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Entry from ComboBoxText

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Gerald Nunn
Posted Thu, 12 Nov 2015 19:20:59 GMT
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I'm trying to get the Entry from a ComboBoxText as I need it to show text which is not in the list, calling setActiveText just sets the Entry to the first item. I tried the following code, but am getting a Seg Fault, on the cast to Entry, what am I doing wrong?

When I look at it with a debugger, widget looks like a valid object. The GTK docs say to use gtkbinget_child which is what the getChild is doing in Bin.d. 

Widget widget = cbPath.getChild();
if (widget !is null) {
	Entry entry = cast(Entry) widget;
	entry.setText(dialog.getFilename());
}

Re: Entry from ComboBoxText

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Mike Wey
Posted Thu, 12 Nov 2015 23:07:20 +0100 in reply to Gerald Nunn
Reply

On 11/12/2015 08:20 PM, Gerald Nunn wrote:

I'm trying to get the Entry from a ComboBoxText as I need it to show text which is not in the list, calling setActiveText just sets the Entry to the first item. I tried the following code, but am getting a Seg Fault, on the cast to Entry, what am I doing wrong?

When I look at it with a debugger, widget looks like a valid object. The GTK docs say to use gtkbinget_child which is what the getChild is doing in Bin.d. 

Widget widget = cbPath.getChild();
if (widget !is null) {
	Entry entry = cast(Entry) widget;
	entry.setText(dialog.getFilename());
}

As a workaround the following should work: 

Widget widget = cbPath.getChild();
if (widget !is null) {
	Entry entry = new Entry(widget.getWidgetStruct());
	entry.setText(dialog.getFilename());
}

Re: Entry from ComboBoxText

avatar
Gerald Nunn
Posted Fri, 13 Nov 2015 14:53:48 GMT in reply to Mike Wey
Reply

On Thu, 12 Nov 2015 23:07:20 +0100, Mike Wey wrote:

As a workaround the following should work: 

Widget widget = cbPath.getChild();
if (widget !is null) {
	Entry entry = new Entry(widget.getWidgetStruct());
	entry.setText(dialog.getFilename());
}

Thanks Mike, I had to make one small change to case the entry struct to GtkEntry as per the code below and it worked fine. Might be nice to include a convenience function in the future for this though I see gtk itself doesn't exactly make this intuitive either. 

Widget widget = cbPath.getChild();
if (widget !is null) {
	Entry entry = new Entry(cast(GtkEntry*)widget.getWidgetStruct());
	entry.setText(dialog.getFilename());
}

Re: Entry from ComboBoxText

avatar
Ron Tarrant
Posted Thu, 09 May 2019 13:28:36 GMT in reply to Gerald Nunn
Reply

On Thu, 12 Nov 2015 19:20:59 GMT, Gerald Nunn wrote:

I'm trying to get the Entry from a ComboBoxText as I need it to show text which is not in the list, calling setActiveText just sets the Entry to the first item. I tried the following code, but am getting a Seg Fault, on the cast to Entry, what am I doing wrong?

When I look at it with a debugger, widget looks like a valid object. The GTK docs say to use gtkbinget_child which is what the getChild is doing in Bin.d. 

Widget widget = cbPath.getChild();
if (widget !is null) {
	Entry entry = cast(Entry) widget;
	entry.setText(dialog.getFilename());
}

For anyone running into this now (ie. post-May 2019) the above cast() now works. Thanks to all the guys (probably just Mike) who keep GtkD up to date.