Commit 690e3496 authored by CST 1998 Shawn T. Amundson's avatar CST 1998 Shawn T. Amundson Committed by Shawn Amundson

added this directory with stuff from the tutorial, updated to compile and

Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson <amundson@gtk.org>

        * examples/: added this directory with stuff from
          the tutorial, updated to compile and work with recent
          changes
parent 923f3f69
Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson <amundson@gtk.org>
* examples/: added this directory with stuff from
the tutorial, updated to compile and work with recent
changes
Mon Mar 23 01:04:51 1998 Owen Taylor <owt1@cornell.edu>
* gtk/gtktext.[ch] testgtk.c: Added optional word wrap, controlled
......
Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson <amundson@gtk.org>
* examples/: added this directory with stuff from
the tutorial, updated to compile and work with recent
changes
Mon Mar 23 01:04:51 1998 Owen Taylor <owt1@cornell.edu>
* gtk/gtktext.[ch] testgtk.c: Added optional word wrap, controlled
......
Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson <amundson@gtk.org>
* examples/: added this directory with stuff from
the tutorial, updated to compile and work with recent
changes
Mon Mar 23 01:04:51 1998 Owen Taylor <owt1@cornell.edu>
* gtk/gtktext.[ch] testgtk.c: Added optional word wrap, controlled
......
Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson <amundson@gtk.org>
* examples/: added this directory with stuff from
the tutorial, updated to compile and work with recent
changes
Mon Mar 23 01:04:51 1998 Owen Taylor <owt1@cornell.edu>
* gtk/gtktext.[ch] testgtk.c: Added optional word wrap, controlled
......
Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson <amundson@gtk.org>
* examples/: added this directory with stuff from
the tutorial, updated to compile and work with recent
changes
Mon Mar 23 01:04:51 1998 Owen Taylor <owt1@cornell.edu>
* gtk/gtktext.[ch] testgtk.c: Added optional word wrap, controlled
......
Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson <amundson@gtk.org>
* examples/: added this directory with stuff from
the tutorial, updated to compile and work with recent
changes
Mon Mar 23 01:04:51 1998 Owen Taylor <owt1@cornell.edu>
* gtk/gtktext.[ch] testgtk.c: Added optional word wrap, controlled
......
Mon Mar 23 12:03:03 CST 1998 Shawn T. Amundson <amundson@gtk.org>
* examples/: added this directory with stuff from
the tutorial, updated to compile and work with recent
changes
Mon Mar 23 01:04:51 1998 Owen Taylor <owt1@cornell.edu>
* gtk/gtktext.[ch] testgtk.c: Added optional word wrap, controlled
......
CC = gcc
dial_test: gtkdial.o dial_test.o
$(CC) `gtk-config --libs` dial_test.o gtkdial.o -o dial_test
dial_test.o:
$(CC) `gtk-config --cflags` -c dial_test.c -o dial_test.o
gtkdial.o: gtkdial.c gtkdial.h
$(CC) `gtk-config --cflags` -c gtkdial.c -o gtkdial.o
clean:
rm *.o dial_test
#include <gtk/gtk.h>
#include "gtkdial.h"
void
value_changed (GtkAdjustment *adjustment, GtkWidget *label)
{
char buffer[16];
sprintf(buffer,"%4.2f",adjustment->value);
gtk_label_set (GTK_LABEL (label), buffer);
}
int
main (int argc, char *argv[])
{
GtkWidget *window;
GtkAdjustment *adjustment;
GtkWidget *dial;
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *label;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW (window), "Dial");
gtk_signal_connect (GTK_OBJECT (window), "destroy",
GTK_SIGNAL_FUNC (gtk_exit), NULL);
gtk_container_border_width (GTK_CONTAINER (window), 10);
vbox = gtk_vbox_new (FALSE, 5);
gtk_container_add (GTK_CONTAINER (window), vbox);
gtk_widget_show(vbox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME(frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX(vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
adjustment = GTK_ADJUSTMENT(gtk_adjustment_new (0, -1.0, 1.0, 0.01, 0.1, 0));
dial = gtk_dial_new(adjustment);
gtk_dial_set_update_policy (GTK_DIAL(dial), GTK_UPDATE_DELAYED);
/* gtk_widget_set_usize (dial, 100, 100); */
gtk_container_add (GTK_CONTAINER (frame), dial);
gtk_widget_show (dial);
label = gtk_label_new("0.00");
gtk_box_pack_start (GTK_BOX(vbox), label, TRUE, TRUE, 0);
gtk_widget_show (label);
gtk_signal_connect (GTK_OBJECT(adjustment), "value_changed",
GTK_SIGNAL_FUNC (value_changed), label);
gtk_widget_show (window);
gtk_main ();
return 0;
}
/* 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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <math.h>
#include <stdio.h>
#include <gtk/gtkmain.h>
#include <gtk/gtksignal.h>
#include "gtkdial.h"
#define SCROLL_DELAY_LENGTH 300
#define DIAL_DEFAULT_SIZE 100
/* Forward declararations */
static void gtk_dial_class_init (GtkDialClass *klass);
static void gtk_dial_init (GtkDial *dial);
static void gtk_dial_destroy (GtkObject *object);
static void gtk_dial_realize (GtkWidget *widget);
static void gtk_dial_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_dial_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gint gtk_dial_expose (GtkWidget *widget,
GdkEventExpose *event);
static gint gtk_dial_button_press (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_dial_button_release (GtkWidget *widget,
GdkEventButton *event);
static gint gtk_dial_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gint gtk_dial_timer (GtkDial *dial);
static void gtk_dial_update_mouse (GtkDial *dial, gint x, gint y);
static void gtk_dial_update (GtkDial *dial);
static void gtk_dial_adjustment_changed (GtkAdjustment *adjustment,
gpointer data);
static void gtk_dial_adjustment_value_changed (GtkAdjustment *adjustment,
gpointer data);
/* Local data */
static GtkWidgetClass *parent_class = NULL;
guint
gtk_dial_get_type ()
{
static guint dial_type = 0;
if (!dial_type)
{
GtkTypeInfo dial_info =
{
"GtkDial",
sizeof (GtkDial),
sizeof (GtkDialClass),
(GtkClassInitFunc) gtk_dial_class_init,
(GtkObjectInitFunc) gtk_dial_init,
(GtkArgSetFunc) NULL,
(GtkArgGetFunc) NULL,
};
dial_type = gtk_type_unique (gtk_widget_get_type (), &dial_info);
}
return dial_type;
}
static void
gtk_dial_class_init (GtkDialClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
parent_class = gtk_type_class (gtk_widget_get_type ());
object_class->destroy = gtk_dial_destroy;
widget_class->realize = gtk_dial_realize;
widget_class->expose_event = gtk_dial_expose;
widget_class->size_request = gtk_dial_size_request;
widget_class->size_allocate = gtk_dial_size_allocate;
widget_class->button_press_event = gtk_dial_button_press;
widget_class->button_release_event = gtk_dial_button_release;
widget_class->motion_notify_event = gtk_dial_motion_notify;
}
static void
gtk_dial_init (GtkDial *dial)
{
dial->button = 0;
dial->policy = GTK_UPDATE_CONTINUOUS;
dial->timer = 0;
dial->radius = 0;
dial->pointer_width = 0;
dial->angle = 0.0;
dial->old_value = 0.0;
dial->old_lower = 0.0;
dial->old_upper = 0.0;
dial->adjustment = NULL;
}
GtkWidget*
gtk_dial_new (GtkAdjustment *adjustment)
{
GtkDial *dial;
dial = gtk_type_new (gtk_dial_get_type ());
if (!adjustment)
adjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
gtk_dial_set_adjustment (dial, adjustment);
return GTK_WIDGET (dial);
}
static void
gtk_dial_destroy (GtkObject *object)
{
GtkDial *dial;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_DIAL (object));
dial = GTK_DIAL (object);
if (dial->adjustment)
gtk_object_unref (GTK_OBJECT (dial->adjustment));
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
GtkAdjustment*
gtk_dial_get_adjustment (GtkDial *dial)
{
g_return_val_if_fail (dial != NULL, NULL);
g_return_val_if_fail (GTK_IS_DIAL (dial), NULL);
return dial->adjustment;
}
void
gtk_dial_set_update_policy (GtkDial *dial,
GtkUpdateType policy)
{
g_return_if_fail (dial != NULL);
g_return_if_fail (GTK_IS_DIAL (dial));
dial->policy = policy;
}
void
gtk_dial_set_adjustment (GtkDial *dial,
GtkAdjustment *adjustment)
{
g_return_if_fail (dial != NULL);
g_return_if_fail (GTK_IS_DIAL (dial));
if (dial->adjustment)
{
gtk_signal_disconnect_by_data (GTK_OBJECT (dial->adjustment), (gpointer) dial);
gtk_object_unref (GTK_OBJECT (dial->adjustment));
}
dial->adjustment = adjustment;
gtk_object_ref (GTK_OBJECT (dial->adjustment));
gtk_signal_connect (GTK_OBJECT (adjustment), "changed",
(GtkSignalFunc) gtk_dial_adjustment_changed,
(gpointer) dial);
gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
(GtkSignalFunc) gtk_dial_adjustment_value_changed,
(gpointer) dial);
dial->old_value = adjustment->value;
dial->old_lower = adjustment->lower;
dial->old_upper = adjustment->upper;
gtk_dial_update (dial);
}
static void
gtk_dial_realize (GtkWidget *widget)
{
GtkDial *dial;
GdkWindowAttr attributes;
gint attributes_mask;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_DIAL (widget));
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
dial = GTK_DIAL (widget);
attributes.x = widget->allocation.x;
attributes.y = widget->allocation.y;
attributes.width = widget->allocation.width;
attributes.height = widget->allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (widget) |
GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
widget->style = gtk_style_attach (widget->style, widget->window);
gdk_window_set_user_data (widget->window, widget);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
}
static void
gtk_dial_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
requisition->width = DIAL_DEFAULT_SIZE;
requisition->height = DIAL_DEFAULT_SIZE;
}
static void
gtk_dial_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkDial *dial;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_DIAL (widget));
g_return_if_fail (allocation != NULL);
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
{
dial = GTK_DIAL (widget);
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
dial->radius = MAX(allocation->width,allocation->height) * 0.45;
dial->pointer_width = dial->radius / 5;
}
}
static gint
gtk_dial_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkDial *dial;
GdkPoint points[3];
gdouble s,c;
gdouble theta;
gint xc, yc;
gint tick_length;
gint i;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (event->count > 0)
return FALSE;
dial = GTK_DIAL (widget);
gdk_window_clear_area (widget->window,
0, 0,
widget->allocation.width,
widget->allocation.height);
xc = widget->allocation.width/2;
yc = widget->allocation.height/2;
/* Draw ticks */
for (i=0; i<25; i++)
{
theta = (i*M_PI/18. - M_PI/6.);
s = sin(theta);
c = cos(theta);
tick_length = (i%6 == 0) ? dial->pointer_width : dial->pointer_width/2;
gdk_draw_line (widget->window,
widget->style->fg_gc[widget->state],
xc + c*(dial->radius - tick_length),
yc - s*(dial->radius - tick_length),
xc + c*dial->radius,
yc - s*dial->radius);
}
/* Draw pointer */
s = sin(dial->angle);
c = cos(dial->angle);
points[0].x = xc + s*dial->pointer_width/2;
points[0].y = yc + c*dial->pointer_width/2;
points[1].x = xc + c*dial->radius;
points[1].y = yc - s*dial->radius;
points[2].x = xc - s*dial->pointer_width/2;
points[2].y = yc - c*dial->pointer_width/2;
gtk_draw_polygon (widget->style,
widget->window,
GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
points, 3,
TRUE);
return FALSE;
}
static gint
gtk_dial_button_press (GtkWidget *widget,
GdkEventButton *event)
{
GtkDial *dial;
gint dx, dy;
double s, c;
double d_parallel;
double d_perpendicular;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
dial = GTK_DIAL (widget);
/* Determine if button press was within pointer region - we
do this by computing the parallel and perpendicular distance of
the point where the mouse was pressed from the line passing through
the pointer */
dx = event->x - widget->allocation.width / 2;
dy = widget->allocation.height / 2 - event->y;
s = sin(dial->angle);
c = cos(dial->angle);
d_parallel = s*dy + c*dx;
d_perpendicular = fabs(s*dx - c*dy);
if (!dial->button &&
(d_perpendicular < dial->pointer_width/2) &&
(d_parallel > - dial->pointer_width))
{
gtk_grab_add (widget);
dial->button = event->button;
gtk_dial_update_mouse (dial, event->x, event->y);
}
return FALSE;
}
static gint
gtk_dial_button_release (GtkWidget *widget,
GdkEventButton *event)
{
GtkDial *dial;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
dial = GTK_DIAL (widget);
if (dial->button == event->button)
{
gtk_grab_remove (widget);
dial->button = 0;
if (dial->policy == GTK_UPDATE_DELAYED)
gtk_timeout_remove (dial->timer);
if ((dial->policy != GTK_UPDATE_CONTINUOUS) &&
(dial->old_value != dial->adjustment->value))
gtk_signal_emit_by_name (GTK_OBJECT (dial->adjustment), "value_changed");
}
return FALSE;
}
static gint
gtk_dial_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkDial *dial;
GdkModifierType mods;
gint x, y, mask;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
dial = GTK_DIAL (widget);
if (dial->button != 0)
{
x = event->x;
y = event->y;
if (event->is_hint || (event->window != widget->window))
gdk_window_get_pointer (widget->window, &x, &y, &mods);
switch (dial->button)
{
case 1:
mask = GDK_BUTTON1_MASK;
break;
case 2:
mask = GDK_BUTTON2_MASK;
break;
case 3:
mask = GDK_BUTTON3_MASK;
break;
default:
mask = 0;
break;
}
if (mods & mask)
gtk_dial_update_mouse (dial, x,y);
}
return FALSE;
}
static gint
gtk_dial_timer (GtkDial *dial)
{
g_return_val_if_fail (dial != NULL, FALSE);
g_return_val_if_fail (GTK_IS_DIAL (dial), FALSE);
if (dial->policy == GTK_UPDATE_DELAYED)
gtk_signal_emit_by_name (GTK_OBJECT (dial->adjustment), "value_changed");
return FALSE;
}
static void
gtk_dial_update_mouse (GtkDial *dial, gint x, gint y)
{
gint xc, yc;
gfloat old_value;
g_return_if_fail (dial != NULL);
g_return_if_fail (GTK_IS_DIAL (dial));
xc = GTK_WIDGET(dial)->allocation.width / 2;
yc = GTK_WIDGET(dial)->allocation.height / 2;
old_value = dial->adjustment->value;
dial->angle = atan2(yc-y, x-xc);
if (dial->angle < -M_PI/2.)
dial->angle += 2*M_PI;
if (dial->angle < -M_PI/6)
dial->angle = -M_PI/6;
if (dial->angle > 7.*M_PI/6.)
dial->angle = 7.*M_PI/6.;
dial->adjustment->value = dial->adjustment->lower + (7.*M_PI/6 - dial->angle) *
(dial->adjustment->upper - dial->adjustment->lower) / (4.*M_PI/3.);
if (dial->adjustment->value != old_value)
{
if (dial->policy == GTK_UPDATE_CONTINUOUS)
{
gtk_signal_emit_by_name (GTK_OBJECT (dial->adjustment), "value_changed");
}
else
{
gtk_widget_draw (GTK_WIDGET(dial), NULL);
if (dial->policy == GTK_UPDATE_DELAYED)
{
if (dial->timer)
gtk_timeout_remove (dial->timer);
dial->timer = gtk_timeout_add (SCROLL_DELAY_LENGTH,
(GtkFunction) gtk_dial_timer,
(gpointer) dial);
}
}
}
}
static void
gtk_dial_update (GtkDial *dial)
{
gfloat new_value;
g_return_if_fail (dial != NULL);
g_return_if_fail (GTK_IS_DIAL (dial));
new_value = dial->adjustment->value;
if (new_value < dial->adjustment->lower)
new_value = dial->adjustment->lower;
</