C, Win32 API: l need help on Owner draw tab control

Jan 29, 2016 at 11:30pm
Firstly, thanks to you all who had in the time past guided me in my win32 programming.
right now, l need a help on owner drawn tab control.

l did the following code after creating the tab control with CreateWindowEx
Code. However, it worked fine when l didn't use the owner draw style but l don't like the default. l want to customize it.

NOTE: subject1 through subject6 are the indices of dropdown list combobox.

What l want to do is to first check if a user has made a selection. if yes, get the index, add a tab and set the tab title to the subject selected. but if no, do nothing - don't create tab.


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case WM_DRAWITEM:
		
		lpdis=(LPDRAWITEMSTRUCT) lParam;
		
		TCITEM	tie={0};
		
		if(SubjectTabs==lpdis->hwndItem){//get handle of the tab control
			if(SubjectTabs==NULL){
				MessageBox(hWnd,L"Tab can not be created.",szTitle,0);
				MessageBox(hWnd,L"Application closes",szTitle,0);
				SendMessage(hWnd,WM_CLOSE,0,0);
				break;
			}
			if(subject1){//if English is not selected, do the inner loop
				MessageBox(hWnd,L"Problem with English Subject.",szTitle,0);
				MessageBox(hWnd,L"Application closes",szTitle,0);
				SendMessage(hWnd,WM_CLOSE,0,0);
				break;
			}
			else{//
				tie.mask = TCIF_TEXT;
				tie.cchTextMax = 100;
				tie.pszText=subject1tab;//sets tab name
				SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)0,(LPARAM)&tie);//send message to add tab
				FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
				SetBkColor(lpdis->hDC,RGB(255,255,255));
			}

			if(subject2<=0){//if subject 2 is not selected, do nothing
				//do nothing and tab will not be added	
			}
			else{
				tie.mask = TCIF_TEXT;
				tie.cchTextMax = 100;
				tie.pszText=subject2tab;//sets tab name
				SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)1,(LPARAM)&tie);//send message to add tab
				FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
				SetBkColor(lpdis->hDC,RGB(255,255,255));
			}

			if(subject3<=0){//if subject 3 is not selected, do nothing
				//do nothing and tab will not be added
			}
			else{
				tie.mask = TCIF_TEXT;
				tie.cchTextMax = 100;
				tie.pszText=subject3tab;////
				SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)2,(LPARAM)&tie);//send message to add tab
				FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
				SetBkColor(lpdis->hDC,RGB(255,255,255));
			}

			if(subject4<=0){//if subject 4 is not selected, do nothing
				//do nothing and tab will not be added
			}
			else{
				tie.mask = TCIF_TEXT;
				tie.cchTextMax = 100;
				tie.pszText=subject4tab;////
				SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)3,(LPARAM)&tie);//send message to add tab
				FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
				SetBkColor(lpdis->hDC,RGB(255,255,255));
			}

			if(subject5<=0){//if subject 5 is not selected, do nothing
				//do nothing and tab will not be added
			}
			else{
				tie.mask = TCIF_TEXT;
				tie.cchTextMax = 100;
				tie.pszText=subject5tab;
				SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)4,(LPARAM)&tie);//send message to add tab
				FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
				SetBkColor(lpdis->hDC,RGB(255,255,255));
			}

			if(subject6<=0){//if subject 6 is not selected, do nothing
				//do nothing and tab will not be added
			}
			else{
				tie.mask = TCIF_TEXT;
				tie.cchTextMax = 100;

				tie.pszText=subject6tab;////
				SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)5,(LPARAM)&tie);//send message to add tab
				FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
				SetBkColor(lpdis->hDC,RGB(255,255,255));
			}
		}
		break;


but l got the following error;
1>c:\users\chibu\documents\visual studio 2010\projects\unical ptume\unical ptume\unical ptume.cpp(349): error C2360: initialization of 'tie' is skipped by 'case' label
1> c:\users\chibu\documents\visual studio 2010\projects\unical ptume\unical ptume\unical ptume.cpp(261) : see declaration of 'tie'
1>c:\users\chibu\documents\visual studio 2010\projects\unical ptume\unical ptume\unical ptume.cpp(355): error C2361: initialization of 'tie' is skipped by 'default' label
1> c:\users\chibu\documents\visual studio 2010\projects\unical ptume\unical ptume\unical ptume.cpp(261) : see declaration of 'tie'

So can someone help me on out/
Thanks in advance.
Last edited on Jan 29, 2016 at 11:31pm
Jan 29, 2016 at 11:48pm
you can either move the declaration of tie so it is completely outside the switch statement, or add braces (which is what i do.

[code]
case WM_DRAWITEM:
{
//blah
}

see https://msdn.microsoft.com/en-us/library/61af7cx3.aspx
Jan 30, 2016 at 12:06am
@Jaybobb6: It work - compiled. Thanks. Humm, but the tab control was not created. May be l didn't code it well. but any more light on it will be appreciated as there are no much tut on the subject on the net for me to refer to. l didn't much understand that of microsoft. https://support.microsoft.com/en-us/kb/179909
Jan 30, 2016 at 3:21am
sorry, I haven't done any owner draw stuff for many years.
Hopefully someone else can contribute there.
Jan 30, 2016 at 9:42am
How did you create the TabControl ?
Jan 30, 2016 at 9:52pm
@Thomas1965:
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SubjectTabs=CreateWindow(WC_TABCONTROL,L"",WS_CHILD|WS_VISIBLE|TCS_OWNERDRAWFIXED,0,0,0,0,hwnd,(HMENU)IDC_TAB1,hInst,NULL);		
	


where SubjectTabs is a HWND type.
However, it now works cos l followed the tut on https://support.microsoft.com/en-us/kb/179909 but it doesn't look fine. The whole tab is the color l set and nothing to differentiate between tabs. l want it to be in a way, the tab(the title area where the user clicks to toggle between tabs) will have a blue colour while the display area will be white and again, the titles l set doesn't show but shows when l don't use the custom style. Please l need more help tut on it.
Thanks in advance.

PS: never mine the x,y,cy,cy coordinate, cos l used movewindow in wm_size to size them.
Last edited on Jan 30, 2016 at 9:55pm
Jan 31, 2016 at 9:31am
Could you post the complete code or upload the project somewhere?
Jan 31, 2016 at 9:43pm
@Thomas1965:
For owner draw that does not work:

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case WM_CREATE:

INITCOMMONCONTROLSEX icce = {0};
	TCITEM tie={0};
	icce.dwICC=ICC_TAB_CLASSES;
	icce.dwSize=sizeof(INITCOMMONCONTROLSEX);
	InitCommonControlsEx(&icce);
HWND SubjectTabs=CreateWindow(WC_TABCONTROL,L"",WS_CHILD|WS_VISIBLE|TCS_OWNERDRAWFIXED,300,50,700,1000,hwnd,(HMENU)IDC_TAB1,hInst,NULL);	
....

case WM_DRAWITEM:
		
		lpdis=(LPDRAWITEMSTRUCT)lParam;
		switch(lpdis->itemID){
		case 0:
			tie.mask = TCIF_TEXT;
			tie.cchTextMax = 100;
			tie.iImage=-1;
			tie.pszText=L"Tab 1";//sets tab name
			SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)0,(LPARAM)&tie);
			FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
			SetBkColor(lpdis->hDC,RGB(100,200,155));
			break;
		case 1:
		tie.mask = TCIF_TEXT;
			tie.cchTextMax = 100;
			tie.iImage=-1;
			tie.pszText=L"Tab 2";//sets tab name
			SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)0,(LPARAM)&tie);
			FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
			SetBkColor(lpdis->hDC,RGB(100,200,155));
			break;
		}
		break;


but if l use style TCS_FIXEDWIDTH do the following, it works fine;

Default draw:

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case WM_CREATE:
HWND SubjectTabs=CreateWindow(WC_TABCONTROL,L"",WS_CHILD|WS_VISIBLE|TCS_FIXEDWIDTH,300,50,700,1000,hwnd,(HMENU)IDC_TAB1,hInst,NULL);	
tie.mask = TCIF_TEXT;
		tie.cchTextMax = 100;
		tie.iImage=-1;
		tie.pszText=L"Tab 1;//sets tab name
		SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)0,(LPARAM)&tie); 
Feb 1, 2016 at 9:09am
I have do a little experiment with TCS_OWNERDRAWFIXED.

Main.h
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#ifndef MAIN_H
#define MAIN_H

#include <Windows.h>
#include <tchar.h>

#define WIN_WIDTH   800
#define WIN_HEIGHT  600

TCHAR *ClsName = _T("BasicApp");
TCHAR *WndName = _T("Template");

ATOM WINAPI RegisterMyClass(HINSTANCE hInstance);
LRESULT CALLBACK WndProcedure(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int);

HWND CreateTabControl(HWND hMainWindow);
void PaintTab(LPDRAWITEMSTRUCT lpdis);

#endif


Main.cpp
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#include <windows.h>
#include <commctrl.h>
#include "main.h"

HWND        g_hTabControl;
HINSTANCE   g_hInstance;

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
  MSG        Msg;
	HWND       hWnd;
	
	g_hInstance = hInstance;

  if (!RegisterMyClass(hInstance))
    return FALSE;

  int left = (GetSystemMetrics(SM_CXSCREEN) - WIN_WIDTH) / 2;
  int top = (GetSystemMetrics(SM_CYSCREEN) - WIN_HEIGHT) / 2;

	hWnd = CreateWindow(ClsName, WndName, WS_BORDER | WS_SYSMENU	,
                      left, top, WIN_WIDTH, WIN_HEIGHT,
                      NULL, NULL, hInstance, NULL);

	if (!hWnd)
		return FALSE;
		
	INITCOMMONCONTROLSEX cc = {0};
	
	cc.dwSize = sizeof(INITCOMMONCONTROLSEX);
	cc.dwICC = ICC_TAB_CLASSES;
	InitCommonControlsEx(&cc);

	ShowWindow(hWnd, SW_SHOWNORMAL);
	UpdateWindow(hWnd);

	while (GetMessage(&Msg, NULL, 0, 0))
	{
    TranslateMessage(&Msg);
    DispatchMessage(&Msg);
	}

	return Msg.wParam;
}

ATOM WINAPI RegisterMyClass(HINSTANCE hInstance)
{
  WNDCLASSEX WndClsEx;

	WndClsEx.cbSize        = sizeof(WNDCLASSEX);
	WndClsEx.style         = CS_HREDRAW | CS_VREDRAW;
	WndClsEx.lpfnWndProc   = WndProcedure;
	WndClsEx.cbClsExtra    = 0;
	WndClsEx.cbWndExtra    = 0;
	WndClsEx.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
	WndClsEx.hCursor       = LoadCursor(NULL, IDC_ARROW);
	WndClsEx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	WndClsEx.lpszMenuName  = NULL;
	WndClsEx.lpszClassName = ClsName;
	WndClsEx.hInstance     = hInstance;
	WndClsEx.hIconSm       = LoadIcon(NULL, IDI_APPLICATION);

	return RegisterClassEx(&WndClsEx);
}

LRESULT CALLBACK WndProcedure(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
  switch (Msg)
  {
    case WM_CREATE:
      g_hTabControl = CreateTabControl(hWnd);
      break;
    case WM_DRAWITEM:
      PaintTab((LPDRAWITEMSTRUCT)lParam);
			break;

		case WM_DESTROY:
      PostQuitMessage(0);
      break;
    default:
      return DefWindowProc(hWnd, Msg, wParam, lParam);
  }
  return 0;
}

void PaintTab(LPDRAWITEMSTRUCT lpdis)
{
  COLORREF TextColor;
  
  switch (lpdis->itemID)
  {
    case 0:
      TextColor = RGB(0,0, 128);
      break;
    case 1:
      TextColor = RGB(0,128, 0);
      break;
    default:
      TextColor = RGB(128, 0, 0);
  }
  TCHAR buf[128];
  
  TCITEM tci;
  tci.mask = TCIF_TEXT;
  tci.pszText = buf;
  tci.cchTextMax = sizeof(buf) * sizeof(TCHAR);
  TabCtrl_GetItem(g_hTabControl, lpdis->itemID, &tci);
  
  FillRect(lpdis->hDC,&lpdis->rcItem,(HBRUSH)GetStockObject(WHITE_BRUSH));
  SetTextColor(lpdis->hDC, TextColor);
  SetBkMode(lpdis->hDC, TRANSPARENT);
	DrawText(lpdis->hDC, tci.pszText, _tcslen(tci.pszText), &lpdis->rcItem, DT_CENTER|DT_VCENTER|DT_SINGLELINE);
}

HWND CreateTabControl(HWND hMainWindow)
{
  DWORD dwStyle = WS_VISIBLE | WS_TABSTOP | WS_CHILD | TCS_OWNERDRAWFIXED;
  
  HWND hWnd = CreateWindow(WC_TABCONTROL, NULL, dwStyle,
                           10, 10, WIN_WIDTH - 20, WIN_HEIGHT - 20, hMainWindow,
                           NULL, g_hInstance, NULL);
                           
  TCITEM  tci;
              
  tci.mask = TCIF_TEXT;
  tci.iImage = -1;
  tci.pszText = _T("German");             
  TabCtrl_InsertItem(hWnd, 0, &tci);
  
  tci.pszText = _T("English");             
  TabCtrl_InsertItem(hWnd, 1, &tci);
  
  tci.pszText = _T("Spanish");             
  TabCtrl_InsertItem(hWnd, 2, &tci);
  
  return hWnd;
}

Hope you find it helpful
Feb 1, 2016 at 11:16pm
@thomas1965: Thanks alot - it worked. However, only the top part(the part where user clicks to toggle between tab) changed color. Is there a way to also change the color of the tab client area?
Feb 2, 2016 at 9:08am
I don't think that there is a way, you can paint only inside the lpdis->rcItem.

However I saw one example in a book that used modeless dialogs for the content.
Feb 2, 2016 at 10:38am
Ok. Can you please help me with the book name/title. Thanks
Feb 2, 2016 at 1:04pm
I can try, but what help do you need ?
Feb 2, 2016 at 1:21pm
So l can see how it is being done. Am just beginning to code in win32. or you give me a snap shot of it or PM the name.
Feb 2, 2016 at 1:45pm
I still don't know what you want to do.
You mentioned book name/title, but what are they?
Maybe you can upload the project and the complete task and send me a PM.
Feb 2, 2016 at 1:47pm
Ok. Thanks for your help and concern. l will do so.
Mar 16, 2016 at 11:52pm
I have done something like that maybe it can be usefull !

#pragma comment(linker,"/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
#include <Windows.h>
#include <CommCtrl.h>

LRESULT CALLBACK wndproc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK wndproc2(HWND, UINT, WPARAM, LPARAM);
BOOL CALLBACK Aboutdlgproc(HWND, UINT, WPARAM, LPARAM);
HWND WINAPI Createtabcontrol(HWND hwndparent, HINSTANCE hinstance, LPTSTR sztext);
VOID painttab(LPDRAWITEMSTRUCT lpdis, HWND hwndtab);
HWND tabchildwindow(HWND hwndtab, HINSTANCE hinstance);
struct
{
TCHAR *szday;
}
dayoftheweek[] = { TEXT("Lundi"), TEXT("Mardi"), TEXT("Mercredi"), TEXT("Jeudi"), TEXT("Vendredi"), TEXT("Samedi"), TEXT("Dimanche") };

int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE previnstance, PSTR szcmdline, int cmdshow)
{
static TCHAR szappname[] = TEXT("About box demo program 3");
HWND hwnd;
MSG msg;
WNDCLASS wc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hIcon = LoadIcon(NULL,IDI_APPLICATION );
wc.hInstance = hinstance;
wc.lpfnWndProc = wndproc;
wc.lpszClassName = TEXT("classe 1");
wc.lpszMenuName = NULL;
wc.style = 0;

if (!RegisterClass(&wc))
{
MessageBox(NULL, TEXT("This software required windows NT "), TEXT("ERROR"), MB_ICONERROR);
return 0;
}
wc.lpszClassName = TEXT("classe 2");
wc.lpfnWndProc = wndproc2;
RegisterClass(&wc);
hwnd = CreateWindowEx(0, TEXT("classe 1"), szappname, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hinstance, NULL);

ShowWindow(hwnd, SW_SHOW);
UpdateWindow(hwnd);

while (GetMessage(&msg, 0, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}

LRESULT CALLBACK wndproc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
//DWORD dwstyle ;
static HINSTANCE hinstance;
static HWND hwndtab, hwndchild;
static TCHAR *sztext;
switch (msg)
{
case WM_CREATE:
hinstance = ((LPCREATESTRUCT)lparam)->hInstance;
hwndtab = Createtabcontrol(hwnd, hinstance, sztext);
hwndchild = tabchildwindow(hwnd, hinstance);

return 0;
case WM_SIZE:

HDWP hdwp;
RECT rc;
SetRect(&rc, 0, 0, LOWORD(lparam), HIWORD(lparam));
TabCtrl_AdjustRect(hwndtab, FALSE, &rc);
hdwp = BeginDeferWindowPos(2);
DeferWindowPos(hdwp, hwndtab, NULL, 0, 0, LOWORD(lparam), HIWORD(lparam), SWP_NOCOPYBITS | SWP_NOZORDER);
DeferWindowPos(hdwp, hwndchild, HWND_BOTTOM, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, SWP_NOCOPYBITS );
EndDeferWindowPos(hdwp);
break;
case WM_NOTIFY:
HBRUSH hbrush;
switch (((LPNMHDR)lparam)->code)
{
case TCN_SELCHANGE:
{
int ipage;
ipage = TabCtrl_GetCurSel(hwndtab);
sztext = dayoftheweek[ipage].szday;
hbrush = CreateSolidBrush(RGB(rand() % 255, rand() % 255, rand() % 255));
SetClassLong(hwndchild, GCL_HBRBACKGROUND, (LONG)hbrush);
InvalidateRect(hwndchild, NULL, TRUE);

break;
}
}
return 0;

case WM_DRAWITEM:
painttab((LPDRAWITEMSTRUCT)lparam, hwndtab);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;

}
return DefWindowProc(hwnd, msg, wparam, lparam);
}

HWND WINAPI Createtabcontrol(HWND hwndparent, HINSTANCE hinstance, LPTSTR sztext)
{
INITCOMMONCONTROLSEX icex;
RECT rcclient;
HWND hwndtab;

TCITEM tie;
int i;
GetClientRect(hwndparent, &rcclient);

icex.dwSize = sizeof(INITCOMMONCONTROLSEX);
icex.dwICC = ICC_TAB_CLASSES;
InitCommonControlsEx(&icex);
hwndtab = CreateWindowEx(0, WC_TABCONTROL, NULL, WS_CHILD | WS_CLIPSIBLINGS| WS_VISIBLE,
0, 0, rcclient.right, rcclient.bottom,hwndparent, NULL, hinstance, NULL);
tie.mask = TCIF_TEXT | TCIF_IMAGE;

tie.iImage = -1;


for (i = 0; i < 7; i++)
{
sztext = dayoftheweek[i].szday;
tie.pszText = sztext;
if (TabCtrl_InsertItem(hwndtab, i, &tie) == -1)
{
DestroyWindow(hwndtab);
return NULL;
}
}
return hwndtab;
}



VOID painttab(LPDRAWITEMSTRUCT lpdis, HWND hwndtab)
{
COLORREF textcolor;
switch (lpdis->itemID)
{
case 0:
textcolor = RGB(255, 255, 255);
break;
default:
textcolor = RGB(255, 255, 255);
break;
}
TCHAR szbuffer[128];
TCITEM tci;
tci.mask = TCIF_TEXT;
tci.pszText = szbuffer;
tci.cchTextMax = sizeof(szbuffer) / sizeof(TCHAR);

TabCtrl_GetItem(hwndtab, lpdis->itemID, &tci);
FillRect(lpdis->hDC, &lpdis->rcItem, (HBRUSH)CreateSolidBrush(RGB(29, 107, 214)));
SetTextColor(lpdis->hDC, textcolor);
SetBkMode(lpdis->hDC, TRANSPARENT);
DrawText(lpdis->hDC, tci.pszText, lstrlen(tci.pszText), &lpdis->rcItem, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
}

HWND tabchildwindow(HWND hwndtab, HINSTANCE hinstance)
{
HWND childwindow;
childwindow = CreateWindowEx(0, TEXT("classe 2"), NULL, WS_OVERLAPPED | WS_CHILDWINDOW | WS_VISIBLE, 0, 0, 0, 0, hwndtab, NULL, hinstance, NULL);
return childwindow;
}

LRESULT CALLBACK wndproc2(HWND hwnd , UINT msg, WPARAM wparam, LPARAM lparam)
{

return DefWindowProc(hwnd, msg, wparam, lparam);
}
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