why the Tooltip isn't showed?

Question

3.20/5 (2 votes)

See more:

i update 1 function for create\use ToolTip:

C++

HWND CreateToolTip(HWND hwndTool, string text)
{

	/*INITCOMMONCONTROLSEX icc;

	icc.dwSize = sizeof(INITCOMMONCONTROLSEX);
	icc.dwICC = ICC_BAR_CLASSES | ICC_TAB_CLASSES | ICC_WIN95_CLASSES;

	InitCommonControlsEx(&icc);*/
	if (text=="")
	{
		return FALSE;
	}
	// Get the window of the tool.
	//HWND hwndTool = GetDlgItem(hDlg, toolID);

	// Create the tooltip. g_hInst is the global instance handle.
	HWND hwndTip = CreateWindowEx(0, TOOLTIPS_CLASS, NULL,
		TTS_ALWAYSTIP|WS_POPUP , //| TTS_BALLOON,
		CW_USEDEFAULT, CW_USEDEFAULT,
		CW_USEDEFAULT, CW_USEDEFAULT,
		GetParent(hwndTool), NULL,
		hinstance, NULL);

	if (!hwndTool || !hwndTip)
	{
	    MessageBox(NULL, "Couldn't create the ToolTip control.", "Error", MB_OK);
		return (HWND)NULL;
	}



	// Associate the tooltip with the tool.
	TOOLINFO toolInfo = { 0 };
	toolInfo.cbSize =sizeof (TOOLINFO);// TTTOOLINFOA_V1_SIZE;
	toolInfo.hwnd = GetParent(hwndTool);
	toolInfo.uFlags = TTF_IDISHWND | TTF_SUBCLASS;
	toolInfo.uId = (UINT_PTR)hwndTool;
	toolInfo.lpszText =(LPSTR) text.c_str();



	if (!SendMessage(hwndTip, TTM_ADDTOOL, 0, (LPARAM) (LPTOOLINFO) &toolInfo)) //Will add the Tool Tip on Control
    {
		int err = GetLastError();
		MessageBox(NULL,to_string(GetLastError()).c_str(), "Error", MB_OK);
	}

    if (SendMessage(hwndTip, TTM_ACTIVATE, TRUE,0)) //Will add the Tool Tip on Control
    {
		int err = GetLastError();
		MessageBox(NULL,to_string(GetLastError()).c_str(), "Error", MB_OK);

	}

	return hwndTip;
}

how is used:

C++

HWND tootip= CreateToolTip( lbltest , "hello");

these code works fine. but if i use WM_PAINT, with a child control, the ToolTip isn't showed or after several time is showed...
my question is(maybe can resolve the problem): what i must return with WM_PAINT?
i have read the MSDN documentation and they said for do:

C++

return 0;

but don't belive that it's corrected, because it can block the ToolTip :(

Posted 1-May-15 10:41am

Member 11545824

Add a Solution

Comments

[no name] 1-May-15 19:28pm

Make sure the parent window style includes WS_CLIPCHILDREN.

Member 11545824 2-May-15 8:25am

i have it.
please see these function:
<pre lang="c++">BYTE* Get24BitPixels(HBITMAP pBitmap, WORD *pwWidth, WORD *pwHeight)
{
// a bitmap object just to get bitmap width and height
BITMAP bmpBmp;

// pointer to original bitmap info
LPBITMAPINFO pbmiInfo;

// bitmap info will hold the new 24bit bitmap info
BITMAPINFO bmiInfo;

// width and height of the bitmap
WORD wBmpWidth, wBmpHeight;

// ---------------------------------------------------------
// get some info from the bitmap
// ---------------------------------------------------------
GetObject(pBitmap, sizeof(bmpBmp),&bmpBmp);
pbmiInfo = (LPBITMAPINFO)&bmpBmp;

// get width and height
wBmpWidth = (WORD)pbmiInfo->bmiHeader.biWidth;
wBmpWidth -= (wBmpWidth%4); // width is 4 byte boundary aligned.
wBmpHeight = (WORD)pbmiInfo->bmiHeader.biHeight;

// copy to caller width and height parms
*pwWidth = wBmpWidth;
*pwHeight = wBmpHeight;
// ---------------------------------------------------------

// allocate width * height * 24bits pixels
BYTE *pPixels = new BYTE[wBmpWidth*wBmpHeight*3];
if (!pPixels) return NULL;

// get user desktop device context to get pixels from
HDC hDC = GetWindowDC(NULL);

// fill desired structure
bmiInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmiInfo.bmiHeader.biWidth = wBmpWidth;
bmiInfo.bmiHeader.biHeight = -wBmpHeight;
bmiInfo.bmiHeader.biPlanes = 1;
bmiInfo.bmiHeader.biBitCount = 24;
bmiInfo.bmiHeader.biCompression = BI_RGB;
bmiInfo.bmiHeader.biSizeImage = wBmpWidth*wBmpHeight*3;
bmiInfo.bmiHeader.biXPelsPerMeter = 0;
bmiInfo.bmiHeader.biYPelsPerMeter = 0;
bmiInfo.bmiHeader.biClrUsed = 0;
bmiInfo.bmiHeader.biClrImportant = 0;

// get pixels from the original bitmap converted to 24bits
int iRes = GetDIBits(hDC,pBitmap,0,wBmpHeight,(LPVOID)pPixels,&bmiInfo,DIB_RGB_COLORS);

// release the device context
ReleaseDC(NULL,hDC);

// if failed, cancel the operation.
if (!iRes)
{
delete pPixels;
return NULL;
};

// return the pixel array
return pPixels;
}</pre>
do you see a memory leak with new\delete?
why? because 1 external program test the code and give me an error

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)