Hi guys,
I have a question to VB .NET: I add a Graphics object to a panel and use
a bunch of DrawLine methods etc (it's really nice and convenient).
But: As soon as I send my form (which contains the panel) to the task
bar and get it back, the graphics are gone.
I guess that I need to add an event handler to the pane (or the form?),
but which event do I have to handle? And which method do I call on the
panel to get it repainted? Panel.Invalidate?
I have the same problem if I resize the form containing the panel - If I
make it smaller such that some of the graphics disappear, they are gone
if I make it bigger again.
One more question: I would like my panel to resize itself if the form
whicht contains it gets resized (e.g. maximized). How can I do this? I'm
actually not sure if this is related to the problem above (maybe the
panel grows, but my graphics just don't get repainted :-)
Sorry if those questions are stupid, but I'm new to VB .NET and to UI
programming...
Thankx in advance,
Christian
2  3553 
Hi,
If you want the panel to redraw the graphics draw your lines in the
paint event. To get your control to resize itself look at the panels anchor
property.
Ken
-----------------
"Christian Soltenborn" <no*****************@web.de> wrote in message
news:c5************@ID-36219.news.uni-berlin.de... Hi guys,
I have a question to VB .NET: I add a Graphics object to a panel and use
a bunch of DrawLine methods etc (it's really nice and convenient).
But: As soon as I send my form (which contains the panel) to the task
bar and get it back, the graphics are gone.
I guess that I need to add an event handler to the pane (or the form?),
but which event do I have to handle? And which method do I call on the
panel to get it repainted? Panel.Invalidate?
I have the same problem if I resize the form containing the panel - If I
make it smaller such that some of the graphics disappear, they are gone
if I make it bigger again.
One more question: I would like my panel to resize itself if the form
whicht contains it gets resized (e.g. maximized). How can I do this? I'm
actually not sure if this is related to the problem above (maybe the
panel grows, but my graphics just don't get repainted :-)
Sorry if those questions are stupid, but I'm new to VB .NET and to UI
programming...
Thankx in advance,
Christian
Draw graphics in a bitmap and display that bitmap
Christian Soltenborn wrote: Hi guys,
I have a question to VB .NET: I add a Graphics object to a panel and use
a bunch of DrawLine methods etc (it's really nice and convenient).
But: As soon as I send my form (which contains the panel) to the task
bar and get it back, the graphics are gone.
I guess that I need to add an event handler to the pane (or the form?),
but which event do I have to handle? And which method do I call on the
panel to get it repainted? Panel.Invalidate?
I have the same problem if I resize the form containing the panel - If I
make it smaller such that some of the graphics disappear, they are gone
if I make it bigger again.
One more question: I would like my panel to resize itself if the form
whicht contains it gets resized (e.g. maximized). How can I do this? I'm
actually not sure if this is related to the problem above (maybe the
panel grows, but my graphics just don't get repainted :-)
Sorry if those questions are stupid, but I'm new to VB .NET and to UI
programming...
Thankx in advance,
Christian This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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