gvplugin_xgtk.cpp

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#include <gtk/gtk.h>

#include <graphviz/gvc.h>
#include <graphviz/gvplugin.h>
#include <graphviz/gvplugin_device.h>
#include <graphviz/types.h>

#include <inttypes.h>

#include <cairo.h>

#include <iostream>

#include <X11/Xlib.h>
#include <X11/Xutil.h>

#include <signal.h>
#include <unistd.h>
#include <sys/time.h>
#include <stdio.h>
#include <string.h>

#include "callbacks.h"

#define GLADE_HOOKUP_OBJECT(component,widget,name) \
  g_object_set_data_full (G_OBJECT (component), name, \
    gtk_widget_ref (widget), (GDestroyNotify) gtk_widget_unref)

#define GLADE_HOOKUP_OBJECT_NO_REF(component,widget,name) \
  g_object_set_data (G_OBJECT (component), name, widget)

GtkWidget*lookup_widget(GtkWidget*widget,const gchar*widget_name)
{
        GtkWidget *parent, *found_widget;

        for (;;)
        {
                if (GTK_IS_MENU (widget))
                        parent = gtk_menu_get_attach_widget (GTK_MENU (widget));
                else
                        parent = widget->parent;
                
                if (!parent)
                        parent = (GtkWidget*) g_object_get_data (G_OBJECT (widget), "GladeParentKey");
                
                if (parent == NULL)
                        break;
                
                widget = parent;
        }

        found_widget = (GtkWidget*) g_object_get_data (G_OBJECT (widget),widget_name);
        
        if (!found_widget)
                g_warning ("Widget not found: %s", widget_name);
        
        return found_widget;
}

GtkWidget*create_window(void)
{
        GtkWidget *window;
        GtkWidget *drawingarea;

        window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
        gtk_window_set_title (GTK_WINDOW (window), "Tree Graph");

        drawingarea = gtk_drawing_area_new ();
        gtk_widget_show (drawingarea);  
        gtk_widget_set_size_request (drawingarea, 800, 800);
        gtk_container_add (GTK_CONTAINER (window), drawingarea);

        g_signal_connect ((gpointer) window, "delete_event",G_CALLBACK (WindowDeleteEvent),NULL);
        g_signal_connect ((gpointer) drawingarea, "expose_event",G_CALLBACK (DrawingareaExposeEvent),NULL);
        g_signal_connect ((gpointer) drawingarea, "motion_notify_event",G_CALLBACK (DrawingareaMotionNotifyEvent),NULL);
        g_signal_connect ((gpointer) drawingarea, "configure_event",G_CALLBACK (DrawingareaConfigureEvent),NULL);
        g_signal_connect ((gpointer) drawingarea, "button-press-event",G_CALLBACK (DrawingareaButtonPressEvent),NULL);
        g_signal_connect ((gpointer) drawingarea, "button-release-event",G_CALLBACK (DrawingareaButtonPressEvent),NULL);
        g_signal_connect ((gpointer) drawingarea, "scroll-event",G_CALLBACK (DrawingareaScrollEvent),NULL);

        gtk_widget_set_events (drawingarea, GDK_ENTER_NOTIFY_MASK |GDK_EXPOSURE_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK);
                                                                                                                 
        /* Store pointers to all widgets, for use by lookup_widget(). */
        GLADE_HOOKUP_OBJECT_NO_REF (window, window, "window");
        GLADE_HOOKUP_OBJECT (window, drawingarea, "drawingarea");

        return window;
}

gboolean Redraw(gpointer data)
{
        GtkWidget*window=(GtkWidget*)data;
        GtkWidget*drawingarea = lookup_widget (window, "drawingarea");
        
        if(drawGraph())
                gdk_window_invalidate_rect(drawingarea->window,&drawingarea->allocation,FALSE);
        return 1;
}

static void gtk_initialize(GVJ_t *firstjob)
{
        Display *dpy;
    const char *display_name = NULL;
    int scr;

        gtk_set_locale ();
    gtk_init (NULL, NULL);

        dpy = XOpenDisplay(display_name);
    if (dpy == NULL) {
        fprintf(stderr, "Failed to open XLIB display: %s\n",
                XDisplayName(NULL));
        return;
    }
    scr = DefaultScreen(dpy);
        
        firstjob->device_dpi.x = DisplayWidth(dpy, scr) * 25.4 / DisplayWidthMM(dpy, scr);
    firstjob->device_dpi.y = DisplayHeight(dpy, scr) * 25.4 / DisplayHeightMM(dpy, scr);
        
    firstjob->device_sets_dpi = TRUE;
}

static void gtk_finalize(GVJ_t *firstjob)
{
    GVJ_t *job;
    GtkWidget *window, *drawingarea;
        
    for (job = firstjob; job; job = job->next_active)
        {
                window = create_window();

                g_object_set_data(G_OBJECT(window), "job", (gpointer) job);

                drawingarea = lookup_widget (window, "drawingarea");
                g_object_set_data(G_OBJECT(drawingarea), "job", (gpointer) job);
                
                g_timeout_add(50,Redraw,window);
                
                gtk_widget_show (window);
    }
    
    gtk_main();
}

static gvdevice_engine_t device_engine_xgtk = {
    gtk_initialize,
    NULL,                       /* gtk_format */
    gtk_finalize,
};

static gvdevice_features_t device_features_xgtk = {
    GVDEVICE_DOES_TRUECOLOR     | GVDEVICE_EVENTS ,      /* flags */
    {0.,0.},                    /* default margin - points */
    {100.,100.},                    /* default page width, height - points */
    {96.,96.},                  /* dpi */
};

gvplugin_installed_t gvdevice_types_xgtk[] = {
    {0,(char*)"xgtk:cairo", 0, &device_engine_xgtk, &device_features_xgtk},
    {0, NULL, 0, NULL, NULL}
};

static gvplugin_api_t apis[] = {
    {API_device, gvdevice_types_xgtk},
    {(api_t)0, 0},
};

gvplugin_library_t gvplugin_xgtk_LTX_library = {(char*)"xgtk", apis };