The TextEdit item displays multiple lines of editable formatted text. 更多...
| Since: | Qt 4.7 |
| 继承： | Item |
The TextEdit item displays a block of editable, formatted text.
它可以显示纯文本和富文本。例如：
TextEdit { width: 240 text: "<b>Hello</b> <i>World!</i>" font.family: "Helvetica" font.pointSize: 20 color: "blue" focus: true }
设置
focus
to
true
启用
TextEdit
item to receive keyboard focus.
注意， TextEdit does not implement scrolling, following the cursor, or other behaviors specific to a look-and-feel. For example, to add flickable scrolling that follows the cursor:
Flickable { id: flick width: 300; height: 200; contentWidth: edit.paintedWidth contentHeight: edit.paintedHeight 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 onCursorRectangleChanged: flick.ensureVisible(cursorRectangle) } }
A particular look-and-feel might use smooth scrolling (eg. using SmoothedFollow), might have a visible scrollbar, or a scrollbar that fades in to show location, etc.
Clipboard support is provided by the cut() , copy() ，和 paste() functions, and the selection can be handled in a traditional "mouse" mechanism by setting selectByMouse , or handled completely from QML by manipulating selectionStart and selectionEnd ，或使用 selectAll() or selectWord() .
You can translate between cursor positions (characters from the start of the document) and pixel points using positionAt() and positionToRectangle() .
另请参阅 Text , TextInput ，和 Text Selection example .
是否 TextEdit should gain active focus on a mouse press. By default this is set to true.
返回 true 若 TextEdit is writable and the content of the clipboard is suitable for pasting into the TextEdit .
This QML property was introduced in QtQuick 1.1.
文本颜色。
// green text using hexadecimal notation TextEdit { color: "#00FF00" }
// steelblue text using SVG color name TextEdit { color: "steelblue" }
|
cursorDelegate : Component |
The delegate for the cursor in the TextEdit .
If you set a cursorDelegate for a TextEdit , this delegate will be used for drawing the cursor instead of the standard cursor. An instance of the delegate will be created and managed by the text edit when a cursor is needed, and the x and y properties of delegate instance will be set so as to be one pixel before the top left of the current character.
Note that the root item of the delegate component must be a QDeclarativeItem or QDeclarativeItem derived item.
The position of the cursor in the TextEdit .
The rectangle where the text cursor is rendered within the text edit. Read-only.
If true the text edit shows a cursor.
This property is set and unset when the text edit gets active focus, but it can also be set directly (useful, for example, if a KeyProxy might forward keys to it).
Sets whether the font weight is bold.
Sets the capitalization for the text.
TextEdit { text: "Hello"; font.capitalization: Font.AllLowercase }
Sets the family name of the font.
The family name is case insensitive and may optionally include a foundry name, e.g. "Helvetica [Cronyx]". If the family is available from more than one foundry and the foundry isn't specified, an arbitrary foundry is chosen. If the family isn't available a family will be set using the font matching algorithm.
Sets whether the font has an italic style.
Sets the letter spacing for the font.
Letter spacing changes the default spacing between individual letters in the font. A positive value increases the letter spacing by the corresponding pixels; a negative value decreases the spacing.
Sets the font size in pixels.
使用此函数使字体设备从属。使用 TextEdit::font.pointSize to set the size of the font in a device independent manner.
Sets the font size in points. The point size must be greater than zero.
Sets whether the font has a strikeout style.
Sets whether the text is underlined.
Sets the font's weight.
The weight can be one of:
TextEdit { text: "Hello"; font.weight: Font.DemiBold }
Sets the word spacing for the font.
单词间距改变单个单词之间的默认间距。正值按相应像素数量递增单词间距，而负值相应递减单词间间距。
Sets the horizontal and vertical alignment of the text within the TextEdit item's width and height. By default, the text alignment follows the natural alignment of the text, for example text that is read from left to right will be aligned to the left.
Valid values for
horizontalAlignment
是：
Valid values for
verticalAlignment
是：
When using the attached property
LayoutMirroring::enabled
to mirror application layouts, the horizontal alignment of text will also be mirrored. However, the property
horizontalAlignment
will remain unchanged. To query the effective horizontal alignment of
TextEdit
, use the property
LayoutMirroring::enabled
.
This property holds whether the TextEdit has partial text input from an input method.
While it is composing an input method may rely on mouse or key events from the TextEdit to edit or commit the partial text. This property can be used to determine when to disable events handlers that may interfere with the correct operation of an input method.
This QML property was introduced in QtQuick 1.1.
Returns the total number of lines in the textEdit item.
This QML property was introduced in QtQuick 1.1.
Specifies how text should be selected using a mouse.
This property only applies when selectByMouse 为 true。
This QML property was introduced in QtQuick 1.1.
Returns the height of the text, including the height past the height that is covered if the text does not fit within the set height.
Returns the width of the text, including the width past the width which is covered due to insufficient wrapping if wrapMode 有设置。
是否 TextEdit should keep the selection visible when it loses active focus to another item in the scene. By default this is set to true;
Whether the user an interact with the TextEdit item. If this property is set to true the text cannot be edited by user interaction.
By default this property is false.
Defaults to false.
If true, the user can use the mouse to select text in some platform-specific way. Note that for some platforms this may not be an appropriate interaction (eg. may conflict with how the text needs to behave inside a Flickable.
This read-only property provides the text currently selected in the text edit.
It is equivalent to the following snippet, but is faster and easier to use.
//myTextEdit is the id of the TextEdit myTextEdit.text.toString().substring(myTextEdit.selectionStart, myTextEdit.selectionEnd);
The selected text color, used in selections.
The text highlight color, used behind selections.
The cursor position after the last character in the current selection.
This property is read-only. To change the selection, use select(start,end), selectAll() ，或 selectWord() .
另请参阅 selectionStart , cursorPosition ，和 selectedText .
The cursor position before the first character in the current selection.
This property is read-only. To change the selection, use select(start,end), selectAll() ，或 selectWord() .
另请参阅 selectionEnd , cursorPosition ，和 selectedText .
This property holds whether the text is smoothly scaled or transformed.
Smooth filtering gives better visual quality, but is slower. If the item is displayed at its natural size, this property has no visual or performance effect.
注意： Generally scaling artifacts are only visible if the item is stationary on the screen. A common pattern when animating an item is to disable smooth filtering at the beginning of the animation and reenable it at the conclusion.
The text to display. If the text format is AutoText the text edit will automatically determine whether the text should be treated as rich text. This determination is made using Qt::mightBeRichText().
The way the text property should be displayed.
默认为 TextEdit .AutoText. If the text format is TextEdit .AutoText the text edit will automatically determine whether the text should be treated as rich text. This determination is made using Qt::mightBeRichText().
Column { TextEdit { font.pointSize: 24 text: "<b>Hello</b> <i>World!</i>" } TextEdit { font.pointSize: 24 textFormat: TextEdit.RichText text: "<b>Hello</b> <i>World!</i>" } TextEdit { font.pointSize: 24 textFormat: TextEdit.PlainText text: "<b>Hello</b> <i>World!</i>" } } |
|
Sets the horizontal and vertical alignment of the text within the TextEdit item's width and height. By default, the text alignment follows the natural alignment of the text, for example text that is read from left to right will be aligned to the left.
Valid values for
horizontalAlignment
是：
Valid values for
verticalAlignment
是：
When using the attached property
LayoutMirroring::enabled
to mirror application layouts, the horizontal alignment of text will also be mirrored. However, the property
horizontalAlignment
will remain unchanged. To query the effective horizontal alignment of
TextEdit
, use the property
LayoutMirroring::enabled
.
Set this property to wrap the text to the TextEdit item's width. The text will only wrap if an explicit width has been set.
默认为 TextEdit .NoWrap. If you set a width, consider using TextEdit .Wrap.
This handler is called when the user clicks on a link embedded in the text. The link must be in rich text or HTML format and the link string provides access to the particular link.
This QML signal was introduced in QtQuick 1.1.
|
void closeSoftwareInputPanel () |
Closes a software input panel like a virtual keyboard shown on the screen, useful for customizing when you want the input keyboard to be shown and hidden in your application.
By default the opening of input panels follows the platform style. On Symbian^1 and Symbian^3 -based devices the panels are opened by clicking TextEdit . On other platforms the panels are automatically opened when TextEdit element gains active focus. Input panels are always closed if no editor has active focus.
You can disable the automatic behavior by setting the property
activeFocusOnPress
to false and use functions
openSoftwareInputPanel()
and closeSoftwareInputPanel() to implement the behavior you want.
Only relevant on platforms, which provide virtual keyboards.
import QtQuick 1.0 TextEdit { id: textEdit text: "Hello world!" activeFocusOnPress: false MouseArea { anchors.fill: parent onClicked: { if (!textEdit.activeFocus) { textEdit.forceActiveFocus(); textEdit.openSoftwareInputPanel(); } else { textEdit.focus = false; } } onPressAndHold: textEdit.closeSoftwareInputPanel(); } }
Copies the currently selected text to the system clipboard.
Moves the currently selected text to the system clipboard.
|
void deselect () |
Removes active text selection.
This QML method was introduced in QtQuick 1.1.
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void isRightToLeft ( int start , int end ) |
Returns true if the natural reading direction of the editor text found between positions start and end is right to left.
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void moveCursorSelection ( int position , SelectionMode mode = TextEdit.SelectCharacters) |
把光标移至 position and updates the selection according to the optional mode parameter. (To only move the cursor, set the cursorPosition property.)
When this method is called it additionally sets either the selectionStart 或 selectionEnd (whichever was at the previous cursor position) to the specified position. This allows you to easily extend and contract the selected text range.
The selection mode specifies whether the selection is updated on a per character or a per word basis. If not specified the selection mode will default to TextEdit .SelectCharacters.
For example, take this sequence of calls:
cursorPosition = 5 moveCursorSelection(9, TextEdit.SelectCharacters) moveCursorSelection(7, TextEdit.SelectCharacters)
This moves the cursor to position 5, extend the selection end from 5 to 9 and then retract the selection end from 9 to 7, leaving the text from position 5 to 7 selected (the 6th and 7th characters).
The same sequence with TextEdit .SelectWords will extend the selection start to a word boundary before or on position 5 and extend the selection end to a word boundary on or past position 9.
This QML method was introduced in QtQuick 1.1.
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void openSoftwareInputPanel () |
Opens software input panels like virtual keyboards for typing, useful for customizing when you want the input keyboard to be shown and hidden in your application.
By default the opening of input panels follows the platform style. On Symbian^1 and Symbian^3 -based devices the panels are opened by clicking TextEdit . On other platforms the panels are automatically opened when TextEdit element gains active focus. Input panels are always closed if no editor has active focus.
You can disable the automatic behavior by setting the property
activeFocusOnPress
to false and use functions openSoftwareInputPanel() and
closeSoftwareInputPanel()
to implement the behavior you want.
Only relevant on platforms, which provide virtual keyboards.
import QtQuick 1.0 TextEdit { id: textEdit text: "Hello world!" activeFocusOnPress: false MouseArea { anchors.fill: parent onClicked: { if (!textEdit.activeFocus) { textEdit.forceActiveFocus(); textEdit.openSoftwareInputPanel(); } else { textEdit.focus = false; } } onPressAndHold: textEdit.closeSoftwareInputPanel(); } }
Replaces the currently selected text by the contents of the system clipboard.
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int positionAt ( int x , int y ) |
Returns the text position closest to pixel position ( x , y ).
Position 0 is before the first character, position 1 is after the first character but before the second, and so on until position text .length, which is after all characters.
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rectangle positionToRectangle ( position ) |
Returns the rectangle at the given position in the text. The x, y, and height properties correspond to the cursor that would describe that position.
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void select ( int start , int end ) |
Causes the text from start to end to be selected.
If either start or end is out of range, the selection is not changed.
After calling this, selectionStart will become the lesser and selectionEnd will become the greater (regardless of the order passed to this method).
另请参阅 selectionStart and selectionEnd .
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void selectAll () |
Causes all text to be selected.
|
void selectWord () |
Causes the word closest to the current cursor position to be selected.
