/* Copyright (C) 1999 Southern Gold Development <bruces@mail.petech.ac.za>
 *
 * 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 "gview.h"

gint doDragPic(GtkWidget *widget, GdkEventMotion *event, gpointer data) {
	sgview *view;
	gint inX, inY, val;
	GtkAdjustment *adj;
	
	view = (sgview *) data;
	if ((event->type == GDK_MOTION_NOTIFY) && (view->statCh & 0x04)) {
		inX = event->x_root;
		inY = event->y_root;
		if (inY != view->currY) {
			adj = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW (view->scr));
			val = adj->value;
			val = val - (inY - view->currY);
			if (val > adj->upper - adj->page_size)
				val = adj->upper - adj->page_size;
			if (val < adj->lower)
				val = adj->lower;
			gtk_adjustment_set_value(adj, val);
		}	
		if (inX != view->currX) {
			adj = gtk_scrolled_window_get_hadjustment(GTK_SCROLLED_WINDOW (view->scr));
			val = adj->value;
			val = val - (inX - view->currX);
			if (val > adj->upper - adj->page_size)
				val = adj->upper - adj->page_size;
			if (val < adj->lower)
				val = adj->lower;
			gtk_adjustment_set_value(adj, val);
		}
		view->currX = inX;
		view->currY = inY;
	}
	return FALSE;
}
		
gint startDragPic(GtkWidget *widget, GdkEventButton *event, gpointer data) {
	sgview *view;
	
	view = (sgview *) data;
	switch (event->button) {
		case 1:
			if (event->type == GDK_BUTTON_PRESS) {
				view->statCh = view->statCh | 0x04;
				view->currX = event->x_root;
				view->currY = event->y_root;
			}
			break;
		default:
			if (event->type == GDK_BUTTON_PRESS)
				popupPic(view, event);
			break;
	}
	return TRUE;
}

gint stopDragPic(GtkWidget *widget, GdkEventButton *event, gpointer data) {
	sgview *view;
	
	view = (sgview *) data;
	switch (event->button) {
		case 1:
			if (event->type == GDK_BUTTON_RELEASE)
				view->statCh = view->statCh & 0xfb;
			break;
		default:
			break;
	}
	return TRUE;
}