Re: gtk_connect_signal_object HELP PLEASE !

["Billy N. Patton" <bpatton dal asp ti com>]

I'm trying to get the xy coords, while cursor is on canvas, to display
those coords in the status bar.

Here's my program :  Please HELP !

#include "gtk/gtk.h"

static gint       context_id;
static GdkPixmap  *pixmap = NULL;
static int        canvas_x;
static int        canvas_y;
laff_db           *db;
cell_p            fcellp;
            
/* Create a new backing pixmap of the appropriate size */
static gint configure_event( GtkWidget         *widget,
                             GdkEventConfigure *event )
{
  if (pixmap)
    gdk_pixmap_unref(pixmap);

  canvas_x = widget->allocation.width;
  canvas_y = widget->allocation.height;
  pixmap = gdk_pixmap_new(widget->window,
                          widget->allocation.width,
                          widget->allocation.height,
                          -1);
  gdk_draw_rectangle (pixmap,
                      widget->style->black_gc,
                      TRUE,
                      0, 0,
                      widget->allocation.width,
                      widget->allocation.height);

  return TRUE;
}

/* Redraw the screen from the backing pixmap */
static gint expose_event( GtkWidget      *widget,GdkEventExpose *event )
{
  gdk_draw_pixmap(widget->window,
                  widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
                  pixmap,
                  event->area.x, event->area.y,
                  event->area.x, event->area.y,
                  event->area.width, event->area.height);

  return FALSE;
}

static void draw_brush( GtkWidget *widget,gdouble x,gdouble y)
{
  GdkRectangle update_rect;

  update_rect.x = x - 5;
  update_rect.y = y - 5;
  update_rect.width = 10;
  update_rect.height = 10;
  gdk_draw_rectangle (pixmap,widget->style->black_gc,TRUE,
                      update_rect.x, update_rect.y,
                      update_rect.width, update_rect.height);
  gtk_widget_draw (widget, &update_rect);
}

static gint motion_notify_event( GtkWidget *widget,GdkEventMotion *event 
                                )
{
  int             x, y;
  GdkModifierType state;
  gchar           buffer[64];
  static gint     message_id = INT_MIN;

  if (event->is_hint)
    gdk_window_get_pointer (event->window, &x, &y, &state);
  else
    {
      x = event->x;
      y = event->y;
      state = event->state;
    }
  sprintf(buffer,"XY : %d,%d",x,y);
  g_print("buffer = %s\n",buffer);

  if (message_id NE INT_MIN) 
    gtk_statusbar_remove(GTK_STATUSBAR(widget)
                       ,context_id,message_id);
   message_id = gtk_statusbar_push(GTK_STATUSBAR(widget)
                                  ,context_id,buffer);
  return TRUE;
}

int main( int   argc,char *argv[] )
{
  GtkWidget       *mw,*menu_bar,*vbox,*drawing_area,*status_bar;

  gtk_init (&argc, &argv);

  mw = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (mw), "LaffEdit");
  gtk_signal_connect(GTK_OBJECT (mw), "delete_event"
                    ,(GtkSignalFunc) gtk_main_quit, NULL);

  vbox = gtk_vbox_new(FALSE, 5);
  gtk_container_add(GTK_CONTAINER(mw), vbox);
  gtk_widget_show(vbox);
 
  menu_bar = gtk_menu_bar_new();
  gtk_box_pack_start(GTK_BOX(vbox), menu_bar,FALSE,TRUE,0);
  gtk_widget_show(menu_bar);
 
  drawing_area = gtk_drawing_area_new();
  gtk_box_pack_start(GTK_BOX(vbox), drawing_area,FALSE,TRUE,0);
  gtk_drawing_area_size(GTK_DRAWING_AREA(drawing_area),400,200);

  gtk_widget_show(drawing_area);

  gtk_signal_connect (GTK_OBJECT (drawing_area), "expose_event",
                      (GtkSignalFunc) expose_event, NULL);
  gtk_signal_connect (GTK_OBJECT(drawing_area),"configure_event",
                      (GtkSignalFunc) configure_event, NULL);

  gtk_widget_set_events (drawing_area
                        ,   GDK_EXPOSURE_MASK
                          | GDK_LEAVE_NOTIFY_MASK
                          | GDK_BUTTON_PRESS_MASK
                          | GDK_POINTER_MOTION_MASK
                          | GDK_POINTER_MOTION_HINT_MASK);

  status_bar = gtk_statusbar_new();
  gtk_container_add(GTK_CONTAINER(vbox), status_bar);
  gtk_widget_set_usize(status_bar,400,30);
  context_id = gtk_statusbar_get_context_id(GTK_STATUSBAR(status_bar),"MyId");
  gtk_signal_connect_object(GTK_OBJECT (status_bar)
                           ,"motion_notify_event"
                           ,(GtkSignalFunc) motion_notify_event 
                           ,GTK_OBJECT (drawing_area));
  gtk_widget_show(status_bar);

  gtk_widget_show  (mw);

  gtk_main ();
  
  return(0);
}

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Texas Instruments ASIC Circuit Design Methology Group
Dallas, Texas
214-480-4455
bpatton dal asp ti com
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