views.c

#include <stdio.h>
#include <stdlib.h>

#include "views.h"
#include "list.h"
#include "geometry.h"
#include "ui_elem.h"
#include "cga.h"
#include "canvas.h"

int viewport_x = 0;
int viewport_y = 0;

extern unsigned char selected_char; 

extern unsigned char selected_fore_color;
extern unsigned char selected_back_color;
extern unsigned char selected_blink;

extern int current_border_color_fore;
extern int current_border_color_back;

int UI_SHOW_EXIT = 0;

int current_view = VIEW_CANVAS;

int get_viewport_x()
{
	return viewport_x;
}

int get_viewport_y()
{
	return viewport_y;
}

int get_current_view()
{
	return current_view;
}

void set_current_view(int view)
{
	current_view = view;
}

void show_ui()
{
	int i, j;

	LIST * active_windows;

	active_windows = get_active_windows();
	
	for(i = 0; i < len_list(active_windows); i++)
	{
		WINDOW * current_window = get_list_at(active_windows, i);

		draw_window_shadowed(current_window);

		for(j = 0; j < len_list(current_window->button_list); j++)
		{
			BUTTON * current_button = get_list_at(current_window->button_list, j);

			draw_button(current_button);
		}
	}
}

void view_canvas()
{
	RECT area_source;
	RECT image_source;
	RECT area_dest;
	RECT image_dest;

	area_source = rect( viewport_x, viewport_y, SCREEN_SIZE_X, SCREEN_SIZE_Y);
	image_source = rect( 0, 0, CANVAS_SIZE_X, CANVAS_SIZE_Y);
	area_dest = rect( 0, 0, SCREEN_SIZE_X, SCREEN_SIZE_Y);
	image_dest = rect( 0, 0, SCREEN_SIZE_X, SCREEN_SIZE_Y);

	copy_area_from_image(get_canvas_address(), get_page_address(1),
						 area_source,
						 image_source,
						 area_dest,
						 image_dest);

}

void move_viewport(int delta_x, int delta_y)
{
	if(viewport_x + delta_x < 0)
	{
		viewport_x = 0;
	}
	else if((viewport_x + SCREEN_SIZE_X) + delta_x > CANVAS_SIZE_X)
	{
		viewport_x = CANVAS_SIZE_X - SCREEN_SIZE_X;
	}
	else if(viewport_y + delta_y < 0)
	{
		viewport_y = 0;
	}
	else if((viewport_y + SCREEN_SIZE_Y) + delta_y > CANVAS_SIZE_Y)
	{
		viewport_y = CANVAS_SIZE_Y - SCREEN_SIZE_Y;
	}
	else
	{
		if(viewport_x + delta_x >= 0 && (viewport_x + SCREEN_SIZE_X) + delta_x <= CANVAS_SIZE_X)
		{
			viewport_x += delta_x;
		}
		else if(viewport_y + delta_y >= 0 && (viewport_y + SCREEN_SIZE_Y) + delta_y <= CANVAS_SIZE_Y)
		{
			viewport_y += delta_y;
		}
	}
}