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我如何剪切，复制，粘贴和在TextView控件选择呢？

分类: 技术问答 • 2022-07-24 17:33:21
问题描述：

我想剪切，复制，粘贴和TextView的基于GTK控件中选择所有。为什么TextView控件？ ！因为我似乎无法得到血腥文本编辑控制去多行

I'm trying to cut, copy, paste and select all with the TextView Gtk control. Why the TextView control? Cause I can't seem to get the bloody TextEditor control to go multiline!

反正...我如何：

剪切从TextView控件的文字？

Cut text from the TextView control?

复制从TextView控件的文字？

Copy text from the TextView control?

粘贴文本到TextView控件？

Paste text into the TextView control?

选 ？在TextView控件文本

Select All text in the TextView control?


以下是我已经试过：
1小时谷歌搜索

Here's what I've tried: 1 hour of googling.

和这样的：

TextView tv = ...;
TextIter start, end;
if (tv.Buffer.GetSelectionBounds(start, end)) {
  String selected = tv.Buffer.GetText(start, end);
  Clipboard clipboard = tv.GetClipboard(Gdk.Selection.Clipboard);
  clipboard.Text = selected;
}



来自：的 GTK＃TextView的复制和粘贴 - ？。但是这显然是行不通的（因此我的问题）

from: GTK# textview copy and paste? - but that obviously doesn't work (hence my question).

我也发现了这一点： http://docs.go-mono.com/ ？链接= T％3aGtk.TextView Mono的GTK C＃文档。有，只是似乎是不存在的这么多东西。

I've also found this: http://docs.go-mono.com/?link=T%3aGtk.TextView The Mono GTK C# docs. There is so much stuff that just seems to be non-existent.

答

基本上你应该有潜在 TextBuffer 从的TextView 。

Basically you should work with Underlying TextBuffer from your TextView.

要剪切，复制和粘贴，首先，我们应该选择我们打算复制一部分（或检查，看看如果缓冲区已经有一些选择或没有），选择一部分，我们应该得到的Iterator键入 TextIter 从缓冲区，这里是我们如何能做到这一点：

To Cut, Copy and Paste, First we should select the part we intended to Copy (or check and see if the buffer already has some selection or not), to select a part we should get an Iterator of type TextIter from buffer, here is how we can do it:

下面是对于全选的例子 

var start = textview.Buffer.GetIterAtOffset (0);

var end = textview.Buffer.GetIterAtOffset (0);
end.ForwardToEnd ();

textview.Buffer.SelectRange (start, end);

下面是一个例子，是从文本选择范围[2,4]：

Here is an example is for selecting range [2,4] from text:

var start = textview.Buffer.GetIterAtOffset (0);
start.ForwardChars (2);

var end = textview.Buffer.GetIterAtOffset (0);
end.ForwardChars (4);

textview.Buffer.SelectRange (start, end);



TextIter 有范围选择广泛的方法例如 ForwardChars（）有一个双胞胎的方法 BackwardChars（）。

TextIter have extensive methods for range selection for example ForwardChars() has a twin method BackwardChars().

要检查我们的 TextBuffer 有我们应该使用 HasSelection 属性的选择：

To check if our TextBuffer has any selection we should use HasSelection Property:

var hasSelection = textview.Buffer.HasSelection;



剪贴板


$ B $工作b

现在，我们。有一个选定的文本，我们可以简单地用剪贴板操作使用它

Working with Clipboard

Now that we have a selected text we can simply use it with Clipboard actions.

下面是一个示例的切割选择的范围[2,4]：

Here is a sample for Cutting selected range [2,4]:

 var clipboard = textview.GetClipboard (Gdk.Selection.Clipboard);

var start = textview.Buffer.GetIterAtOffset (0);
start.ForwardChars (2);

var end = textview.Buffer.GetIterAtOffset (0);
end.ForwardChars (4);

textview.Buffer.SelectRange (start, end);

textview.Buffer.CutClipboard (clipboard, true);



复制非常相似的切割：我们应该只替换 CutClipboard 与 CopyClipboard ：

Copying is very similar to Cutting we should only replace CutClipboard with CopyClipboard :

下面是对样品的复制选择的范围[2,4]：

Here is a sample for Copying selected range [2,4]:

 var clipboard = textview.GetClipboard (Gdk.Selection.Clipboard);

var start = textview.Buffer.GetIterAtOffset (0);
start.ForwardChars (2);

var end = textview.Buffer.GetIterAtOffset (0);
end.ForwardChars (4);

textview.Buffer.SelectRange (start, end);

textview.Buffer.CopyClipboard (clipboard, true);

和最后的粘贴从剪贴板的东西非常相似的切割/复制

and finally Pasting something from clipboard is very similar to Cutting/Copying

下面是的粘贴一些文​​本从剪贴板位置0的例子：

Here is an example of Pasting some text from Clipboard to location 0:

var pasteLocation=textview.Buffer.GetIterAtOffset (0);
textview.Buffer.SelectRange (pasteLocation, pasteLocation);

textview.Buffer.PasteClipboard (clipboard);



最后一个例子：



作为最后一个例如，我们从它设置文本为 123456 ，然后切 34 ，并在一开始粘贴，最后文本应该是这样的 341256 ：

Final Example:

As a final example, we set text to 123456 and then cut 34 from it and paste it at the beginning, the final text should be like 341256 :

void TextViewSample ()
{
    textview.Buffer.Text = "123456";
    var clipboard = textview.GetClipboard (Gdk.Selection.Clipboard);
    var start = textview.Buffer.GetIterAtOffset (0);
    start.ForwardChars (2);
    var end = textview.Buffer.GetIterAtOffset (0);
    end.ForwardChars (4);
    textview.Buffer.SelectRange (start, end);
    var hasSelection = textview.Buffer.HasSelection;
    textview.Buffer.CutClipboard (clipboard, true);
    var pasteLocation = textview.Buffer.GetIterAtOffset (0);
    textview.Buffer.SelectRange (pasteLocation, pasteLocation);
    textview.Buffer.PasteClipboard (clipboard);
}

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