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WaitCursor / hourglass in custom printpreview dialog

Author
18 Dec 2005 6:30 PM
Lars
Hi,

I have created a simple custom PrintPreviewDialog consisting of a simple
standard PrintPreviewControl (.NET 1.1) on a WindowsForm with a few buttons
(for printing, zooming, etc.).  It is working fine, except for that I cannot
figure out how display the waitcursor / hourglass while the preview is
preparing to show the document *and then go back to the default cursor when
the document is displayed*.  Turning on the waitcursor is easy, but what
event should I hook into to turn it off??

What happens when I preview a document that is about 50 pages long is that
you get the blank form on the screen and then nothing happens for maybe 40
seconds and then you get a "Generating Preview" message and then the
document is displayed.  It is during the initial 40 seconds that I need an
hourglass or something to let the users know that something is happening in
the background.

Here are some snippets of what I am doing currently:

// Constructor:
public PreviewDialog(System.Drawing.Printing.PrintDocument printDocument,
int zoom)
{
   InitializeComponent();
   _printDocument = printDocument;
   _zoom = zoom;
}

private void PreviewDialog_Load(object sender, System.EventArgs e)
{
   this.Cursor = Cursors.WaitCursor;
   Initialize();
   //this.Cursor = Cursors.Default;  // This gets hit instantly, so you
never see an hourglass.
}

private void Initialize()
{
   uxPrintPreview.Anchor = AnchorStyles.Bottom | AnchorStyles.Top |
AnchorStyles.Left | AnchorStyles.Right;
   uxPrintPreview.Zoom = zoom;
   this.WindowState = FormWindowState.Maximized;
   uxPrintPreview.Document = printDocument1 = printDocument;
}

// The calling code:
using (PreviewDialog form = new PreviewDialog(c1Report1.Document))
{
   form.ShowDialog(this);
}

If there was an event like LastPageFinished or DocumentRendered or similar
in the PrintPreviewControl, I would be home free, but I cannot find anything
like that.

Any help on this would be greatly appreciated.

Thanks,
Lars

Author
19 Dec 2005 5:16 PM
Martin Stainsby
>
> private void PreviewDialog_Load(object sender, System.EventArgs e)
> {
>   this.Cursor = Cursors.WaitCursor;
>   Initialize();
>   //this.Cursor = Cursors.Default;  // This gets hit instantly, so you
> never see an hourglass.
> }

You could try

Cursor.Current = Cursors.WaitCursor;

Seems to be ok when I tried it.
Author
19 Dec 2005 9:38 PM
Lars
Show quote
>> private void PreviewDialog_Load(object sender, System.EventArgs e)
>> {
>>   this.Cursor = Cursors.WaitCursor;
>>   Initialize();
>>   //this.Cursor = Cursors.Default;  // This gets hit instantly, so you
>> never see an hourglass.
>> }
>
> You could try
>
> Cursor.Current = Cursors.WaitCursor;
>
> Seems to be ok when I tried it.


No, that does not make a difference.  The problem is not to change to a
WaitCursor, but rather to know when to change it back to a default cursor.
For example, in my snippet above, I commented out "this.Cursor =
Cursors.Default" since it gets hit almost instantly (way before the page is
rendered), so you never see an hourglass.
Author
19 Dec 2005 9:17 PM
carion1
using (PreviewDialog form = new PreviewDialog(c1Report1.Document))
{
    this.Cursor = Cursors.WaitCursor;
    form.ShowDialog(this);
    this.Cursor = Cursors.Default;
}

--

Derek Davis
ddavi***@gmail.com

Show quote
"Lars" <nob***@dev.null> wrote in message
news:11qbaldcfhlic9f@corp.supernews.com...
> Hi,
>
> I have created a simple custom PrintPreviewDialog consisting of a simple
> standard PrintPreviewControl (.NET 1.1) on a WindowsForm with a few
> buttons (for printing, zooming, etc.).  It is working fine, except for
> that I cannot figure out how display the waitcursor / hourglass while the
> preview is preparing to show the document *and then go back to the default
> cursor when the document is displayed*.  Turning on the waitcursor is
> easy, but what event should I hook into to turn it off??
>
> What happens when I preview a document that is about 50 pages long is that
> you get the blank form on the screen and then nothing happens for maybe 40
> seconds and then you get a "Generating Preview" message and then the
> document is displayed.  It is during the initial 40 seconds that I need an
> hourglass or something to let the users know that something is happening
> in the background.
>
> Here are some snippets of what I am doing currently:
>
> // Constructor:
> public PreviewDialog(System.Drawing.Printing.PrintDocument printDocument,
> int zoom)
> {
>   InitializeComponent();
>   _printDocument = printDocument;
>   _zoom = zoom;
> }
>
> private void PreviewDialog_Load(object sender, System.EventArgs e)
> {
>   this.Cursor = Cursors.WaitCursor;
>   Initialize();
>   //this.Cursor = Cursors.Default;  // This gets hit instantly, so you
> never see an hourglass.
> }
>
> private void Initialize()
> {
>   uxPrintPreview.Anchor = AnchorStyles.Bottom | AnchorStyles.Top |
> AnchorStyles.Left | AnchorStyles.Right;
>   uxPrintPreview.Zoom = zoom;
>   this.WindowState = FormWindowState.Maximized;
>   uxPrintPreview.Document = printDocument1 = printDocument;
> }
>
> // The calling code:
> using (PreviewDialog form = new PreviewDialog(c1Report1.Document))
> {
>   form.ShowDialog(this);
> }
>
> If there was an event like LastPageFinished or DocumentRendered or similar
> in the PrintPreviewControl, I would be home free, but I cannot find
> anything like that.
>
> Any help on this would be greatly appreciated.
>
> Thanks,
> Lars
>
>
>
>
>
>
>
Author
19 Dec 2005 9:45 PM
Lars
"carion1" <ddavis76 _at_ gmail _dot_ com> wrote in message
news:e7u7UGOBGHA.3984@TK2MSFTNGP14.phx.gbl...
> using (PreviewDialog form = new PreviewDialog(c1Report1.Document))
> {
>    this.Cursor = Cursors.WaitCursor;
>    form.ShowDialog(this);
>    this.Cursor = Cursors.Default;
> }
>
> --
>
> Derek Davis
> ddavi***@gmail.com

If you read my post again, you'll see that I intentionally commented out
"this.Cursor = Cursors.Default;"  since it does not work were it is.  That
line gets hit almost instantly (way before the page is rendered), so you
never see an hourglass.  What I am looking for is a a place to put that line
so that it gets hit AFTER the delay that takes place (while the preview
control is preparing the document to be viewed, or whatever it is doing).
In other words: before calling the preview control, I want to turn on the
hourglass and when the document is displayed in the preview I want to turn
off the hourglass.

Lars
Author
19 Dec 2005 10:56 PM
carion1
The code I posted was the "calling" code.  Could move the Cursor changes
outside of the using statement if you like.

--

Derek Davis
ddavi***@gmail.com

Show quote
"Lars" <nob***@dev.null> wrote in message
news:11qeag983p5d962@corp.supernews.com...
>
> "carion1" <ddavis76 _at_ gmail _dot_ com> wrote in message
> news:e7u7UGOBGHA.3984@TK2MSFTNGP14.phx.gbl...
>> using (PreviewDialog form = new PreviewDialog(c1Report1.Document))
>> {
>>    this.Cursor = Cursors.WaitCursor;
>>    form.ShowDialog(this);
>>    this.Cursor = Cursors.Default;
>> }
>>
>> --
>>
>> Derek Davis
>> ddavi***@gmail.com
>
> If you read my post again, you'll see that I intentionally commented out
> "this.Cursor = Cursors.Default;"  since it does not work were it is.  That
> line gets hit almost instantly (way before the page is rendered), so you
> never see an hourglass.  What I am looking for is a a place to put that
> line so that it gets hit AFTER the delay that takes place (while the
> preview control is preparing the document to be viewed, or whatever it is
> doing). In other words: before calling the preview control, I want to turn
> on the hourglass and when the document is displayed in the preview I want
> to turn off the hourglass.
>
> Lars
>
Author
19 Dec 2005 11:53 PM
Lars
"carion1" <ddavis76 _at_ gmail _dot_ com> wrote in message
news:urcPq9OBGHA.3536@TK2MSFTNGP11.phx.gbl...
> The code I posted was the "calling" code.  Could move the Cursor changes
> outside of the using statement if you like.

I understand.  The problem with that approach is that ShowDialog() does not
return until the preview window is closed.  So even after the document is
rendered and displayed, the cursor remains an hourglass.

Lars

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