hedgewars/uCursor.pas
author alfadur
Tue, 29 May 2018 19:12:53 -0400
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child 13499 424944a835a7
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unit uCursor;
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interface
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procedure init;
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procedure resetPosition;
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procedure updatePosition;
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procedure handlePositionUpdate(x, y: LongInt);
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implementation
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uses SDLh, uVariables;
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procedure init;
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begin
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    resetPosition();
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end;
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procedure resetPosition;
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begin
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    // Move curser by 1px in case it's already centered.
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    // The game camera in the Alpha for 0.9.23 screwed up if
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    // the game started with the mouse already being centered.
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    // This fixes it, but we might have overlooked a related
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    // bug somewhere else.
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    // No big deal since this function is (so far) only called once.
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    SDL_WarpMouse((cScreenWidth div 2) + 1, cScreenHeight div 2);
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    SDL_WarpMouse(cScreenWidth div 2, cScreenHeight div 2);
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end;
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procedure updatePosition;
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var x, y: LongInt;
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begin
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    SDL_GetMouseState(@x, @y);
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    if(x <> cScreenWidth div 2) or (y <> cScreenHeight div 2) then
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    begin
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        handlePositionUpdate(x - cScreenWidth div 2, y - cScreenHeight div 2);
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        if cHasFocus then
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            SDL_WarpMouse(cScreenWidth div 2, cScreenHeight div 2);
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    end
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end;
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procedure handlePositionUpdate(x, y: LongInt);
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begin
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    CursorPoint.X:= CursorPoint.X + x;
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    CursorPoint.Y:= CursorPoint.Y - y;
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end;
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end.