Drag and Drop on a sprite - GameCreators Forum

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dimy93

15

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Joined: 10th Jul 2009

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Posted: 10th Jul 2009 13:50

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How can I do a drag and drop effect on a sprite with the gdk?I assume that can be done with a set of funcions:
1.Funcion for mouse button that has been clicked -I already found one
2.Funcion of changing the possion of the sprite-I thought I have found it but apparently I haven't.
3.Funcion that founds where the mouse is in the moment
4.Funcion that returns the change into the place of the mouse on the screen-I have found this one too.
So please tell me which are 2nd and 3rd funcion or other funcion that makes it all in one.
Sorry for my bad English and thax for the help in advance.

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dimy93

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Joined: 10th Jul 2009

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Posted: 10th Jul 2009 16:38

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I think I've done it my self.

Here is the code if s.o needs it

+ Code Snippet

bool IsInMouseArea(unsigned short XStart,unsigned short YStart,unsigned short XEnd,unsigned short YEnd,unsigned short& MouseX,unsigned short& MouseY)
{
	if (dbMouseClick()== 1 && dbMouseX()>= XStart && dbMouseY()>= YStart && dbMouseX()<=XEnd && dbMouseY()<=YEnd)
	{
		MouseX = dbMouseX() - XStart;
		MouseY = dbMouseY() - YStart; 
		return true;
	}
	else 
		return false;
}
			unsigned short MouseX,MouseY;
			if( IsInMouseArea(dbSpriteX(i),dbSpriteY(i),dbSpriteX(i) + dbSpriteWidth (i) ,dbSpriteY(i) + dbSpriteHeight (i),MouseX,MouseY ))
			while (dbMouseClick()== 1)
			{
				if (i <= 16)
					dbSprite (i,dbMouseX () - MouseX ,dbMouseY () - MouseY ,2);
				else
					dbSprite (i,dbMouseX () - MouseX ,dbMouseY () - MouseY ,3);	
				dbSync ( );
			}

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Krisacz

15

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Joined: 3rd Mar 2009

Location: UK, Manchester

Posted: 10th Jul 2009 17:44 Edited at: 10th Jul 2009 17:45

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Try that function, I'm not sure if it's working, I didn't have chance to test it but general idea I thing is ok.

+ Code Snippet

void DragDrop(int SpriteID, int ImageID)
{
	SX = dbSpriteX( SpriteID );
	SY = dbSpriteY( SpriteID );
	SW = dbSpriteWidth( SpriteID );
	SH = dbSpriteHeight( SpriteID );

	bool MouseOnSprite;
	bool MouseClicked;

	
	//--- CHECKING MOUSE POSITION ---		
	if( ( dbMouseX() >= SX )&&( dbMouseX() <= SX+SW )&&( dbMouseY() >= SY )&&( dbMouseY() <= SY+SH ) )
	{
		MouseOnSprite = true;
	}
	else
	{
		MouseOnSprite = false;	
	}

	//--- CHECKING IF MOUSE IS PRESSED ---
	if( dbMouseClicked() == 1 )
	{
		MouseClicked = true;
	}
	else
	{
		MouseClicked = false;
	}

	//--- DRAG & DROP ---
	if( ( MouseOnSprite == true )&&( MouseClicked == true ) )
	{
		SX += dbMouseMoveX();
		SY += dbMouseMoveY();
		dbSprtite( SpriteID, SX, SY, ImageID);		
	}
}

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