CODEWITHSUNDEEP
javaswt
raisercostin
raisercostin

Reputation: 9189

On Windows 7 SWT 4.3 setSelection doesn't move the caret at end of text

I have the following Text in swt. I'm trying to display in a text widget a specific text and move the caret to the end just in case the user wants to add something.

The problem is that the caret is always before last character and not after

    text = new Text(group, SWT.BORDER);
    text.addListener(SWT.KeyDown, e -> {
        if (e.keyCode == SWT.ARROW_UP) {
            String prevText = "some text from history";
            text.setText(prevText);
            text.setSelection(prevText.length());
            //This doesn't work either: caret is stil before last character
            //text.setSelection(prevText.length()+10);
        }
    });

More details:

Windows7
swt-4.3
SWT-OS: win32
SWT-WS: win32
SWT-Arch: x86_64

On an OSX it behaves properly.

Upvotes: 2

Views: 166

Answers (2)

Baz
Baz

Reputation: 36894

On Windows, using the ▲ and ▼ arrow keys will move the caret left or right.

This only applies to single line Text widgets though.

So this is very much the intended behaviour and not a bug.

Upvotes: 2

Rüdiger Herrmann
Rüdiger Herrmann

Reputation: 20985

I can confirm your observation running the snippet with SWT 3.106 (as shipped with Eclipse 4.6) on Windows 7.

It is the Up key that changes the position of the caret to the before-last character. On Windows, the Up and Down keys change the cursor position to the left and right respectively. To prevent that from happening you need to stop the Text widget from consuming the key event with 

event.doit = false;

This issue only applies to single-line text input fields. If a Text is created with new Text( parent, SWT.MULTI ), setting the selection works as expected.

Alternatively, for single-line text input fields, use the overloaded setSelection(in,int) or setSelection(Point) method. For example:

int selection = text1.getText().length() + 1;
text1.setSelection( selection, selection );

Upvotes: 3

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