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dotnet drawing api : onPaint handler
In VB 6 I would subclass the control (never done it with a textbox, but I think it would have worked), but I don't think I can do that here in .Net. Matt
The TextBox loosely wraps the Win32 TextBox and so is pretty well set in
it's ways. I have seen numerous textbox re-implementations in C# or VB that were designed to overcome those shortcomings that TextBox has. Perhaps you need a custom control... -- Bob Powell [MVP] Visual C#, System.Drawing Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm All new articles provide code in C# and VB.NET. Subscribe to the RSS feeds provided and never miss a new article. [quoted text, click to view] "YYZ" <none@none.com> wrote in message news:e8Jc0SUYFHA.2664@TK2MSFTNGP15.phx.gbl... > Is there anyway to get an onPaint handler for a textbox? > > In VB 6 I would subclass the control (never done it with a textbox, but I > think it would have worked), but I don't think I can do that here in .Net. > > Matt >
Do you have to edit the text in the box or is it just a fat label?
-- Bob Powell [MVP] Visual C#, System.Drawing Find great Windows Forms articles in Windows Forms Tips and Tricks http://www.bobpowell.net/tipstricks.htm Answer those GDI+ questions with the GDI+ FAQ http://www.bobpowell.net/faqmain.htm All new articles provide code in C# and VB.NET. Subscribe to the RSS feeds provided and never miss a new article. [quoted text, click to view] "YYZ" <none@none.com> wrote in message news:eX$q8nuYFHA.2160@TK2MSFTNGP10.phx.gbl... > > "Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> wrote in message > news:%23HWVtajYFHA.584@TK2MSFTNGP15.phx.gbl... >> The TextBox loosely wraps the Win32 TextBox and so is pretty well set in >> it's ways. I have seen numerous textbox re-implementations in C# or VB >> that were designed to overcome those shortcomings that TextBox has. > > Not to be lazy, but can you give me some keywords to search on? I'm at a > loss, honestly. > >> Perhaps you need a custom control... > > Yes I do. All I really want to do is to put an image inside the textbox > that is on the background. It's a little icon, 16x16, that is supposed to > float and stay at the right/top of a textbox, if it is multilined or not, > and the text in the control can appear over the top of it. > > Any ideas on how to create a custom control to do what I want? > > Thanks for any advice you have. > > Matt >
[quoted text, click to view] "Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> wrote in message news:%23HWVtajYFHA.584@TK2MSFTNGP15.phx.gbl... > The TextBox loosely wraps the Win32 TextBox and so is pretty well set in > it's ways. I have seen numerous textbox re-implementations in C# or VB > that were designed to overcome those shortcomings that TextBox has. Not to be lazy, but can you give me some keywords to search on? I'm at a loss, honestly. [quoted text, click to view] > Perhaps you need a custom control... Yes I do. All I really want to do is to put an image inside the textbox that is on the background. It's a little icon, 16x16, that is supposed to float and stay at the right/top of a textbox, if it is multilined or not, and the text in the control can appear over the top of it. Any ideas on how to create a custom control to do what I want? Thanks for any advice you have. Matt
[quoted text, click to view]
"Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> wrote in message news:ur%23lMwwYFHA.3616@TK2MSFTNGP15.phx.gbl... > Do you have to edit the text in the box or is it just a fat label? I wish. Yes, the text will have to be editable. Our company is just starting our first development in .Net -- we have previously used a textbox and a command button with a magnifying glass image on it to indicate to our users that they can type in a labor element code or some other type of code, or they can click on the "zoom" button to see a list -- the list may have up to 10,000 items in it, so the list needs to be a screen with filtering options, etc. In our new development, we want to get rid of a lot of the screen clutter. One option we are investigating is creating a textbox with an image on the right edge of it, but still inside the edit portion of the control. Ideally, the text would appear OVER the image if the text was that long. I've written a usercontrol that just wraps the textbox control and has a picturebox, but the text doesn't appear over the top, of course. Matt
[quoted text, click to view] "YYZ" <none@none.com> wrote in message news:Odd90b%23YFHA.1868@TK2MSFTNGP14.phx.gbl... > "Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> wrote in message > news:ur%23lMwwYFHA.3616@TK2MSFTNGP15.phx.gbl... >> Do you have to edit the text in the box or is it just a fat label? > > I wish. Yes, the text will have to be editable. In trying to get this done, I have TRIED the following, but can't figure out why it won't work. I created a new standard windows form project (VB.net) -- I then added in a project for an inherited usercontrol. I then immediately went into this usercontrol's code editor and changed its inherit line to this: Inherits System.Windows.Forms.TextBox This is very nice, as when I add the usercontol onto my test form in the other project, it acts just like a usercontrol. Now, I want to override the onPaint or onPaintBackground funtionality (is this an event, a method, ??) -- I have added this code: Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs) Debug.WriteLine("OnPaint") MyBase.OnPaint(e) End Sub But I never get a debug statement printed. I also added this (just for testing) Protected Overrides Sub OnMouseEnter(ByVal e As System.EventArgs) Debug.WriteLine("OnMouseEnter") MyBase.OnMouseEnter(e) End Sub And I DO get debug statements. So, either I'm not understanding how the onPaint thing works, or I'm just flat out trying to implement it incorrectly, or both. Any ideas from anyone out there? Once I DO figure out how to get the paint stuff plugged in, then I'll worry about drawing my image in teh correct place. After that I'll worry about adding in a new event, etc. But first, I've got to figure out how to draw what I want. Thanks to anyone out there for any advice, pointers, articles, etc. Matt
[quoted text, click to view]
YYZ wrote: > Protected Overrides Sub OnPaint(ByVal e As > System.Windows.Forms.PaintEventArgs) > Debug.WriteLine("OnPaint") > MyBase.OnPaint(e) > End Sub > > But I never get a debug statement printed. I also added this (just for > testing) instead of looking for debug meseges, just try to draw something on your control inside OnPaint(...) it seems that this Debug.WriteLine("...") does not work always as you'd expect. i had some problems with this too. oh, and maybe it would be better to create custom control (not inherited control) and just add to it one text box and expose it's methods that you need. then all you need is to add PictureBox with your image on top of this text box.
[quoted text, click to view] "SharpCoderMP" <csharp_mp@interia.pl.NFSPM> wrote in message news:uJzPR73ZFHA.2664@TK2MSFTNGP15.phx.gbl... > YYZ wrote: >> Protected Overrides Sub OnPaint(ByVal e As >> System.Windows.Forms.PaintEventArgs) >> Debug.WriteLine("OnPaint") >> MyBase.OnPaint(e) >> End Sub >> >> But I never get a debug statement printed. I also added this (just for >> testing) > > instead of looking for debug meseges, just try to draw something on your > control inside OnPaint(...) I did try that first, and wasn't seeing anything, so I added in the debug statements to see if my code was being executed, and if so, when. I took it all out when I posted here to keep it short. [quoted text, click to view] > it seems that this Debug.WriteLine("...") does not work always as you'd > expect. i had some problems with this too. I havne't used .Net much, so I bet you are right. I'll have to read up on this. [quoted text, click to view] > oh, and maybe it would be better to create custom control (not inherited > control) and just add to it one text box and expose it's methods that you > need. then all you need is to add PictureBox with your image on top of > this text box. I did do that, actually. I, just for testing exposed the whole textbox itself instead of figuring out how to pass through ALL properties and methods. And I put the picturebox on there, too, but it appears on TOP of the textbox, not behind it...meaning, I can't make the background of the textbox be transparent unfortunately. That's why I'm trying to do it this way now, by inheriting the textbox itself. Thanks for the advice, though! Matt
i did some tests...
well, i don't know why, but it looks like textBox NEVER fires OnPaint(...) event! i have no idea why. i did this: created customcontrol inherited from System.Windows.Forms.TextBox inside protected override void OnPaint(...) did some painting when i run app with this custom controll i get nice ORYGINAL textbox but when i run a debugger... well it never enteres OnPaint(...) method of my custom controll! i do not have idea what is going on here. any ideas from gurus? or maybe textBox is not painted?? maybe it just... appears on the screen in some magical way? [quoted text, click to view] YYZ wrote:
> "SharpCoderMP" <csharp_mp@interia.pl.NFSPM> wrote in message > news:uJzPR73ZFHA.2664@TK2MSFTNGP15.phx.gbl... > >>YYZ wrote: >> >>> Protected Overrides Sub OnPaint(ByVal e As >>>System.Windows.Forms.PaintEventArgs) >>> Debug.WriteLine("OnPaint") >>> MyBase.OnPaint(e) >>> End Sub >>> >>>But I never get a debug statement printed. I also added this (just for >>>testing) >> >>instead of looking for debug meseges, just try to draw something on your >>control inside OnPaint(...) > > > I did try that first, and wasn't seeing anything, so I added in the debug > statements to see if my code was being executed, and if so, when. I took it > all out when I posted here to keep it short. > > >>it seems that this Debug.WriteLine("...") does not work always as you'd >>expect. i had some problems with this too. > > > I havne't used .Net much, so I bet you are right. I'll have to read up on > this. > > >>oh, and maybe it would be better to create custom control (not inherited >>control) and just add to it one text box and expose it's methods that you >>need. then all you need is to add PictureBox with your image on top of >>this text box. > > > I did do that, actually. I, just for testing exposed the whole textbox > itself instead of figuring out how to pass through ALL properties and > methods. And I put the picturebox on there, too, but it appears on TOP of > the textbox, not behind it...meaning, I can't make the background of the > textbox be transparent unfortunately. That's why I'm trying to do it this > way now, by inheriting the textbox itself. > > Thanks for the advice, though! > > Matt >
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