text menu as created window behaviour of highlighting - c++

Question

I have created a Windows application. The elements that I create are using subclassing as I wanted to handle mouse hover events.
DWORD dwStyleOfIcons = SS_BITMAP | SS_NOTIFY | WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_BORDER;
img1 = CreateWindow(L"STATIC", NULL, dwStyleOfIcons,
posX, posY, imgWt, imgHt,
hWnd, (HMENU)ICON1_CLICKED, hInst, NULL);
SetWindowSubclass(img1, StaticSubClassWndProc, ICON1_CLICKED, 0);
In my StaticSubClassWndProc(), I handle WM_MOUSEMOVE, WM_MOUSELEAVE, and WM_MOUSEHOVER:
LRESULT CALLBACK StaticSubClassWndProc (HWND hwndsubclass, UINT msg, WPARAM wp, LPARAM lp, UINT_PTR uidsubclass , DWORD_PTR dwrefdata)
{
...
switch(Msg)
{
case WM_MOUSEHOVER: {
if(uidsubclass == ICON1_CLICKED){
texture = "texture2.bmp";
modifyImage(texture);
}
break;
}
case WM_MOUSELEAVE: {
if(uidsubclass == ICON1_CLICKED){
texture = "texture.bmp";
modifyImage(texture);
}
break;
}
There are many STATIC items in my application, which all I wanted the behavior of a pop up context menu, like when I hover over the image it changes to a selected image, and when the cursor is out of view the image changes back to normal. I was able to do that.
I was able to do this for images which act as icons, but how do I do it for static text controls? Essentially, in a pop up menu, the selected text is all highlighted:
Is there no simpler way to make my elements in this window behave like a pop up menu? All I want is this custom structure of pop up menu behavior.

Answer 1

I think you did not handle the TrackMouseEvent function correctly, which caused your child window to be unable to process the WM_MOUSEHOVER and WM_MOUSELEAVE messages.
I tested the following code and it worked for me:
HBITMAP hBmp1 = (HBITMAP)LoadImage(NULL, L"test1.bmp", IMAGE_BITMAP, 200, 300, LR_LOADFROMFILE);
HBITMAP hBmp2 = (HBITMAP)LoadImage(NULL, L"test2.bmp", IMAGE_BITMAP, 200, 300, LR_LOADFROMFILE);
HWND img1;
LRESULT CALLBACK StaticSubClassWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam, UINT_PTR uidsubclass, DWORD_PTR dwrefdata)
{
switch (msg)
{
case WM_MOUSEMOVE:
{
TRACKMOUSEEVENT lpEventTrack;
lpEventTrack.cbSize = sizeof(TRACKMOUSEEVENT);
lpEventTrack.dwFlags = TME_HOVER | TME_LEAVE;
lpEventTrack.hwndTrack = img1;
lpEventTrack.dwHoverTime = 100;
TrackMouseEvent(&lpEventTrack);
break;
}
case WM_MOUSEHOVER:
{
if (uidsubclass == ICON1_CLICKED) {
SendMessage(hwnd, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM)hBmp1);
}
break;
}
case WM_MOUSELEAVE:
{
if (uidsubclass == ICON1_CLICKED) {
SendMessage(hwnd, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM)hBmp2);
}
break;
}
default:
return DefSubclassProc(hwnd, msg, wParam, lParam);
}
}
But you need to be aware that WM_MOUSEHOVER and WM_MOUSELEAVE will trigger frequently, so I don't think you should use this method to load pictures when the mouse is hovered or left, which will frequently trigger the loading of pictures.