gtk2/gtk/gtkvscale.c

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1997-11-24 22:37:52 +00:00
/* 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 <stdio.h>
#include "gtkvscale.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)
static void gtk_vscale_class_init (GtkVScaleClass *klass);
static void gtk_vscale_init (GtkVScale *vscale);
static void gtk_vscale_realize (GtkWidget *widget);
static void gtk_vscale_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_vscale_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_vscale_pos_trough (GtkVScale *vscale,
gint *x,
gint *y,
gint *w,
gint *h);
static void gtk_vscale_draw_slider (GtkRange *range);
static void gtk_vscale_draw_value (GtkScale *scale);
static gint gtk_vscale_trough_keys (GtkRange *range,
GdkEventKey *key,
GtkScrollType *scroll,
GtkTroughType *pos);
guint
gtk_vscale_get_type ()
{
static guint vscale_type = 0;
if (!vscale_type)
{
GtkTypeInfo vscale_info =
{
"GtkVScale",
sizeof (GtkVScale),
sizeof (GtkVScaleClass),
(GtkClassInitFunc) gtk_vscale_class_init,
(GtkObjectInitFunc) gtk_vscale_init,
(GtkArgSetFunc) NULL,
(GtkArgGetFunc) NULL,
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};
vscale_type = gtk_type_unique (gtk_scale_get_type (), &vscale_info);
}
return vscale_type;
}
static void
gtk_vscale_class_init (GtkVScaleClass *class)
{
GtkWidgetClass *widget_class;
GtkRangeClass *range_class;
GtkScaleClass *scale_class;
widget_class = (GtkWidgetClass*) class;
range_class = (GtkRangeClass*) class;
scale_class = (GtkScaleClass*) class;
widget_class->realize = gtk_vscale_realize;
widget_class->size_request = gtk_vscale_size_request;
widget_class->size_allocate = gtk_vscale_size_allocate;
range_class->slider_update = gtk_range_default_vslider_update;
range_class->trough_click = gtk_range_default_vtrough_click;
range_class->motion = gtk_range_default_vmotion;
range_class->draw_slider = gtk_vscale_draw_slider;
range_class->trough_keys = gtk_vscale_trough_keys;
scale_class->draw_value = gtk_vscale_draw_value;
}
static void
gtk_vscale_init (GtkVScale *vscale)
{
}
GtkWidget*
gtk_vscale_new (GtkAdjustment *adjustment)
{
GtkVScale *vscale;
vscale = gtk_type_new (gtk_vscale_get_type ());
if (!adjustment)
adjustment = (GtkAdjustment*) gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
gtk_range_set_adjustment (GTK_RANGE (vscale), adjustment);
return GTK_WIDGET (vscale);
}
static void
gtk_vscale_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_VSCALE (widget));
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
range = GTK_RANGE (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;
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 (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
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gtk_vscale_pos_trough (GTK_VSCALE (widget), &x, &y, &w, &h);
attributes.x = x;
attributes.y = y;
attributes.width = w;
attributes.height = h;
attributes.event_mask |= (GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK);
range->trough = gdk_window_new (widget->window, &attributes, attributes_mask);
attributes.width = RANGE_CLASS (range)->slider_width;
attributes.height = SCALE_CLASS (range)->slider_length;
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 (widget->window, widget);
gdk_window_set_user_data (range->trough, widget);
gdk_window_set_user_data (range->slider, widget);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
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);
gdk_window_show (range->trough);
}
static void
gtk_vscale_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkScale *scale;
gint value_width;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_VSCALE (widget));
g_return_if_fail (requisition != NULL);
scale = GTK_SCALE (widget);
requisition->width = (RANGE_CLASS (scale)->slider_width +
widget->style->klass->ythickness * 2);
requisition->height = (SCALE_CLASS (scale)->slider_length +
widget->style->klass->xthickness) * 2;
if (scale->draw_value)
{
value_width = gtk_scale_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_vscale_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_VSCALE (widget));
g_return_if_fail (allocation != NULL);
widget->allocation = *allocation;
if (GTK_WIDGET_REALIZED (widget))
{
range = GTK_RANGE (widget);
scale = GTK_SCALE (widget);
gdk_window_move_resize (widget->window,
allocation->x, allocation->y,
allocation->width, allocation->height);
gtk_vscale_pos_trough (GTK_VSCALE (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_vscale_pos_trough (GtkVScale *vscale,
gint *x,
gint *y,
gint *w,
gint *h)
{
GtkWidget *widget;
GtkScale *scale;
g_return_if_fail (vscale != NULL);
g_return_if_fail (GTK_IS_VSCALE (vscale));
g_return_if_fail ((x != NULL) && (y != NULL) && (w != NULL) && (h != NULL));
widget = GTK_WIDGET (vscale);
scale = GTK_SCALE (vscale);
*w = (RANGE_CLASS (scale)->slider_width +
widget->style->klass->xthickness * 2);
*h = widget->allocation.height;
if (scale->draw_value)
{
*x = 0;
*y = 0;
switch (scale->value_pos)
{
case GTK_POS_LEFT:
*x = (gtk_scale_value_width (scale) +
(widget->allocation.width - widget->requisition.width) / 2);
break;
case GTK_POS_RIGHT:
*x = (widget->allocation.width - widget->requisition.width) / 2;
break;
case GTK_POS_TOP:
*x = (widget->allocation.width - *w) / 2;
*y = widget->style->font->ascent + widget->style->font->descent;
*h -= *y;
break;
case GTK_POS_BOTTOM:
*x = (widget->allocation.width - *w) / 2;
*h -= widget->style->font->ascent + widget->style->font->descent;
break;
}
}
else
{
*x = (widget->allocation.width - *w) / 2;
*y = 0;
}
*y += 1;
*h -= 2;
}
static void
gtk_vscale_draw_slider (GtkRange *range)
{
GtkStateType state_type;
gint width, height;
g_return_if_fail (range != NULL);
g_return_if_fail (GTK_IS_VSCALE (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_style_set_background (GTK_WIDGET (range)->style, range->slider, state_type);
gdk_window_clear (range->slider);
gdk_window_get_size (range->slider, &width, &height);
gtk_draw_hline (GTK_WIDGET (range)->style, range->slider,
state_type, 1, width - 2, height / 2);
gtk_draw_shadow (GTK_WIDGET (range)->style, range->slider,
state_type, GTK_SHADOW_OUT,
0, 0, -1, -1);
}
}
static void
gtk_vscale_draw_value (GtkScale *scale)
{
GtkStateType state_type;
gchar buffer[16];
gint text_width;
gint width, height;
gint x, y;
g_return_if_fail (scale != NULL);
g_return_if_fail (GTK_IS_VSCALE (scale));
if (scale->draw_value)
{
gdk_window_get_size (GTK_WIDGET (scale)->window, &width, &height);
gdk_window_clear_area (GTK_WIDGET (scale)->window, 1, 1, width - 3, height - 3);
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, NULL);
gdk_window_get_position (GTK_RANGE (scale)->slider, NULL, &y);
gdk_window_get_size (GTK_RANGE (scale)->trough, &width, NULL);
gdk_window_get_size (GTK_RANGE (scale)->slider, NULL, &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, NULL);
gdk_window_get_position (GTK_RANGE (scale)->slider, NULL, &y);
gdk_window_get_size (GTK_RANGE (scale)->trough, &width, NULL);
gdk_window_get_size (GTK_RANGE (scale)->slider, NULL, &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)->trough, &x, &y);
gdk_window_get_size (GTK_RANGE (scale)->slider, &width, NULL);
gdk_window_get_size (GTK_RANGE (scale)->trough, NULL, &height);
x += (width - text_width) / 2;
y -= GTK_WIDGET (scale)->style->font->descent;
break;
case GTK_POS_BOTTOM:
gdk_window_get_position (GTK_RANGE (scale)->trough, &x, &y);
gdk_window_get_size (GTK_RANGE (scale)->slider, &width, NULL);
gdk_window_get_size (GTK_RANGE (scale)->trough, NULL, &height);
x += (width - text_width) / 2;
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_draw_string (GTK_WIDGET (scale)->style,
GTK_WIDGET (scale)->window,
state_type, x, y, buffer);
}
}
static gint
gtk_vscale_trough_keys(GtkRange *range,
GdkEventKey *key,
GtkScrollType *scroll,
GtkTroughType *pos)
{
gint return_val = FALSE;
switch (key->keyval)
{
case GDK_Up:
return_val = TRUE;
*scroll = GTK_SCROLL_STEP_BACKWARD;
break;
case GDK_Down:
return_val = TRUE;
*scroll = GTK_SCROLL_STEP_FORWARD;
break;
case GDK_Page_Up:
return_val = TRUE;
*scroll = GTK_SCROLL_PAGE_BACKWARD;
break;
case GDK_Page_Down:
return_val = TRUE;
*scroll = GTK_SCROLL_PAGE_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;
}