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directdraw and mouse pointer

Started by meynaf Nov 26, 2001 at 8:17 AM 5 replies 1.9k views

Original Post

Nov 26, 2001 at 8:17 AM

Hi, I have a DirectDraw application, which must work either in fullscreen or windowed (switch via alt-enter). Sometimes the mouse pointer flickers or leaves a trail under it (happens in both windowed and fullscreen, and this depends of the machine). And this only happens on some gfx boards, not all. On mine, it works perfectly. Shouldn''t directx be hiding the hardware differencies ? It obviously doesn''t

I can''t handle the mouse via DirectInput and draw it manually because of the windowed mode, so I''m forced to let Windows handle the mouse. I can''t believe nobody had this problem before. Help me please !!!

thedo

Nov 26, 2001 at 8:52 AM

Do you actually need to see the mouse pointer?
if NO then
ShowCursor(False);

if yes the why not :-

int x,y; //xand y mouse coords
ShowCursor(False); //Hide the ''proper cursor''
GetMouseXY(&x,&y); //Get the mouse cursor position
DrawDirectDrawSprite(x,y); //Draw a DirectDraw sprite as cursor

Neil

meynaf

Nov 26, 2001 at 9:12 AM

Of course I need to see it, the game is mouse based !!
And I can''t replace the mouse pointer by a sprite, because the pointer can go outside my window in windowed mode.

thedo

Nov 26, 2001 at 9:44 AM

OK Check to see if the mouse is in the Directdraw window and write the above code. When not in the window show the ''Windows'' cursor. Unfortunately there''s not much else you can do. It''s not a DirectX thang, it''s a bad driver thang.

Neil

Kwizatz

Nov 26, 2001 at 10:17 AM

thedo is right, use GetWindowRect to get the window position and proportions, then you do something like (using thedo's code):

  
HWND hWnd; //this is a global variable that contains the main window handle

int x,y; //xand y mouse coords

RECT rect;

GetMouseXY(&x,&y); //Get the mouse cursor position 

GetWindowRect(hWnd,▭)
if ((x<rect.left)||(x>rect.right)||(y<rect.top)||(y>rect.bottom)) //boundary check if this is true use windows cursor

{
ShowCursor(true); //Show the 'proper cursor'

}
else // we are inside the window draw a ddraw cursor

{
ShowCursor(false); //Hide the 'proper cursor'

DrawDirectDrawSprite(x,y); //Draw a DirectDraw sprite as cursor

}

and thats pretty much it, you might want to use GetCursorPos

Edited by - kwizatz on November 26, 2001 11:18:42 AM

meynaf

Nov 26, 2001 at 10:49 AM

Ok I''ll test this... but I fear a lack of responsiveness from the mouse pointer, because the program''s refresh rate is not quite high

Kwizatz

Nov 26, 2001 at 2:43 PM

now that I think about it, you can check whether the cursor is shown or not

  
HWND hWnd; //this is a global variable that contains the main window handle

BOOL bWinCursor = TRUE; //Global variable to keep track

int x,y; //xand y mouse coords

RECT rect;
GetMouseXY(&x,&y); //Get the mouse cursor position 

GetWindowRect(hWnd,▭)
if ((x<rect.left)||(x>rect.right)||(y<rect.top)||(y>rect.bottom)) //boundary check if this is true use windows cursor

{
    if(!bWinCursor)
    {
        bWinCursor=TRUE;
        ShowCursor(bWinCursor); //Show the ''proper cursor''

   }
}
else // we are inside the window draw a ddraw cursor

{
    if(bWinCursor)
    {
        bWinCursor=FALSE;
        ShowCursor(bWinCursor); //Hide the ''proper cursor''

   }
DrawDirectDrawSprite(x,y); //Draw a DirectDraw sprite as cursor

}

its getting complicated, I just coded that, so its not tested, you have been warned

anyway is just so you get an idea

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