gtk2/gtk/gtkhscale.c
2000-03-14 19:57:25 +00:00

619 lines
18 KiB
C

/* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. 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/.
*/
#include <stdio.h>
#include "gtkhscale.h"
#include "gtksignal.h"
#include "gdk/gdkkeysyms.h"
#define SCALE_CLASS(w) GTK_SCALE_CLASS (GTK_OBJECT (w)->klass)
#define RANGE_CLASS(w) GTK_RANGE_CLASS (GTK_OBJECT (w)->klass)
enum {
ARG_0,
ARG_ADJUSTMENT
};
static void gtk_hscale_class_init (GtkHScaleClass *klass);
static void gtk_hscale_init (GtkHScale *hscale);
static void gtk_hscale_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_hscale_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_hscale_realize (GtkWidget *widget);
static void gtk_hscale_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_hscale_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_hscale_pos_trough (GtkHScale *hscale,
gint *x,
gint *y,
gint *w,
gint *h);
static void gtk_hscale_pos_background (GtkHScale *hscale,
gint *x,
gint *y,
gint *w,
gint *h);
static void gtk_hscale_draw_slider (GtkRange *range);
static void gtk_hscale_draw_value (GtkScale *scale);
static void gtk_hscale_draw (GtkWidget *widget,
GdkRectangle *area);
static gint gtk_hscale_trough_keys (GtkRange *range,
GdkEventKey *key,
GtkScrollType *scroll,
GtkTroughType *pos);
static void gtk_hscale_clear_background (GtkRange *range);
GtkType
gtk_hscale_get_type (void)
{
static GtkType hscale_type = 0;
if (!hscale_type)
{
static const GtkTypeInfo hscale_info =
{
"GtkHScale",
sizeof (GtkHScale),
sizeof (GtkHScaleClass),
(GtkClassInitFunc) gtk_hscale_class_init,
(GtkObjectInitFunc) gtk_hscale_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
hscale_type = gtk_type_unique (GTK_TYPE_SCALE, &hscale_info);
}
return hscale_type;
}
static void
gtk_hscale_class_init (GtkHScaleClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkRangeClass *range_class;
GtkScaleClass *scale_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
range_class = (GtkRangeClass*) class;
scale_class = (GtkScaleClass*) class;
gtk_object_add_arg_type ("GtkHScale::adjustment",
GTK_TYPE_ADJUSTMENT,
GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
ARG_ADJUSTMENT);
object_class->set_arg = gtk_hscale_set_arg;
object_class->get_arg = gtk_hscale_get_arg;
widget_class->realize = gtk_hscale_realize;
widget_class->size_request = gtk_hscale_size_request;
widget_class->size_allocate = gtk_hscale_size_allocate;
widget_class->draw = gtk_hscale_draw;
range_class->slider_update = gtk_range_default_hslider_update;
range_class->trough_click = gtk_range_default_htrough_click;
range_class->motion = gtk_range_default_hmotion;
range_class->draw_slider = gtk_hscale_draw_slider;
range_class->trough_keys = gtk_hscale_trough_keys;
range_class->clear_background = gtk_hscale_clear_background;
scale_class->draw_value = gtk_hscale_draw_value;
}
static void
gtk_hscale_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GtkHScale *hscale;
hscale = GTK_HSCALE (object);
switch (arg_id)
{
case ARG_ADJUSTMENT:
gtk_range_set_adjustment (GTK_RANGE (hscale), GTK_VALUE_POINTER (*arg));
break;
default:
break;
}
}
static void
gtk_hscale_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GtkHScale *hscale;
hscale = GTK_HSCALE (object);
switch (arg_id)
{
case ARG_ADJUSTMENT:
GTK_VALUE_POINTER (*arg) = GTK_RANGE (hscale);
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static void
gtk_hscale_init (GtkHScale *hscale)
{
GTK_WIDGET_SET_FLAGS (hscale, GTK_NO_WINDOW);
}
GtkWidget*
gtk_hscale_new (GtkAdjustment *adjustment)
{
GtkWidget *hscale;
hscale = gtk_widget_new (GTK_TYPE_HSCALE,
"adjustment", adjustment,
NULL);
return hscale;
}
static void
gtk_hscale_realize (GtkWidget *widget)
{
GtkRange *range;
GdkWindowAttr attributes;
gint attributes_mask;
gint x, y, w, h;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_HSCALE (widget));
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
range = GTK_RANGE (widget);
widget->window = gtk_widget_get_parent_window (widget);
gdk_window_ref (widget->window);
gtk_hscale_pos_trough (GTK_HSCALE (widget), &x, &y, &w, &h);
attributes.x = x;
attributes.y = y;
attributes.width = w;
attributes.height = h;
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_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_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;
range->trough = gdk_window_new (widget->window, &attributes, attributes_mask);
attributes.width = SCALE_CLASS (range)->slider_length;
attributes.height = RANGE_CLASS (range)->slider_width;
attributes.event_mask |= (GDK_BUTTON_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK);
range->slider = gdk_window_new (range->trough, &attributes, attributes_mask);
widget->style = gtk_style_attach (widget->style, widget->window);
gdk_window_set_user_data (range->trough, widget);
gdk_window_set_user_data (range->slider, widget);
gtk_style_set_background (widget->style, range->trough, GTK_STATE_ACTIVE);
gtk_style_set_background (widget->style, range->slider, GTK_STATE_NORMAL);
gtk_range_slider_update (GTK_RANGE (widget));
gdk_window_show (range->slider);
}
static void
gtk_hscale_draw (GtkWidget *widget,
GdkRectangle *area)
{
GtkRange *range;
GdkRectangle tmp_area;
GdkRectangle child_area;
gint x, y, width, height;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_RANGE (widget));
g_return_if_fail (area != NULL);
if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
{
range = GTK_RANGE (widget);
gtk_hscale_pos_background (GTK_HSCALE (widget), &x, &y, &width, &height);
tmp_area.x = x;
tmp_area.y = y;
tmp_area.width = width;
tmp_area.height = height;
if (gdk_rectangle_intersect (area, &tmp_area, &child_area))
gtk_range_draw_background (range);
gtk_hscale_pos_trough (GTK_HSCALE (widget), &x, &y, &width, &height);
tmp_area.x = x;
tmp_area.y = y;
tmp_area.width = width;
tmp_area.height = height;
if (gdk_rectangle_intersect (area, &tmp_area, &child_area))
{
gtk_range_draw_trough (range);
gtk_range_draw_slider (range);
gtk_range_draw_step_forw (range);
gtk_range_draw_step_back (range);
}
}
}
static void
gtk_hscale_clear_background (GtkRange *range)
{
GtkWidget *widget;
gint x, y, width, height;
g_return_if_fail (range != NULL);
widget = GTK_WIDGET (range);
gtk_hscale_pos_background (GTK_HSCALE (range), &x, &y, &width, &height);
gtk_widget_queue_clear_area (GTK_WIDGET (range),
x, y, width, height);
}
static void
gtk_hscale_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkScale *scale;
gint value_width;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_HSCALE (widget));
g_return_if_fail (requisition != NULL);
scale = GTK_SCALE (widget);
requisition->width = (SCALE_CLASS (scale)->slider_length +
widget->style->klass->xthickness) * 2;
requisition->height = (RANGE_CLASS (scale)->slider_width +
widget->style->klass->ythickness * 2);
if (scale->draw_value)
{
value_width = gtk_scale_get_value_width (scale);
if ((scale->value_pos == GTK_POS_LEFT) ||
(scale->value_pos == GTK_POS_RIGHT))
{
requisition->width += value_width + SCALE_CLASS (scale)->value_spacing;
if (requisition->height < (widget->style->font->ascent + widget->style->font->descent))
requisition->height = widget->style->font->ascent + widget->style->font->descent;
}
else if ((scale->value_pos == GTK_POS_TOP) ||
(scale->value_pos == GTK_POS_BOTTOM))
{
if (requisition->width < value_width)
requisition->width = value_width;
requisition->height += widget->style->font->ascent + widget->style->font->descent;
}
}
}
static void
gtk_hscale_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkRange *range;
GtkScale *scale;
gint width, height;
gint x, y;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_HSCALE (widget));
g_return_if_fail (allocation != NULL);
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
{
range = GTK_RANGE (widget);
scale = GTK_SCALE (widget);
gtk_hscale_pos_trough (GTK_HSCALE (widget), &x, &y, &width, &height);
gdk_window_move_resize (range->trough,
x, y, width, height);
gtk_range_slider_update (GTK_RANGE (widget));
}
}
static void
gtk_hscale_pos_trough (GtkHScale *hscale,
gint *x,
gint *y,
gint *w,
gint *h)
{
GtkWidget *widget;
GtkScale *scale;
g_return_if_fail (hscale != NULL);
g_return_if_fail (GTK_IS_HSCALE (hscale));
g_return_if_fail ((x != NULL) && (y != NULL) && (w != NULL) && (h != NULL));
widget = GTK_WIDGET (hscale);
scale = GTK_SCALE (hscale);
*w = widget->allocation.width;
*h = (RANGE_CLASS (scale)->slider_width +
widget->style->klass->ythickness * 2);
if (scale->draw_value)
{
*x = 0;
*y = 0;
switch (scale->value_pos)
{
case GTK_POS_LEFT:
*x += gtk_scale_get_value_width (scale) + SCALE_CLASS (scale)->value_spacing;
*y = (widget->allocation.height - *h) / 2;
*w -= *x;
break;
case GTK_POS_RIGHT:
*w -= gtk_scale_get_value_width (scale) + SCALE_CLASS (scale)->value_spacing;
*y = (widget->allocation.height - *h) / 2;
break;
case GTK_POS_TOP:
*y = (widget->style->font->ascent + widget->style->font->descent +
(widget->allocation.height - widget->requisition.height) / 2);
break;
case GTK_POS_BOTTOM:
*y = (widget->allocation.height - widget->requisition.height) / 2;
break;
}
}
else
{
*x = 0;
*y = (widget->allocation.height - *h) / 2;
}
*x += 1;
*w -= 2;
*x += widget->allocation.x;
*y += widget->allocation.y;
}
static void
gtk_hscale_pos_background (GtkHScale *hscale,
gint *x,
gint *y,
gint *w,
gint *h)
{
GtkWidget *widget;
GtkScale *scale;
gint tx, ty, twidth, theight;
g_return_if_fail (hscale != NULL);
g_return_if_fail (GTK_IS_HSCALE (hscale));
g_return_if_fail ((x != NULL) && (y != NULL) && (w != NULL) && (h != NULL));
gtk_hscale_pos_trough (hscale, &tx, &ty, &twidth, &theight);
widget = GTK_WIDGET (hscale);
scale = GTK_SCALE (hscale);
*x = widget->allocation.x;
*y = widget->allocation.y;
*w = widget->allocation.width;
*h = widget->allocation.height;
switch (scale->value_pos)
{
case GTK_POS_LEFT:
*w -= twidth;
break;
case GTK_POS_RIGHT:
*x += twidth;
*w -= twidth;
break;
case GTK_POS_TOP:
*h -= theight;
break;
case GTK_POS_BOTTOM:
*y += theight;
*h -= theight;
break;
}
*w = MAX (*w, 0);
*h = MAX (*h, 0);
}
static void
gtk_hscale_draw_slider (GtkRange *range)
{
GtkStateType state_type;
g_return_if_fail (range != NULL);
g_return_if_fail (GTK_IS_HSCALE (range));
if (range->slider)
{
if ((range->in_child == RANGE_CLASS (range)->slider) ||
(range->click_child == RANGE_CLASS (range)->slider))
state_type = GTK_STATE_PRELIGHT;
else
state_type = GTK_STATE_NORMAL;
gtk_paint_slider (GTK_WIDGET (range)->style, range->slider, state_type,
GTK_SHADOW_OUT,
NULL, GTK_WIDGET (range), "hscale",
0, 0, -1, -1,
GTK_ORIENTATION_HORIZONTAL);
}
}
static void
gtk_hscale_draw_value (GtkScale *scale)
{
GtkStateType state_type;
GtkWidget *widget;
gchar buffer[32];
gint text_width;
gint width, height;
gint x, y;
g_return_if_fail (scale != NULL);
g_return_if_fail (GTK_IS_HSCALE (scale));
widget = GTK_WIDGET (scale);
if (scale->draw_value)
{
sprintf (buffer, "%0.*f", GTK_RANGE (scale)->digits, GTK_RANGE (scale)->adjustment->value);
text_width = gdk_string_measure (GTK_WIDGET (scale)->style->font, buffer);
switch (scale->value_pos)
{
case GTK_POS_LEFT:
gdk_window_get_position (GTK_RANGE (scale)->trough, &x, &y);
gdk_window_get_size (GTK_RANGE (scale)->trough, &width, &height);
x -= SCALE_CLASS (scale)->value_spacing + text_width;
y += ((height -
(GTK_WIDGET (scale)->style->font->ascent +
GTK_WIDGET (scale)->style->font->descent)) / 2 +
GTK_WIDGET (scale)->style->font->ascent);
break;
case GTK_POS_RIGHT:
gdk_window_get_position (GTK_RANGE (scale)->trough, &x, &y);
gdk_window_get_size (GTK_RANGE (scale)->trough, &width, &height);
x += width + SCALE_CLASS (scale)->value_spacing;
y += ((height -
(GTK_WIDGET (scale)->style->font->ascent +
GTK_WIDGET (scale)->style->font->descent)) / 2 +
GTK_WIDGET (scale)->style->font->ascent);
break;
case GTK_POS_TOP:
gdk_window_get_position (GTK_RANGE (scale)->slider, &x, NULL);
gdk_window_get_position (GTK_RANGE (scale)->trough, NULL, &y);
gdk_window_get_size (GTK_RANGE (scale)->slider, &width, NULL);
gdk_window_get_size (GTK_RANGE (scale)->trough, NULL, &height);
x += widget->allocation.x + (width - text_width) / 2;
x = CLAMP (x, widget->allocation.x,
widget->allocation.x + widget->allocation.width - text_width);
y -= GTK_WIDGET (scale)->style->font->descent;
break;
case GTK_POS_BOTTOM:
gdk_window_get_position (GTK_RANGE (scale)->slider, &x, NULL);
gdk_window_get_position (GTK_RANGE (scale)->trough, NULL, &y);
gdk_window_get_size (GTK_RANGE (scale)->slider, &width, NULL);
gdk_window_get_size (GTK_RANGE (scale)->trough, NULL, &height);
x += widget->allocation.x + (width - text_width) / 2;
x = CLAMP (x, widget->allocation.x,
widget->allocation.x + widget->allocation.width - text_width);
y += height + GTK_WIDGET (scale)->style->font->ascent;
break;
}
state_type = GTK_STATE_NORMAL;
if (!GTK_WIDGET_IS_SENSITIVE (scale))
state_type = GTK_STATE_INSENSITIVE;
gtk_paint_string (GTK_WIDGET (scale)->style,
GTK_WIDGET (scale)->window,
state_type,
NULL, GTK_WIDGET (scale), "hscale",
x, y, buffer);
}
}
static gint
gtk_hscale_trough_keys (GtkRange *range,
GdkEventKey *key,
GtkScrollType *scroll,
GtkTroughType *pos)
{
gint return_val = FALSE;
switch (key->keyval)
{
case GDK_Left:
return_val = TRUE;
if (key->state & GDK_CONTROL_MASK)
*scroll = GTK_SCROLL_PAGE_BACKWARD;
else
*scroll = GTK_SCROLL_STEP_BACKWARD;
break;
case GDK_Right:
return_val = TRUE;
if (key->state & GDK_CONTROL_MASK)
*scroll = GTK_SCROLL_PAGE_FORWARD;
else
*scroll = GTK_SCROLL_STEP_FORWARD;
break;
case GDK_Home:
return_val = TRUE;
*pos = GTK_TROUGH_START;
break;
case GDK_End:
return_val = TRUE;
*pos = GTK_TROUGH_END;
break;
}
return return_val;
}