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/*************************************************************************
* Copyright (c) 2011 AT&T Intellectual Property
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-v10.html
*
* Contributors: Details at https://graphviz.org
*************************************************************************/
#include "glmotion.h"
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <gtk/gtkgl.h>
#include <gdk/gdkcursor.h>
#include "draw.h"
#include <glcomp/glutils.h>
#include "hotkeymap.h"
#include <stdint.h>
/*real zoom in out is done here, all other functions send this one what they desire, it is not guranteed,*/
static void graph_zoom(double real_zoom) {
double old_zoom;
if (view->active_camera == SIZE_MAX)
old_zoom = view->zoom;
else
old_zoom = view->cameras[view->active_camera]->r;
if (real_zoom < view->Topview->fitin_zoom * MAX_ZOOM)
real_zoom = view->Topview->fitin_zoom * MAX_ZOOM;
if (real_zoom > view->Topview->fitin_zoom * MIN_ZOOM)
real_zoom = view->Topview->fitin_zoom * MIN_ZOOM;
if (view->active_camera == SIZE_MAX)
view->zoom = real_zoom;
else
view->cameras[view->active_camera]->r = real_zoom * -1;
/*adjust pan values */
view->panx = old_zoom * view->panx / real_zoom;
view->pany = old_zoom * view->pany / real_zoom;
}
void glmotion_zoom_inc(int zoomin)
{
if (zoomin) /*zooming in , zoom value should be decreased */
graph_zoom(view->zoom - view->zoom * 0.25);
else
graph_zoom(view->zoom + view->zoom * 0.25); /*zoom out */
glexpose();
}
void glmotion_zoom(void)
{
double real_zoom;
if (view->active_camera == SIZE_MAX) {
real_zoom =
view->zoom + view->mouse.dragX / 10 * (view->zoom * -1 / 20);
} else {
real_zoom =
(view->cameras[view->active_camera]->r +
view->mouse.dragX / 10 * (view->cameras[view->active_camera]->r /
20)) * -1;
}
graph_zoom(real_zoom);
}
void glmotion_pan(ViewInfo * v)
{
if (v->active_camera == SIZE_MAX) {
const double gldx = GetOGLDistance(v->mouse.dragX) / v->zoom * -1;
const double gldy = GetOGLDistance(v->mouse.dragY) / v->zoom * -1;
v->panx = v->panx - gldx;
v->pany = v->pany + gldy;
} else {
const double gldx = GetOGLDistance(v->mouse.dragX) / v->cameras[v->active_camera]->r;
const double gldy = GetOGLDistance(v->mouse.dragY) / v->cameras[v->active_camera]->r;
v->cameras[v->active_camera]->targetx -= gldx;
v->cameras[v->active_camera]->targety += gldy;
}
}
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