/*
 * CINELERRA
 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "bcdragwindow.h"
#include "bcpixmap.h"

#include "vframe.h"
#include <unistd.h>

BC_DragWindow::BC_DragWindow(BC_WindowBase *parent_window,
	BC_Pixmap *pixmap, int icon_x, int icon_y)
 : BC_Popup(parent_window, icon_x, icon_y, pixmap->get_w(), pixmap->get_h(),
	-1, 0, pixmap)
{
	drag_pixmap = 0;
	init_x = icon_x;
	init_y = icon_y;
	end_x = BC_INFINITY;
	end_y = BC_INFINITY;
	icon_offset_x = init_x - parent_window->get_abs_cursor_x(0);
	icon_offset_y = init_y - parent_window->get_abs_cursor_y(0);
//printf("BC_DragWindow::BC_DragWindow 1 %d %d\n", icon_offset_x, icon_offset_y);
	do_animation = 1;
}


BC_DragWindow::BC_DragWindow(BC_WindowBase *parent_window,
	VFrame *frame, int icon_x, int icon_y)
 : BC_Popup(parent_window, icon_x, icon_y, frame->get_w(), frame->get_h(),
	-1, 0, prepare_frame(frame, parent_window))
{
	init_x = icon_x;
	init_y = icon_y;
	end_x = BC_INFINITY;
	end_y = BC_INFINITY;
	icon_offset_x = init_x - parent_window->get_abs_cursor_x(0);
	icon_offset_y = init_y - parent_window->get_abs_cursor_y(0);
//printf("BC_DragWindow::BC_DragWindow 1 %d %d\n", icon_offset_x, icon_offset_y);
	do_animation = 1;
}

BC_DragWindow::~BC_DragWindow()
{
	delete drag_pixmap;
}

int BC_DragWindow::get_init_x(BC_WindowBase *parent_window, int icon_x)
{
	int output_x, temp = 0;
	Window tempwin;
	XTranslateCoordinates(parent_window->top_level->display,
		parent_window->win, parent_window->top_level->rootwin,
		icon_x, temp, &output_x, &temp, &tempwin);
	return output_x;
}

int BC_DragWindow::get_init_y(BC_WindowBase *parent_window, int icon_y)
{
	int output_y, temp = 0;
	Window tempwin;
	XTranslateCoordinates(parent_window->top_level->display,
		parent_window->win, parent_window->top_level->rootwin,
		temp, icon_y, &temp, &output_y, &tempwin);
	return output_y;
}

int BC_DragWindow::cursor_motion_event()
{
	int cx, cy;
	get_abs_cursor(cx, cy);
	reposition_window(cx + icon_offset_x, cy + icon_offset_y, get_w(), get_h());
	flush();
	return 1;
}

int BC_DragWindow::get_offset_x()
{
	return icon_offset_x;
}

int BC_DragWindow::get_offset_y()
{
	return icon_offset_y;
}

int BC_DragWindow::drag_failure_event()
{
	if(!do_animation) return 0;

	if(end_x == BC_INFINITY) {
		end_x = get_x();
		end_y = get_y();
	}

	for(int i = 0; i < 10; i++) {
		int new_x = end_x + (init_x - end_x) * i / 10;
		int new_y = end_y + (init_y - end_y) * i / 10;

		reposition_window(new_x, new_y, get_w(), get_h());
		flush();
		usleep(1000);
	}
	return 0;
}

void BC_DragWindow::set_animation(int value)
{
	this->do_animation = value;
}

BC_Pixmap *BC_DragWindow::prepare_frame(VFrame *frame, BC_WindowBase *parent_window)
{
	VFrame *temp_frame = 0;
	int tw = frame->get_w(), th = frame->get_h();

	if( frame->get_color_model() != BC_RGBA8888 ) {
		temp_frame = new VFrame(tw, th, BC_RGBA8888);
		temp_frame->transfer_from(frame);
	}
	else
		temp_frame = new VFrame(*frame);

	int tx = tw/2, ty = th/2, tx1 = tx-1, ty1 = ty-1, tx2 = tx+2, ty2 = ty+2;
	int bpp = BC_CModels::calculate_pixelsize(temp_frame->get_color_model());
	unsigned char **rows = temp_frame->get_rows();
	for( int y=ty1; y<ty2; ++y ) {
		for( int x=tx1; x<tx2; ++x ) {
			unsigned char *rp = rows[y] + x*bpp;
			rp[3] = 0; // alpha of center pixels = 0
		}
	}
	drag_pixmap = new BC_Pixmap(parent_window, temp_frame, PIXMAP_ALPHA);

	delete temp_frame;
	return drag_pixmap;
}