I have the following code which passes a window handler form OpenCV window to win32 handler, therefore I can show the grabbed images from camera to the screen and the images will show as a child window of my main API.
but the problem is that when I want to add a tooldbar to my program, the image window handler comes at the top of the toolbar. how can I sort this out?
//create a window and set the handler from openCV to win32
cv::namedWindow("test",cv::WINDOW_AUTOSIZE);
hWnd2 = (HWND) cvGetWindowHandle("test");
hParent = ::GetParent(hWnd2);
::SetParent(hWnd2, hWnd);
::ShowWindow(hParent, SW_HIDE);
_liveCapturing=true;
lastPicNr = 0;
SetWindowTextW(hStatus, L"Live Capturing ... ");
if(FullScreen()){
::ShowWindow(hWnd, SW_MAXIMIZE);
}
code for the toolbar :
HWND CreateToolbar(HWND hwnd){
HWND hTbar = CreateWindowEx(0, TOOLBARCLASSNAME, NULL, WS_CHILD | WS_VISIBLE | CCS_TOP , 0, 0, 0, 0, hwnd, (HMENU)12, GetModuleHandle(NULL), NULL);
SendMessage(hTbar, TB_BUTTONSTRUCTSIZE, (WPARAM)sizeof(TBBUTTON), 0);
TBBUTTON tbb[3];
TBADDBITMAP tbab;
tbab.hInst = HINST_COMMCTRL;
tbab.nID = IDB_STD_SMALL_COLOR;
SendMessage(hTbar, TB_ADDBITMAP, 0, (LPARAM)&tbab);
return hTbar;
}
Probably you have found the solution a long time ago, but i want to post my anwers in case other users need it.
You can simply add the OpenCV window with the same code you have to a child window in your window (which you set it position in advance). For example you can add it to a static text window (label) ...
If you want to move the OpenCV window, call SetWindowPos() with the desired coordinates.
SetWindowPos(hWnd2, 0, 0, 30, 0, 0, SWP_NOSIZE | SWP_NOZORDER);
Related
I've been looking for a way to make a picture a button in c++ for a few hours now.. I've found stuff on using bitmaps, what what i am currently using to display the image is GDI+, because i want to use jpg/png files.
This is how i created my Image with gdiplus:
void Example_DrawImage(HDC hdc) {
Graphics graphics(hdc);
image = Image::FromFile(L"Path:/To/Image");
myBitmap = dynamic_cast<Bitmap*>(image);
Pen pen(Color(0, 0, 0, 0), 2);
graphics.DrawImage(image, 10, 10);
}
I converted that to a bitmap with:
myBitmap = dynamic_cast<Bitmap*>(image);
Then, in WM_CREATE I created a button which it's standard style is a Windows XP Button:
button = CreateWindow(TEXT("button"), TEXT("Hello"),
WS_VISIBLE | WS_CHILD | BS_BITMAP,
10, 10, /* x & y*/ 80, 25, /*width & height*/
hwnd, (HMENU) 1, hInstance, NULL
);
button is globally defined as HWND button;
All I want is to have a button that is a jpg picture. I tried doing it manually by seeing if a mouse click was inside a certain area, but I could not find a way to find the position of the Image.
CreateWindowEx API really posts WM_SIZE message?
When I create a window via CreateWindowEx as full screen mode,
CreateWindowEx posts WM_SIZE but window mode doesn't.
My code sets the window style like this :
if(bFullscr)
{
//When the window is in full screen mode.
nStyle = WS_POPUP;
nExtraStyle = WS_EX_APPWINDOW;
}
else
{
//Otherwise.
nStyle = WS_OVERLAPPEDWINDOW;
nExtraStyle = (WS_EX_APPWINDOW | WS_EX_WINDOWEDGE);
}
And changes display settings like this (full screen mode only) :
if(bFullscr)
{
DEVMODE sScrSet;
memset(&sScrSet, 0, sizeof(DEVMODE));
sScrSet.dmSize = sizeof(DEVMODE);
sScrSet.dmPelsWidth = nWidth;
sScrSet.dmPelsHeight = nHeight;
sScrSet.dmBitsPerPel = nColorBit;
sScrSet.dmFields = (DM_BITSPERPEL | DM_PELSHEIGHT | DM_PELSWIDTH);
if(ChangeDisplaySettings(&sScrSet, CDS_FULLSCREEN) != DISP_CHANGE_SUCCESSFUL)
{
//Error routine.
}
}
I'm really wonder why CreateWindowEx posts WM_SIZE message selectively.
If you simply want to resize the window, somewhere in your code you should have ShowWindow(hWnd, nCmdShow); change it as follows:
ShowWindow(hWnd, SW_SHOWDEFAULT);//show normal
ShowWindow(hWnd, SW_SHOWMAXIMIZED);//show maximized (full screen)
SetWindowPos(hWnd, NULL, 10, 10, 300, 300, SWP_SHOWWINDOW);//show at specific position
Also you could use WS_MAXIMIZE in CreateWindow, but that could complicate things. Window usually has WS_OVERLAPPEDWINDOW or WS_POPUP|WS_CAPTION|WS_SYSMENU. You should pick one and keep it simple.
When Window size changes, it receives WM_SIZE, you can catch that and examine it.
Here is how the program looks as it starts :
http://oi58.tinypic.com/2dwgs4h.jpg (can't upload images if I have less than 10 rep, sorry)
As soon as I hover with the cursor to change tab, every control which is not a child of the tabcontrol gets painted over in white as shown here :
http://oi61.tinypic.com/2yvuiwl.jpg
Here is how I created the TabControl in WM_CREATE:
RECT client_rect;
GetClientRect(hwnd, &client_rect);
TabControl = CreateWindowEx(WS_EX_COMPOSITED, WC_TABCONTROL, L"", WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN,
10, 10, client_rect.right - client_rect.left - 20,
client_rect.bottom - client_rect.top - 20, hwnd, (HMENU)110, GetModuleHandle(NULL), NULL);
TCITEM tab_info;
memset(&tab_info, 0, sizeof(tab_info));
tab_info.mask = TCIF_TEXT;
tab_info.pszText = L"Encoder";
tab_info.cchTextMax = 5;
SendMessage(TabControl, TCM_INSERTITEM, 0, (LPARAM)&tab_info);
tab_info.pszText = L"Decoder";
SendMessage(TabControl, TCM_INSERTITEM, 1, (LPARAM)&tab_info);
tab_info.pszText = L"Info Tab ";
SendMessage(TabControl, TCM_INSERTITEM, 2, (LPARAM)&tab_info);
RECT tab_rectangle;
GetClientRect(TabControl, &tab_rectangle);
SendMessage(TabControl, TCM_ADJUSTRECT, FALSE, (LPARAM)&tab_rectangle);
DefaultTabProc = (WNDPROC)SetWindowLongPtr(TabControl, GWL_WNDPROC, (LONG_PTR)TabProc);
Every other control is a child of the main window, except for the two buttons on the left which are defined as childs of the TabControl it self.
I've subclassed the TC to be able to paint that 50x50 px bitmap in bottom left and I'm handling the WM_PAINT of the subclassed wndproc this way :
case WM_PAINT:
{
if (!BitmapCall) //bool to decide whether I invalidated this rect to print the bitmap or not
CallWindowProc(DefaultTabProc, hwnd, uMsg, wParam, lParam);
if (EncodingTab) //we are in the Encoding tab, so print the bitmap
{
HDC hdc = GetDC(hwnd);
Graphics grap(hdc);
grap.DrawImage(&(*bitmap), 20, 248);
ReleaseDC(hwnd, hdc);
BitmapCall = false;
}
break;
}
Strangely, if I call Graphics grap(GetDC(hwnd)); the problem does not arise, and I'd take this route if it wasn't for the great memory leak i'm facing over few dozens of seconds after the application starts.
I tried to handle Tabcontrol's WM_ERASEBKGND and just return TRUE without luck. I could then make every control child of the TC but apparently groupboxes and radio buttons doesn't like the idea and gets painted all in black leaving me with even more troubles.
Painting the bitmap from the main frame window looks impossible since it gets overpainted by again said TC,
I may finally try to handle the order in which everything gets painted but I have no clue on where to start/how to do
Thanks in advance
I'm a newbie in windows programming and am continuously running into different kinds of problems, most of which I have been able to solve by myself.
My problem at hand is the caret (or cursor) shown in text areas. The thing that indicates where you are typing your text? Well it is shown, at least, but it doesn't blink like it should.
I have an EDIT box created in WM_CREATE like so:
case WM_CREATE:
{
if(!logged) {
HWND userField = CreateWindow(
"EDIT", // Predefined class; Unicode assumed
NULL, // Button text
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT, // Styles
C_WIDTH/2 - 80, // x position
C_HEIGHT - 240, // y position
160, // Button width
25, // Button height
hwnd, // Parent window
NULL, // No menu.
(HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE),
NULL); // Pointer not needed.
// initialize NONCLIENTMETRICS structure
NONCLIENTMETRICS ncm;
ncm.cbSize = sizeof(ncm);
// obtain non-client metrics
SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(ncm), &ncm, 0);
// create the new font
HFONT hNewFont = CreateFontIndirect(&ncm.lfMessageFont);
// set the new font
SendMessage(userField, WM_SETFONT, (WPARAM)hNewFont, 0);
}
}
break;
That is all code concerning the edit box. I'm sorry if I'm not being clear enough or my supply of code is lacking; I'm unsure of what parts of code is relevant here and what are irrelevant. I don't think I should paste my whole code here, either.
The problem, again, is that the caret in the textbox (userField) does not blink.
Please ask for more details if you need them.
Using your code, I didn't get a flashing caret. But then i added:
SetFocus( userField );
and voilà, a flashing caret :-)
This may not be the problem the OP was experiencing, but I was experiencing the same symptom, and I'm posting my solution here in case someone else experiences this problem...
In short, if you subclass an edit control, and handle the WM_SETFOCUS event, you need to call DefSubclassProc() or your caret won't show up. Presumably, you can call ShowCaret() yourself, but you're probably safer just calling DefSubclassProc() in case there's other processing that needs to happen.
After playing around - making my code a bit tidier and stuff - I accidentally solved this on my own
I changed
HWND userField = CreateWindow(
"EDIT", // Predefined class; Unicode assumed
NULL, // Button text
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT, // Styles
C_WIDTH/2 - 80, // x position
C_HEIGHT - 240, // y position
160, // Button width
25, // Button height
hwnd, // Parent window
NULL, // No menu.
(HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE),
NULL); // Pointer not needed.
Into
HWND userField = CreateWindow("EDIT", NULL, WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT,
C_WIDTH/2 - 80, C_HEIGHT - 240, 160, 25, hwnd, NULL, g_hInstance, NULL);
The only difference there is the hInstance: in the first code it was apparently wrong. I changed it into my global reference of hInstance.
I'm having trouble opening a new CAxWindow inside my BHO, I can see the request to "microsoft.com" being fired but no window is shown.
I tried many different ways, this is my last, anyone has a clue what's wrong?
thanks.
CAxWindow m_axWindow;
CRect rc;
HWND wndIE = NULL;
m_pWebBrowser->get_HWND((SHANDLE_PTR*)&wndIE);
GetWindowRect(wndIE, &rc);
CSize sz = CSize(100, 200);
CRect rcPage = new CRect(10, 10, 10, 10);
m_axWindow.Create(wndIE, rcPage, _TEXT("http://www.microsoft.com"), WS_POPUP | WS_TABSTOP, 0, 0U, 0);
HRESULT hRet = m_axWindow.QueryControl(IID_IWebBrowser2, (void**)&m_pWebBrowser);
I think m_axWindow.Create creates a child window. Check its style for WS_CHILD after that call. You probably need to create a plain popup top-level window first, then create a CAxWindow using that popup window as parent, not the wndIE. Make sure to do ShowWindow on the pop-up, too.