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Need to retrieve text behind cursor

SyntaxEditor for Windows Forms Forum

Posted 15 years ago by Nassim Farhat
Version: 4.0.0276
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Hello ActiPro team,

I have two quick questions.
Q1-
I need a dialog window to open up when I click on ctrl-B in the syntaxeditor control. SO I guess that this can be accomplshed using keypress events, if so do you have an example for this?

Q2- Also, I want to be able to press on ctrl-B and capture the text where the cursor is placed on and pass that text to my dialog in the keypress event. (just to let you know, I used dynamic grammer definition to get up and running fast)

SO, if I have such a code segment:

if (test == "sigma1")
{
int new_variable;
new_variable = 5;
}

And my cursor is on new_variable, I want to capture that text into a string and pass it to my dialog, is this easy to do? And if for example I have "new_variable=5" all stuck together, can the same thing be accomplished? Meaning that if the cursor is on new_variable it will capture only new_variable into a string and not the "=5" part?

Thank you for your time
nassim

Comments (7)

Posted 15 years ago by Actipro Software Support - Cleveland, OH, USA
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Nassim,

1) You could look at the KeyDown event for that key combination. KeyPress only does typed characters, KeyDown will do hotkeys like Ctrl+B. We don't have a sample but it's standard Windows Forms so you can find samples all over the web for that.

2) Try this: 
string text = editor.SelectedView.GetCurrentWordText();

Actipro Software Support

Posted 15 years ago by Nassim Farhat
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Thank you so much for your help,
Everything works perfectly as you said!

Regards
Nassim
Posted 15 years ago by Nassim Farhat
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Thanks for your hints from the last message.

I have another issue:
Right now I would like to select the word, highlighted and delete/replace it with a new text.

For the highlight I'm doing the following: 

  private void HighLightSelectedWord()
        {



            HighlightingStyle highlightingStyle = new HighlightingStyle("style", null, Color.Empty, Color.LightGray);

            // Create a layer
            SpanIndicatorLayer layer = new SpanIndicatorLayer("test", 1);
            this.STsyntaxEditor.Document.SpanIndicatorLayers.Add(layer);


            TextRange textRange = this.STsyntaxEditor.SelectedView.GetCurrentWordTextRange();

            // Create a highlight span indicator
            HighlightingStyleSpanIndicator indicator = new HighlightingStyleSpanIndicator("indicator", highlightingStyle);
            layer.Add(indicator, textRange);
        }
And then I call the following to delete the selected text: 

this.STsyntaxEditor.SelectedView.DeleteSelectedText(ActiproSoftware.SyntaxEditor.DocumentModificationType.Delete, ActiproSoftware.SyntaxEditor.DocumentModificationOptions.SelectInsertedText);
But It does not delete the word that I higlighted.

Would you have some hints on maybe a better way of doing this? Or maybe I'm way off?

Reagards
Nassim
Posted 15 years ago by Actipro Software Support - Cleveland, OH, USA
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Nassim,

I think you may be confusing some things. The "selection" is what is the blue highlighting as you select text with the mouse/keyboard and has nothing to do with span indicators. I think your span indicator code is unnecessary.

The EditorView.DeleteSelectedText only deletes any text that is currently selected, again not relating at all to the span indicators.

I would suggest you do something like this instead, which does a programmatic delete of some text: 
TextRange textRange = this.STsyntaxEditor.SelectedView.GetCurrentWordTextRange();
this.STSyntaxEditor.Document.DeleteText(DocumentModificationType.Delete, textRange);

Actipro Software Support

Posted 15 years ago by Nassim Farhat
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YEs...yes... that's exactly what I wanted to do. Wow, I was way off!
thank you so much for this. I got things working the way I wanted.

There was one more thing I was wondering though, how can I automatically highlight the word behind the cursor (i.e. make a blue highlighting of text selection which is represented by the word that the cursor is on)? So for that one, I'm pretty sure I have to use the spanindicator, so I did so, but after adding the "HighlightingStyleSpanIndicator" on my text range I'm unable Remove it afterwards!

I saw a post that said:

"The Document.Indicators collection has a GetSpanIndicatorsForOffset method that returns an array containing the SpanIndicator objects that contain the specified offset. Use that to know what indicators are at an offset."

But I was unable to find the Document.Indicators collection? Am I missing an assembly reference to get this?

Thanks again for your time
Nassim
Posted 15 years ago by Actipro Software Support - Cleveland, OH, USA
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If you mean text selection, then you'd do something like: 
editor.SelectedView.Selection.SelectRange(textRange);
Indicators are not needed for that, they are used for things like showing breakpoints, etc. Does this solve your problem?

Actipro Software Support

Posted 15 years ago by Nassim Farhat
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Wow, that was quick thank you for your support...

Acutally I found what could help me.

Like you said "Indicators are not needed for that", I went directly to the selection and did the following: 

TextRange textRange = this.STsyntaxEditor.SelectedView.GetCurrentWordTextRange();
this.STsyntaxEditor.SelectedView.Selection.SelectWord();
Fixed my issue perfectly!

Thanks again for your great support.

Regards
Nassim
The latest build of this product (v24.1.0) was released 2 months ago, which was after the last post in this thread.

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