|
Hi!
I want to try and override OnPaint() of my tree ctrl. I have never done tried redrawing myself before and is new to me. Could anyone please tell me all the things that has to be taken care of while doing this? If there is site somewhere for beginners with this, do let me know.
NC
|
|
|
|
|
Are you *really* going to draw tree control yourself? The lines, +/- buttons, icons, text?
If not, you may consider custom-draw, which allows you to draw only selected parts.
Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **
|
|
|
|
|
Hi!
Thanks for writing back.
This is what I want to do. I am not sure what to use - custom draw or owner draw. Maybe you can tell me what is best.
I don't have the +/- signs in my tree. I have an image list associated with the tree. Some items have icons and some don't. For those items with icons, I want to display the icon and the text a few pixels right to where the tree ctrl draws it, basically indent further.
Any ideas on how to do this?
NC
|
|
|
|
|
So all you need is extra indentation for tree items? Or you just want to display something in this extra space?
Anyway, go with custom-draw. There's no owner-draw for tree controls; you'd have to paint everything yourselft; in such case why would you need the tree control? Just for item storage?
Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **
|
|
|
|
|
Hi!
Thanks again!
Yes, all I need is extra indentation for some items.
I tried custom draw, and got the item text to be indented. But the icon is shown at the same place as it was before. And I am not sure how to redraw the icon. This is where I am struck at, right now.
How can I redraw the icon?
Thanks,
NC
|
|
|
|
|
NC wrote:
Yes, all I need is extra indentation for some items.
The extra indentation is always identical? Or varies between items?
Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **
|
|
|
|
|
Hi!
It has to be x + the current indentation. So, basically for items with icons, I need to get the current indentation of the item with respect to its parent(which is fine) and add a constant to it and indent by that much. This constant is same for all items.
Thanks,
NC
|
|
|
|
|
Before continuing with custom-draw (CTreeCtrl::GetImageList and CImageList::Draw will greatly help there) consider using item state images. Each item can have two icons; if you'll have empty state icon you can use it as simulated indent.
Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **
|
|
|
|
|
Hi!
Is it possible to have more than 2 icons? I have a state image as well.
Thanks,
NC
|
|
|
|
|
No, AFAIK only two.
Indent must be on the left side of icons, right? You can't simply add extra spaces into item text. In such case you'll have to custom-draw.
Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **
|
|
|
|
|
Hi!
So, I guess it is Custom draw for me then! Do you know of any sites which show how do this? I looked on this forum and couldn't find any. I have never done this, so I don't even know how to start to draw the icon.
Thanks for all your help,
NC
|
|
|
|
|
|
Thanks, I'll try that.
NC
|
|
|
|
|
hi there
i need some help on figuring out how to make one of my Bitmap resources the background of my dialog window. I am really stuck! Can somebody please help me on figuring out how to do this.
I really dont wanna use someone elses class that they created i just want to know how to do it. Please if you have any instructions on how to do this i would greatly appreciate it.
Thanks again!
|
|
|
|
|
|
hi there
i need some help on figuring out how to make one of Bitmap resources the background of my dialog window. I am really stuck! Can somebody please help me on figuring out how to do this.
Thanks again!
|
|
|
|
|
As a starting point, you can check the demo application of the CButtonST class. One of its pages has a bitmapped background.
Bye!
SoftechSoftware
Davide Calabro'
davide_calabro@yahoo.com
http://www.softechsoftware.it
|
|
|
|
|
This is a problem I've had before, but I just can't seem to figure it
out:
I have a dialog (CDlgIEAddText) that modifys properties of a class
(CIELayerText), and I have created a member variable in (CIELayerText)
of type (CDlgIEAddText*) .
I have included the DlgIEAddText.h header file, but the compiler keeps
saying "ielayertext.h(26) : error C2501: 'CDlgIEAddText' : missing
storage-class or type specifiers"
Does anyone know why I can't declare this pointer even though I have
included the header file??
Thanks!
Here's the CIELayerText.h file and error the compiler generates:
*** HEADER FILE ***
// IELayerText.h: interface for the CIELayerText class.
//
//////////////////////////////////////////////////////////////////////
#if
!defined(AFX_IELAYERTEXT_H__29E5E993_F1E6_4F27_BEA6_DC5C4380E20D__INCL
UDED_)
#define
AFX_IELAYERTEXT_H__29E5E993_F1E6_4F27_BEA6_DC5C4380E20D__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include "DlgIEAddText.h"
#include "IELayerObject.h"
class CIELayerText : public CIELayerObject
{
public:
void Properties(CWnd* pWnd);
void ContextMenu(CPoint point, CWnd* pWnd);
void Render(CDC* pDC);
BOOL Create(CString csText, CRect* pRect, LOGFONT* logfontFont,
COLORREF colorFG, COLORREF colorBG, DWORD dwAlign);
CIELayerText();
virtual ~CIELayerText();
private:
CDlgIEAddText *m_pDlg; // *** I can't declare this pointer, why not?
DWORD m_dwAlign;
CString m_csText;
LOGFONT m_logfontFont;
};
#endif //
!defined(AFX_IELAYERTEXT_H__29E5E993_F1E6_4F27_BEA6_DC5C4380E20D__INCL
UDED_)
|
|
|
|
|
I have no idea why #including file doesnt't work - maybe preprocessor symbol used to ensure that .h file is included only once is duplicated. But... you don't have to #include anything if you just want a pointer. Use forward declaration instead:
class CDlgIEAddText;
class CIELayerText
{
CDlgIEAddText *m_pDlg;
};
Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **
|
|
|
|
|
if DlgIEAddText.h is included in a precompiled header (stdafx.h) you can get this kind of error. It happens because the .h file is not recompiled until you do a rebuild all.
Hope that helps
|
|
|
|
|
Is there a way to add some sort of a box for displaying text on the toolbar? I'm drawing a graphics program using openGL and I want to display the degrees of rotation on the toolbar as the object is rotated.
|
|
|
|
|
|
I have about 4 books on VC++.. and i've looked through all of the articles i can find here on CP.. and i still have problems understanding.. 
1) Is it possible to split the main window and put 2 different property pages (or views, dialogs, etc.) in each view when a button is pressed, and not just during OnCreateClient().. every single example i have seen splits the main window during OnCreateClient()..
2) Is it possible to create a CWnd derived class that displays full screen, and is split in two with 2 different dialogs in it (one in each half).
could someone please let me know what the best way to go about this is? im basicly trying to have a split screen with a dialog (or property sheet) on the left, and a form on the right which updates based on what is typed in the dialog on the left. Any help would be much appreciated.
-dz
|
|
|
|
|
(1) - yes, it's possible. Are you using static or dynamic splitter?
(2) - yes, it's possible. KB article Q164162 has information about going full-screen in MFC. Once you have full-screen option implemented, you can use splitter.
Tomasz Sowinski -- http://www.shooltz.com
** If you're going to rape, pillage and burn, be sure to do things in that order. **
|
|
|
|
|
1) I'm using neither as I can't figure out how to create the splitter outside of OnCreateClient(). OnCreateClient takes a pointer of CCreateContext* pContext, and I don't know how to create this type. I have tried creating my own CCreateContext and set all of its member variables to NULL, but this causes nothing but assertion errors.
I basicly have a function CSplitTestApp::OnFileTest() which gets called when you click a button on the toolbar, at that point i want either the main window to split, or a new window to popup split in half with a dialog in each view. The Create function of CSplitterWnd also takes a pointer to the parent window (CWnd*), which i dont' know how to do since it is being called from CSplitTestApp which is derived from CWinApp, not CWnd.
I have tried to create a class that has CSplitterWnd as its base class, but again I can't call the Create, or CreateStatic because I cant create the CCreateContext, and I cant get a pointer to the MainFrame from the CSplitTestApp.
Basicly I don't know how to even get started it seems, but i've been pushing this off for too long in this project and I have to be able to have a split view somehowwhen the user clicks a button from the file menu.
2) I found the article just now, im off to lunch, hopefully that will help some.
thanks for your responce, i hope im not too newbie for ya!
-dz
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
