IT-HE RPG Engine Code

//
//      Mouse and button support in the game
//

#include <allegro.h>
#include <string.h>
#include "media.h"
#include "core.hpp"
#include "mouse.h"
#include "console.h"
#include "init.h"
#include "gamedata.h"

// Defines

// Variables

MOUSERANGE MouseRange[MAX_MBUTTONS]; // Mouse 'buttons'
static MOUSERANGE MouseBackup[MAX_MBUTTONS]; // Backup copy of the ranges
int MouseOver,MouseRanges,MouseBackups;
long MouseID=-1,MouseGridX=-1,MouseGridY=-1;
long MouseMapX=-1,MouseMapY=-1;

// Funcs

/*
 *  Mouse Support
 */


void WaitForMouseRelease()
{
do
	{
//	S_PollMusic();
	if(poll_mouse()<0) // No mouse
		return;
	} while(mouse_b);
return;
}

// Reset button system

void ClearMouseRanges()
{
MouseRanges=-1;
MouseOver=0;
}

// MouseOver?

void AddMouseRange(int ID, int x, int y, int w, int h)
{
if(MouseRanges>=MAX_MBUTTONS)
	return;
if(MouseRanges<0)
	MouseRanges=0;

MouseRange[MouseRanges].left = x;
MouseRange[MouseRanges].top = y;
MouseRange[MouseRanges].right = x+w;
MouseRange[MouseRanges].bottom= y+h;
MouseRange[MouseRanges].id = ID;
MouseRange[MouseRanges].flags = RANGE_LBUTTON; // Assume left button
MouseRange[MouseRanges].pointer= 0; // No mouse over
MouseRange[MouseRanges].normal = NULL;
MouseRange[MouseRanges].in = NULL;
MouseRanges++;
}

// Is it a grid?

void SetRangeGrid(int ID, int w, int h)
{
int ctr;
for(ctr=0;ctr<MouseRanges;ctr++)
	if(MouseRange[ctr].id == ID)
		{
		MouseRange[ctr].flags |= RANGE_GRID;
		// Safety checks (these will be divisors later on)
		if(w<1)
			w=1;
		if(h<1)
			h=1;
		MouseRange[ctr].gw = w;
		MouseRange[ctr].gh = h;
		return;
		}
}

// Is it a button?

void SetRangeButton(int ID, char *normal, char *in)
{
int ctr,n,i;

n=getnum4sprite(normal);
i=getnum4sprite(in);

// If we can't find the normal button, scream
if(n == -1)
	{
	Bug("Set button %d: Can't find sprite %s\n",ID,normal);
	return;
	}

// If the 'in' button can't be found, use the default
if(i == -1)
	i=n;

for(ctr=0;ctr<MouseRanges;ctr++)
	if(MouseRange[ctr].id == ID)
		{
		MouseRange[ctr].flags |= RANGE_BUTTON;
		MouseRange[ctr].normal = SPlist[n].image;
		MouseRange[ctr].in = SPlist[i].image;
		MouseRange[ctr].right = MouseRange[ctr].left+SPlist[n].w;
		MouseRange[ctr].bottom= MouseRange[ctr].top+SPlist[n].h;
		return;
		}
}

// Make it right-clickable

void RightClick(int ID)
{
int ctr;

for(ctr=0;ctr<MouseRanges;ctr++)
	if(MouseRange[ctr].id == ID)
		{
		MouseRange[ctr].flags &= ~RANGE_LBUTTON;
		MouseRange[ctr].flags |= RANGE_RBUTTON;
		return;
		}
}


// MouseOver?

void SetRangePointer(int ID, int pointerno)
{
int ctr;
for(ctr=0;ctr<MouseRanges;ctr++)
	if(MouseRange[ctr].id == ID)
		{
		MouseRange[ctr].pointer = pointerno;
		MouseOver=1; // We now have a MouseOver event
		return;
		}
}

// Check mouse range

void CheckMouseRanges()
{
int MX,MY,MB,a,ctr;
static BITMAP *mptr=NULL,*optr=NULL;

MouseID=-1;

if(poll_mouse()<0) // No mouse
	return;

//ilog_printf("Check Mouse Range\n");

// Grab the mouse coordinates (they are volatile may change)
MB=mouse_b;
MX=mouse_x;
MY=mouse_y;
/*
// In fact, let's smash them now
mouse_b=0;
mouse_x=0;
mouse_y=0;
*/

// Nothing selected
MouseID=-1;
MouseGridX=-1;
MouseGridY=-1;

DrawButtons();

mptr=NULL; // Assume default pointer

// Do we need to check all the ranges for a mouse-over event?

if(MouseOver && MouseOverPtr)
	{
	for(ctr=0;ctr<=MouseRanges;ctr++)
		if(MouseRange[ctr].pointer)
			if(MX > MouseRange[ctr].left && MX < MouseRange[ctr].right)
				if(MY > MouseRange[ctr].top && MY < MouseRange[ctr].bottom)
					mptr=MouseOverPtr;
	}

// Check left button click
if(MB & 1)
	{
	// There was a mouse click, scan the ranges
	for(ctr=0;ctr<=MouseRanges;ctr++)
		{
		if(MouseRange[ctr].flags & RANGE_LBUTTON)
			{
			if(MX > MouseRange[ctr].left && MX < MouseRange[ctr].right)
				if(MY > MouseRange[ctr].top && MY < MouseRange[ctr].bottom)
					{
					// If it is a grid, calculate selected cell
					if(MouseRange[ctr].flags & RANGE_GRID)
						{
						a=MX-MouseRange[ctr].left; // Get grid offset
						MouseGridX=a/MouseRange[ctr].gw;
						a=MY-MouseRange[ctr].top; // Get grid offset
						MouseGridY=a/MouseRange[ctr].gh;
						MouseMapX=MouseGridX+mapx;
						a=MY-MouseRange[ctr].top; // Get grid offset
						MouseMapY=MouseGridY+mapy;
						}
					// return the corresponding ID
					MouseID=MouseRange[ctr].id;
					return;
					}
			}
		}
	}


// Check rightbutton click
if(MB & 2)
	{
	// There was a mouse click, scan the ranges
	for(ctr=0;ctr<=MouseRanges;ctr++)
		{
		if(MouseRange[ctr].flags & RANGE_RBUTTON)
			if(MX > MouseRange[ctr].left && MX < MouseRange[ctr].right)
				if(MY > MouseRange[ctr].top && MY < MouseRange[ctr].bottom)
					{
					// If it is a grid, calculate selected cell
					if(MouseRange[ctr].flags & RANGE_GRID)
						{
						a=MX-MouseRange[ctr].left; // Get grid offset
						MouseGridX=a/MouseRange[ctr].gw;
						a=MY-MouseRange[ctr].top; // Get grid offset
						MouseGridY=a/MouseRange[ctr].gh;
						MouseMapX=MouseGridX+mapx;
						a=MY-MouseRange[ctr].top; // Get grid offset
						MouseMapY=MouseGridY+mapy;
						}
					// return the corresponding ID
					MouseID=MouseRange[ctr].id;
					return;
					}
		}
	}


// Choose new pointer if it has changed
if(mptr != optr)
	{
	set_mouse_sprite(mptr);
	optr=mptr;
	}

}

void DrawButtons()
{
int ctr;

for(ctr=0;ctr<=MouseRanges;ctr++)
	{
	if(MouseRange[ctr].flags & RANGE_BUTTON)
		{
		if(MouseRange[ctr].flags & RANGE_BUTTONIN)
			draw_rle_sprite(swapscreen,MouseRange[ctr].in,MouseRange[ctr].left,MouseRange[ctr].top);
		else
			draw_rle_sprite(swapscreen,MouseRange[ctr].normal,MouseRange[ctr].left,MouseRange[ctr].top);
		}
	}
}

// For debugging only

void DrawRanges()
{
int ctr;

for(ctr=0;ctr<=MouseRanges;ctr++)
	rect(swapscreen,MouseRange[ctr].left,MouseRange[ctr].top,MouseRange[ctr].right,MouseRange[ctr].bottom,makecol(255,0,0));
}

// Is it a grid?

void PushButton(int ID, int state)
{
int ctr;
for(ctr=0;ctr<MouseRanges;ctr++)
	if(MouseRange[ctr].id == ID)
		{
		if(!(MouseRange[ctr].flags & RANGE_BUTTON))
			return;
		if(state)
			MouseRange[ctr].flags |= RANGE_BUTTONIN;
		else
			MouseRange[ctr].flags &= ~RANGE_BUTTONIN;
		return;
		}
}

/*
 *  Save Ranges
 */

void SaveRanges()
{
memcpy(MouseBackup,MouseRange,sizeof(MouseRange));
MouseBackups=MouseRanges;
}

/*
 *  Save Ranges
 */

void RestoreRanges()
{
memcpy(MouseRange,MouseBackup,sizeof(MouseRange));
MouseRanges=MouseBackups;
}