FileChooserT.connectUpdatePreview

Connect to UpdatePreview signal.

This signal is emitted when the preview in a file chooser should be regenerated. For example, this can happen when the currently selected file changes. You should use this signal if you want your file chooser to have a preview widget.

Once you have installed a preview widget with gtk.file_chooser.FileChooser.setPreviewWidget, you should update it when this signal is emitted. You can use the functions gtk.file_chooser.FileChooser.getPreviewFilename or gtk.file_chooser.FileChooser.getPreviewUri to get the name of the file to preview. Your widget may not be able to preview all kinds of files; your callback must call gtk.file_chooser.FileChooser.setPreviewWidgetActive to inform the file chooser about whether the preview was generated successfully or not.

Please see the example code in [Using a Preview Widget][gtkfilechooser-preview].

template FileChooserT()

gulong

connectUpdatePreview

(

)

(

T callback

Flag!"After" after = No.After

)

if (

isCallable!T &&

is(ReturnType!T == void)

(

Parameters!T.length < 1 ||

(

ParameterStorageClassTuple!T[0] == ParameterStorageClass.none &&

is(Parameters!T[0] : gtk.file_chooser.FileChooser)

)

Parameters!T.length < 2

)

Parameters

callback T: signal callback delegate or function to connect
void callback(gtk.file_chooser.FileChooser fileChooser)
fileChooser the instance the signal is connected to (optional)
after Flag!"After": Yes.After to execute callback after default handler, No.After to execute before (default)

Return Value

Type: gulong

Signal ID