriggered: textArea.cut()
                  }
                  MenuItem {
                      text: qsTr("&Paste")
                      enabled: textArea.canPaste
                      onTriggered: textArea.paste()
                  }
              }

              Menu {
                  title: qsTr("F&ormat")

                  MenuItem {
                      text: qsTr("&Bold")
                      checkable: true
                      checked: document.bold
                      onTriggered: document.bold = !document.bold
                  }
                  MenuItem {
                      text: qsTr("&Italic")
                      checkable: true
                      checked: document.italic
                      onTriggered: document.italic = !document.italic
                  }
                  MenuItem {
                      text: qsTr("&Underline")
                      checkable: true
                      checked: document.underline
                      onTriggered: document.underline = !document.underline
                  }
              }
          }

          FileDialog {
              id: openDialog
              fileMode: FileDialog.OpenFile
              selectedNameFilter.index: 1
              nameFilters: ["Text files (*.txt)", "HTML files (*.html *.htm)"]
              folder: StandardPaths.writableLocation(StandardPaths.DocumentsLocation)
              onAccepted: document.load(file)
          }

          FileDialog {
              id: saveDialog
              fileMode: FileDialog.SaveFile
              defaultSuffix: document.fileType
              nameFilters: openDialog.nameFilters
              selectedNameFilter.index: document.fileType === "txt" ? 0 : 1
              folder: StandardPaths.writableLocation(StandardPaths.DocumentsLocation)
              onAccepted: document.saveAs(file)
          }

          FontDialog {
              id: fontDialog
              onAccepted: {
                  document.fontFamily = font.family;
                  document.fontSize = font.pointSize;
              }
          }

          ColorDialog {
              id: colorDialog
              currentColor: "black"
          }

          MessageDialog {
              id: errorDialog
          }

          header: ToolBar {
              leftPadding: 8

              Flow {
                  id: flow
                  width: parent.width

                  Row {
                      id: fileRow
                      ToolButton {
                          id: openButton
                          text: "\uF115" // icon-folder-open-empty
                          font.family: "fontello"
                          onClicked: openDialog.open()
                      }
                      ToolSeparator {
                          contentItem.visible: fileRow.y === editRow.y
                      }
                  }

                  Row {
                      id: editRow
                      ToolButton {
                          id: copyButton
                          text: "\uF0C5" // icon-docs
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          enabled: textArea.selectedText
                          onClicked: textArea.copy()
                      }
                      ToolButton {
                          id: cutButton
                          text: "\uE802" // icon-scissors
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          enabled: textArea.selectedText
                          onClicked: textArea.cut()
                      }
                      ToolButton {
                          id: pasteButton
                          text: "\uF0EA" // icon-paste
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          enabled: textArea.canPaste
                          onClicked: textArea.paste()
                      }
                      ToolSeparator {
                          contentItem.visible: editRow.y === formatRow.y
                      }
                  }

                  Row {
                      id: formatRow
                      ToolButton {
                          id: boldButton
                          text: "\uE800" // icon-bold
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          checkable: true
                          checked: document.bold
                          onClicked: document.bold = !document.bold
                      }
                      ToolButton {
                          id: italicButton
                          text: "\uE801" // icon-italic
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          checkable: true
                          checked: document.italic
                          onClicked: document.italic = !document.italic
                      }
                      ToolButton {
                          id: underlineButton
                          text: "\uF0CD" // icon-underline
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          checkable: true
                          checked: document.underline
                          onClicked: document.underline = !document.underline
                      }
                      ToolButton {
                          id: fontFamilyToolButton
                          text: qsTr("\uE808") // icon-font
                          font.family: "fontello"
                          font.bold: document.bold
                          font.italic: document.italic
                          font.underline: document.underline
                          onClicked: {
                              fontDialog.currentFont.family = document.fontFamily;
                              fontDialog.currentFont.pointSize = document.fontSize;
                              fontDialog.open();
                          }
                      }
                      ToolButton {
                          id: textColorButton
                          text: "\uF1FC" // icon-brush
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          onClicked: colorDialog.open()

                          Rectangle {
                              width: aFontMetrics.width + 3
                              height: 2
                              color: document.textColor
                              parent: textColorButton.contentItem
                              anchors.horizontalCenter: parent.horizontalCenter
                              anchors.baseline: parent.baseline
                              anchors.baselineOffset: 6

                              TextMetrics {
                                  id: aFontMetrics
                                  font: textColorButton.font
                                  text: textColorButton.text
                              }
                          }
                      }
                      ToolSeparator {
                          contentItem.visible: formatRow.y === alignRow.y
                      }
                  }

                  Row {
                      id: alignRow
                      ToolButton {
                          id: alignLeftButton
                          text: "\uE803" // icon-align-left
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          checkable: true
                          checked: document.alignment == Qt.AlignLeft
                          onClicked: document.alignment = Qt.AlignLeft
                      }
                      ToolButton {
                          id: alignCenterButton
                          text: "\uE804" // icon-align-center
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          checkable: true
                          checked: document.alignment == Qt.AlignHCenter
                          onClicked: document.alignment = Qt.AlignHCenter
                      }
                      ToolButton {
                          id: alignRightButton
                          text: "\uE805" // icon-align-right
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          checkable: true
                          checked: document.alignment == Qt.AlignRight
                          onClicked: document.alignment = Qt.AlignRight
                      }
                      ToolButton {
                          id: alignJustifyButton
                          text: "\uE806" // icon-align-justify
                          font.family: "fontello"
                          focusPolicy: Qt.TabFocus
                          checkable: true
                          checked: document.alignment == Qt.AlignJustify
                          onClicked: document.alignment = Qt.AlignJustify
                      }
                  }
              }
          }

          DocumentHandler {
              id: document
              document: textArea.textDocument
              cursorPosition: textArea.cursorPosition
              selectionStart: textArea.selectionStart
              selectionEnd: textArea.selectionEnd
              textColor: colorDialog.color
              Component.onCompleted: document.load("qrc:/texteditor.html")
              onLoaded: {
                  textArea.text = text
              }
              onError: {
                  errorDialog.text = message
                  errorDialog.visible = true
              }
          }

          Flickable {
              id: flickable
              flickableDirection: Flickable.VerticalFlick
              anchors.fill: parent

              TextArea.flickable: TextArea {
                  id: textArea
                  textFormat: Qt.RichText
                  wrapMode: TextArea.Wrap
                  focus: true
                  selectByMouse: true
                  persistentSelection: true
                  // Different styles have different padding and background
                  // decorations, but since this editor is almost taking up the
                  // entire window, we don't need them.
                  leftPadding: 6
                  rightPadding: 6
                  topPadding: 0
                  bottomPadding: 0
                  background: null

                  MouseArea {
                      acceptedButtons: Qt.RightButton
                      anchors.fill: parent
                      onClicked: contextMenu.open()
                  }

                  onLinkActivated: Qt.openUrlExternally(link)
              }

              ScrollBar.vertical: ScrollBar {}
          }

          Menu {
              id: contextMenu

              MenuItem {
                  text: qsTr("Copy")
                  enabled: textArea.selectedText
                  onTriggered: textArea.copy()
              }
              MenuItem {
                  text: qsTr("Cut")
                  enabled: textArea.selectedText
                  onTriggered: textArea.cut()
              }
              MenuItem {
                  text: qsTr("Paste")
                  enabled: textArea.canPaste
                  onTriggered: textArea.paste()
              }

              MenuSeparator {}

              MenuItem {
                  text: qsTr("Font...")
                  onTriggered: fontDialog.open()
              }

              MenuItem {
                  text: qsTr("Color...")
                  onTriggered: colorDialog.open()
              }
          }
      }