/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#undef GTK_DISABLE_DEPRECATED
#include "config.h"
#include <stdio.h>
#include "gtk/gtk.h"
/* Backing pixmap for drawing area */
static GdkPixmap *pixmap = NULL;
/* Information about cursor */
static gint cursor_proximity = TRUE;
static gdouble cursor_x;
static gdouble cursor_y;
/* Unique ID of current device */
static GdkDevice *current_device;
/* Erase the old cursor, and/or draw a new one, if necessary */
static void
update_cursor (GtkWidget *widget, gdouble x, gdouble y)
{
static gint cursor_present = 0;
gint state = !current_device->has_cursor && cursor_proximity;
if (pixmap != NULL)
{
cairo_t *cr = gdk_cairo_create (widget->window);
if (cursor_present && (cursor_present != state ||
x != cursor_x || y != cursor_y))
{
gdk_cairo_set_source_pixmap (cr, pixmap, 0, 0);
cairo_rectangle (cr, cursor_x - 5, cursor_y - 5, 10, 10);
cairo_fill (cr);
}
cursor_present = state;
cursor_x = x;
cursor_y = y;
if (cursor_present)
{
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_rectangle (cr,
cursor_x - 5, cursor_y -5,
10, 10);
cairo_fill (cr);
}
cairo_destroy (cr);
}
}
/* Create a new backing pixmap of the appropriate size */
static gint
configure_event (GtkWidget *widget, GdkEventConfigure *event)
{
cairo_t *cr;
if (pixmap)
g_object_unref (pixmap);
pixmap = gdk_pixmap_new(widget->window,
widget->allocation.width,
widget->allocation.height,
-1);
cr = gdk_cairo_create (pixmap);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_destroy (cr);
return TRUE;
}
/* Refill the screen from the backing pixmap */
static gint
expose_event (GtkWidget *widget, GdkEventExpose *event)
{
cairo_t *cr = gdk_cairo_create (widget->window);
gdk_cairo_set_source_pixmap (cr, pixmap, 0, 0);
gdk_cairo_rectangle (cr, &event->area);
cairo_fill (cr);
cairo_destroy (cr);
return FALSE;
}
/* Draw a rectangle on the screen, size depending on pressure,
and color on the type of device */
static void
draw_brush (GtkWidget *widget, GdkInputSource source,
gdouble x, gdouble y, gdouble pressure)
{
GdkColor color;
GdkRectangle update_rect;
cairo_t *cr;
switch (source)
{
case GDK_SOURCE_MOUSE:
color = widget->style->dark[gtk_widget_get_state (widget)];
break;
case GDK_SOURCE_PEN:
color.red = color.green = color.blue = 0;
break;
case GDK_SOURCE_ERASER:
color.red = color.green = color.blue = 65535;
break;
default:
color = widget->style->light[gtk_widget_get_state (widget)];
}
update_rect.x = x - 10 * pressure;
update_rect.y = y - 10 * pressure;
update_rect.width = 20 * pressure;
update_rect.height = 20 * pressure;
cr = gdk_cairo_create (pixmap);
gdk_cairo_set_source_color (cr, &color);
gdk_cairo_rectangle (cr, &update_rect);
cairo_fill (cr);
cairo_destroy (cr);
gtk_widget_queue_draw_area (widget,
update_rect.x, update_rect.y,
update_rect.width, update_rect.height);
gdk_window_process_updates (widget->window, TRUE);
}
static guint32 motion_time;
static void
print_axes (GdkDevice *device, gdouble *axes)
{
int i;
if (axes)
{
g_print ("%s ", device->name);
for (i=0; i<device->num_axes; i++)
g_print ("%g ", axes[i]);
g_print ("\n");
}
}
static gint
button_press_event (GtkWidget *widget, GdkEventButton *event)
{
current_device = event->device;
cursor_proximity = TRUE;
if (event->button == 1 && pixmap != NULL)
{
gdouble pressure = 0.5;
print_axes (event->device, event->axes);
gdk_event_get_axis ((GdkEvent *)event, GDK_AXIS_PRESSURE, &pressure);
draw_brush (widget, event->device->source, event->x, event->y, pressure);
motion_time = event->time;
}
update_cursor (widget, event->x, event->y);
return TRUE;
}
static gint
key_press_event (GtkWidget *widget, GdkEventKey *event)
{
if ((event->keyval >= 0x20) && (event->keyval <= 0xFF))
printf("I got a %c\n", event->keyval);
else
printf("I got some other key\n");
return TRUE;
}
static gint
motion_notify_event (GtkWidget *widget, GdkEventMotion *event)
{
GdkTimeCoord **events;
int n_events;
int i;
current_device = event->device;
cursor_proximity = TRUE;
if (event->state & GDK_BUTTON1_MASK && pixmap != NULL)
{
if (gdk_device_get_history (event->device, event->window,
motion_time, event->time,
&events, &n_events))
{
for (i=0; i<n_events; i++)
{
double x = 0, y = 0, pressure = 0.5;
gdk_device_get_axis (event->device, events[i]->axes, GDK_AXIS_X, &x);
gdk_device_get_axis (event->device, events[i]->axes, GDK_AXIS_Y, &y);
gdk_device_get_axis (event->device, events[i]->axes, GDK_AXIS_PRESSURE, &pressure);
draw_brush (widget, event->device->source, x, y, pressure);
print_axes (event->device, events[i]->axes);
}
gdk_device_free_history (events, n_events);
}
else
{
double pressure = 0.5;
gdk_event_get_axis ((GdkEvent *)event, GDK_AXIS_PRESSURE, &pressure);
draw_brush (widget, event->device->source, event->x, event->y, pressure);
}
motion_time = event->time;
}
if (event->is_hint)
gdk_device_get_state (event->device, event->window, NULL, NULL);
print_axes (event->device, event->axes);
update_cursor (widget, event->x, event->y);
return TRUE;
}
/* We track the next two events to know when we need to draw a
cursor */
static gint
proximity_out_event (GtkWidget *widget, GdkEventProximity *event)
{
cursor_proximity = FALSE;
update_cursor (widget, cursor_x, cursor_y);
return TRUE;
}
static gint
leave_notify_event (GtkWidget *widget, GdkEventCrossing *event)
{
cursor_proximity = FALSE;
update_cursor (widget, cursor_x, cursor_y);
return TRUE;
}
void
input_dialog_destroy (GtkWidget *w, gpointer data)
{
*((GtkWidget **)data) = NULL;
}
void
create_input_dialog (void)
{
static GtkWidget *inputd = NULL;
if (!inputd)
{
inputd = gtk_input_dialog_new ();
g_signal_connect (inputd, "destroy",
G_CALLBACK (input_dialog_destroy), &inputd);
g_signal_connect_swapped (GTK_INPUT_DIALOG (inputd)->close_button,
"clicked",
G_CALLBACK (gtk_widget_hide),
inputd);
gtk_widget_hide (GTK_INPUT_DIALOG (inputd)->save_button);
gtk_widget_show (inputd);
}
else
{
if (!gtk_widget_get_mapped(inputd))
gtk_widget_show(inputd);
else
gdk_window_raise(inputd->window);
}
}
void
quit (void)
{
gtk_main_quit ();
}
int
main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *drawing_area;
GtkWidget *vbox;
GtkWidget *button;
gtk_init (&argc, &argv);
current_device = gdk_device_get_core_pointer ();
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_name (window, "Test Input");
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
gtk_widget_show (vbox);
g_signal_connect (window, "destroy",
G_CALLBACK (quit), NULL);
/* Create the drawing area */
drawing_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawing_area, 200, 200);
gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);
gtk_widget_show (drawing_area);
/* Signals used to handle backing pixmap */
g_signal_connect (drawing_area, "expose_event",
G_CALLBACK (expose_event), NULL);
g_signal_connect (drawing_area, "configure_event",
G_CALLBACK (configure_event), NULL);
/* Event signals */
g_signal_connect (drawing_area, "motion_notify_event",
G_CALLBACK (motion_notify_event), NULL);
g_signal_connect (drawing_area, "button_press_event",
G_CALLBACK (button_press_event), NULL);
g_signal_connect (drawing_area, "key_press_event",
G_CALLBACK (key_press_event), NULL);
g_signal_connect (drawing_area, "leave_notify_event",
G_CALLBACK (leave_notify_event), NULL);
g_signal_connect (drawing_area, "proximity_out_event",
G_CALLBACK (proximity_out_event), NULL);
gtk_widget_set_events (drawing_area, GDK_EXPOSURE_MASK
| GDK_LEAVE_NOTIFY_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_KEY_PRESS_MASK
| GDK_POINTER_MOTION_MASK
| GDK_POINTER_MOTION_HINT_MASK
| GDK_PROXIMITY_OUT_MASK);
/* The following call enables tracking and processing of extension
events for the drawing area */
gtk_widget_set_extension_events (drawing_area, GDK_EXTENSION_EVENTS_ALL);
gtk_widget_set_can_focus (drawing_area, TRUE);
gtk_widget_grab_focus (drawing_area);
/* .. And create some buttons */
button = gtk_button_new_with_label ("Input Dialog");
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
g_signal_connect (button, "clicked",
G_CALLBACK (create_input_dialog), NULL);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Quit");
gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (gtk_widget_destroy),
window);
gtk_widget_show (button);
gtk_widget_show (window);
gtk_main ();
return 0;
}