--- /dev/null
+/* $Id$ $Revision$ */
+/* vim:set shiftwidth=4 ts=8: */
+
+/**********************************************************
+* This software is part of the graphviz package *
+* http://www.graphviz.org/ *
+* *
+* Copyright (c) 1994-2004 AT&T Corp. *
+* and is licensed under the *
+* Common Public License, Version 1.0 *
+* by AT&T Corp. *
+* *
+* Information and Software Systems Research *
+* AT&T Research, Florham Park NJ *
+**********************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+
+#include "const.h"
+#include "types.h"
+#include "macros.h"
+
+#include "render.h"
+
+#include "gvc.h"
+
+#define PANFACTOR 10
+#define ZOOMFACTOR 1.1
+#define EPSILON .0001
+
+#define ARRAY_SIZE(A) (sizeof(A)/sizeof(A[0]))
+
+typedef int (*key_callback_t) (gvrender_job_t * job);
+
+typedef struct key_binding {
+ char *key;
+ key_callback_t callback;
+} key_binding_t;
+
+/* callbacks */
+static int quit_cb(gvrender_job_t * job);
+static int left_cb(gvrender_job_t * job);
+static int right_cb(gvrender_job_t * job);
+static int up_cb(gvrender_job_t * job);
+static int down_cb(gvrender_job_t * job);
+static int zoom_in_cb(gvrender_job_t * job);
+static int zoom_out_cb(gvrender_job_t * job);
+static int toggle_fit_cb(gvrender_job_t * job);
+
+static key_binding_t key_binding[] = {
+ {"Q", quit_cb},
+ {"Left", left_cb},
+ {"KP_Left", left_cb},
+ {"Right", right_cb},
+ {"KP_Right", right_cb},
+ {"Up", up_cb},
+ {"KP_Up", up_cb},
+ {"Down", down_cb},
+ {"KP_Down", down_cb},
+ {"plus", zoom_in_cb},
+ {"KP_Add", zoom_in_cb},
+ {"minus", zoom_out_cb},
+ {"KP_Subtract", zoom_out_cb},
+ {"F", toggle_fit_cb},
+};
+
+void gvevent_refresh(gvrender_job_t * job)
+{
+ emit_graph(job->gvc, job->g, job->flags);
+}
+
+void gvevent_grow_pixmap(gvrender_job_t * job)
+{
+ Pixmap new;
+#if 0
+ cairo_surface_t *surface;
+#endif
+
+ new = XCreatePixmap(job->dpy, job->win, job->width, job->height,
+ job->depth);
+ XFillRectangle(job->dpy, new, job->gc, 0, 0,
+ job->width, job->height);
+ XCopyArea(job->dpy, job->pix, new, job->gc, 0, 0,
+ job->width, job->height, 0, 0);
+ XFreePixmap(job->dpy, job->pix);
+ job->pix = new;
+#if 0
+ surface = cairo_xlib_surface_create(job->dpy, job->pix, job->visual,
+ CAIRO_FORMAT_ARGB32, job->cmap);
+ cairo_set_target_surface(job->surface, surface);
+ cairo_surface_destroy(surface);
+#endif
+}
+
+void gvevent_button_press(gvrender_job_t * job, XButtonEvent *bev)
+{
+ switch (bev->button) {
+ case 1: /* select / create in edit mode */
+ case 2: /* pan */
+ case 3: /* / delete in edit mode */
+ job->click = 1;
+ job->active = bev->button;
+ job->needs_refresh = 1;
+ break;
+ case 4:
+ /* scrollwheel zoom in at current mouse x,y */
+ job->fit_mode = 0;
+ job->focus.x += (bev->x - job->width / 2.)
+ * (ZOOMFACTOR - 1.) / job->zoom;
+ job->focus.y += -(bev->y - job->height / 2.)
+ * (ZOOMFACTOR - 1.) / job->zoom;
+ job->zoom *= ZOOMFACTOR;
+ job->needs_refresh = 1;
+ break;
+ case 5: /* scrollwheel zoom out at current mouse x,y */
+ job->fit_mode = 0;
+ job->zoom /= ZOOMFACTOR;
+ job->focus.x -= (bev->x - job->width / 2.)
+ * (ZOOMFACTOR - 1.) / job->zoom;
+ job->focus.y -= -(bev->y - job->height / 2.)
+ * (ZOOMFACTOR - 1.) / job->zoom;
+ job->needs_refresh = 1;
+ break;
+ }
+ job->oldx = bev->x;
+ job->oldy = bev->y;
+}
+
+void gvevent_motion(gvrender_job_t * job, XMotionEvent *mev)
+{
+ double dx = mev->x - job->oldx;
+ double dy = mev->y - job->oldy;
+
+ if (abs(dx) < EPSILON && abs(dy) < EPSILON) /* ignore motion events with no motion */
+ return;
+
+ switch (job->active) {
+ case 0: /* drag with no button - */
+ return;
+ break;
+ case 1: /* drag with button 1 - drag object */
+ /* FIXME - to be implemented */
+ break;
+ case 2: /* drag with button 2 - pan graph */
+ job->focus.x -= dx / job->zoom;
+ job->focus.y -= -dy / job->zoom;
+ job->needs_refresh = 1;
+ break;
+ case 3: /* drag with button 3 - unused */
+ break;
+ }
+ job->oldx = mev->x;
+ job->oldy = mev->y;
+}
+
+void gvevent_button_release(gvrender_job_t *job, XButtonEvent *bev)
+{
+ job->click = 0;
+ job->active = 0;
+}
+
+int gvevent_key_press(gvrender_job_t * job, XKeyEvent * kev)
+{
+#if 0
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(key_binding); i++)
+ if (key_binding[i].keycode == kev->keycode)
+ return (key_binding[i].callback) (job);
+#endif
+ return 0;
+}
+
+static void gvevent_reconfigure_normal(gvrender_job_t * job, unsigned int width,
+ unsigned int height)
+{
+ int has_grown = 0;
+
+ if (width > job->width || height > job->height)
+ has_grown = 1;
+ job->width = width;
+ job->height = height;
+ if (has_grown)
+ gvevent_grow_pixmap(job);
+ job->needs_refresh = 1;
+}
+
+static void gvevent_reconfigure_fit_mode(gvrender_job_t * job, unsigned int width,
+ unsigned int height)
+{
+ int dflt_width, dflt_height;
+
+ dflt_width = job->width;
+ dflt_height = job->height;
+ job->zoom =
+ MIN((double) width / (double) dflt_width,
+ (double) height / (double) dflt_height);
+
+ gvevent_reconfigure_normal(job, width, height);
+}
+
+void gvevent_configure(gvrender_job_t * job, XConfigureEvent * cev)
+{
+ if (job->fit_mode)
+ gvevent_reconfigure_fit_mode(job, cev->width, cev->height);
+ else
+ gvevent_reconfigure_normal(job, cev->width, cev->height);
+}
+
+void gvevent_expose(gvrender_job_t * job, XExposeEvent * eev)
+{
+ XCopyArea(job->dpy, job->pix, job->win, job->gc,
+ eev->x, eev->y, eev->width, eev->height, eev->x, eev->y);
+}
+
+void gvevent_client_message(gvrender_job_t * job, XClientMessageEvent * cmev)
+{
+ if (cmev->format == 32
+ && (Atom) cmev->data.l[0] == job->wm_delete_window_atom)
+ exit(0);
+}
+
+static int quit_cb(gvrender_job_t * job)
+{
+ return 1;
+}
+
+static int left_cb(gvrender_job_t * job)
+{
+ job->fit_mode = 0;
+ job->focus.x += PANFACTOR / job->zoom;
+ job->needs_refresh = 1;
+ return 0;
+}
+
+static int right_cb(gvrender_job_t * job)
+{
+ job->fit_mode = 0;
+ job->focus.x -= PANFACTOR / job->zoom;
+ job->needs_refresh = 1;
+ return 0;
+}
+
+static int up_cb(gvrender_job_t * job)
+{
+ job->fit_mode = 0;
+ job->focus.y += -(PANFACTOR / job->zoom);
+ job->needs_refresh = 1;
+ return 0;
+}
+
+static int down_cb(gvrender_job_t * job)
+{
+ job->fit_mode = 0;
+ job->focus.y -= -(PANFACTOR / job->zoom);
+ job->needs_refresh = 1;
+ return 0;
+}
+
+static int zoom_in_cb(gvrender_job_t * job)
+{
+ job->fit_mode = 0;
+ job->zoom *= ZOOMFACTOR;
+ job->needs_refresh = 1;
+ return 0;
+}
+
+static int zoom_out_cb(gvrender_job_t * job)
+{
+ job->fit_mode = 0;
+ job->zoom /= ZOOMFACTOR;
+ job->needs_refresh = 1;
+ return 0;
+}
+
+static int toggle_fit_cb(gvrender_job_t * job)
+{
+ job->fit_mode = !job->fit_mode;
+ if (job->fit_mode) {
+ int dflt_width, dflt_height;
+ dflt_width = job->width;
+ dflt_height = job->height;
+ job->zoom =
+ MIN((double) job->width / (double) dflt_width,
+ (double) job->height / (double) dflt_height);
+ job->focus.x = 0.0;
+ job->focus.y = 0.0;
+ job->needs_refresh = 1;
+ }
+ return 0;
+}
projects / graphviz / commitdiff