C1 Community

Hi everybody!

Could anybody explain how the "PreviewAction" event of C1PreviewPane works?

What I want to achieve: I preview a C1FlexGridPrintable (a C1 flexgrid sample),
which is modified to scale the grid data based on the paper size. So, if the
page settings change, the zoom might have changed, and I have to recreate the
full C1FlexGridPrintable. Now I need a good extension point to plug in this
logic to the preview.
I thought that the "PreviewAction" event is fired when e.g. the PageSettings
Button is pressed, so that I could provide my own subclass of
"ActionHandlerReflow", but this does not seem to happen.

Does anybody have an idea on how to achieve what I want to do?

Thanks

Wolfgang

I don't think the toolbar buttons will trigger PreviewPane's PreviewAction event because they are part of the PrintPreviewControl base part. 

If you want to capture the user clicking on a toolbar button you can access the toolbar events through code...

AddHandler C1PrintPreviewControl1.ToolBars.File.ToolStrip.ItemClicked, AddressOf previewAction

Private Sub previewAction(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ToolStripItemClickedEventArgs)
   MsgBox(e.ClickedItem.ToolTipText)
End Sub

that might help

Greg L

 

 

Hi Greg,

this will not help much, because first the C1PrintPreviewControl default logic
would run, and after this I can handle the click. This would mean that the
document is rendered twice.

I think I need this feature for the page settings click, and I would like to do
this: use the default behaviour for showing the page settings dialog and setting
the new page settings to the current document. Then I want to re-render the
C1FlexGridPrintable with the new settings, and reflowing the document could
again be done by the default logic.
In my case, an event "PageSettingsChanged" of the preview control would help,
which is fired after showing the dialog and before re-rendering the document. Do
you think that something like this could be implemented? If yes I request to add
it to the wish list.

Best regards

Wolfgang

Could you do this using a custom button?  You would have to create your own page settings dialog and call it when clicking your own button.

I suggest emailing feedback@componentone.com with enhancements, or create a new thread which might be seen by the developers.

Regards,

Greg

I will give this a try and use a custom button. Hope there is not too much done
internally.

Thanks

Wolfgang

 To capture page settings' change, you can do this:

  C1PrintPreview pview = new C1PrintPreview();
  ...
  pview.PreviewPane.PropertyChanged += new PropertyChangedEventHandler(PreviewPane_PropertyChanged);
 

  void PreviewPane_PropertyChanged(object sender, PropertyChangedEventArgs e)
  {
    if (e.PropertyName == "PageSettings")
    {
      // your logic here
    }
  }

 

Note that all preview controls' properties fire the common PropertyChanged event when changed.

Hope this helps.
 

Thanks, Dima, this was a great tip. It did exactly what I needed!

Wolfgang

 Glad to help. Thanks for letting me know that it works for you.