/* GTK - The GIMP Toolkit
- * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ * Copyright (C) 2001 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * 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
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * 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/.
+ */
+
+#include <math.h>
#include <stdio.h>
+#include <stdlib.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)
+#include "gtkintl.h"
+static gpointer parent_class;
-static void gtk_hscale_class_init (GtkHScaleClass *klass);
-static void gtk_hscale_init (GtkHScale *hscale);
-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);
+static void gtk_hscale_class_init (GtkHScaleClass *klass);
+static void gtk_hscale_init (GtkHScale *hscale);
+static gboolean gtk_hscale_expose (GtkWidget *widget,
+ GdkEventExpose *event);
-guint
+GtkType
gtk_hscale_get_type (void)
{
- static guint hscale_type = 0;
-
+ static GtkType hscale_type = 0;
+
if (!hscale_type)
{
- GtkTypeInfo hscale_info =
+ static const GtkTypeInfo hscale_info =
{
- "GtkHScale",
- sizeof (GtkHScale),
- sizeof (GtkHScaleClass),
- (GtkClassInitFunc) gtk_hscale_class_init,
- (GtkObjectInitFunc) gtk_hscale_init,
- /* reserved_1 */ NULL,
+ "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_scale_get_type (), &hscale_info);
+
+ hscale_type = gtk_type_unique (GTK_TYPE_SCALE, &hscale_info);
}
-
+
return hscale_type;
}
static void
gtk_hscale_class_init (GtkHScaleClass *class)
{
+ GObjectClass *gobject_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_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_init (GtkHScale *hscale)
-{
- GTK_WIDGET_SET_FLAGS (hscale, GTK_NO_WINDOW);
-}
-
-GtkWidget*
-gtk_hscale_new (GtkAdjustment *adjustment)
-{
- GtkHScale *hscale;
-
- hscale = gtk_type_new (gtk_hscale_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 (hscale), adjustment);
-
- return GTK_WIDGET (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 + widget->allocation.x;
- attributes.y = y + widget->allocation.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);
+ gobject_class = G_OBJECT_CLASS (class);
+ widget_class = GTK_WIDGET_CLASS (class);
+ range_class = GTK_RANGE_CLASS (class);
- widget->style = gtk_style_attach (widget->style, widget->window);
+ parent_class = g_type_class_peek_parent (class);
- 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);
+ range_class->slider_detail = "hscale";
+
+ widget_class->expose_event = gtk_hscale_expose;
}
static void
-gtk_hscale_draw (GtkWidget *widget,
- GdkRectangle *area)
+gtk_hscale_init (GtkHScale *hscale)
{
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);
+ range = GTK_RANGE (hscale);
- 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);
- }
- }
+ range->orientation = GTK_ORIENTATION_HORIZONTAL;
+ range->flippable = TRUE;
}
-static void
-gtk_hscale_clear_background (GtkRange *range)
+GtkWidget*
+gtk_hscale_new (GtkAdjustment *adjustment)
{
- GtkWidget *widget;
- gint x, y, width, height;
-
- g_return_if_fail (range != NULL);
-
- widget = GTK_WIDGET (range);
+ GtkWidget *hscale;
- gtk_hscale_pos_background (GTK_HSCALE (range), &x, &y, &width, &height);
+ hscale = gtk_widget_new (GTK_TYPE_HSCALE,
+ "adjustment", adjustment,
+ NULL);
- gtk_widget_queue_clear_area (GTK_WIDGET (range),
- x, y, width, height);
+ return hscale;
}
-static void
-gtk_hscale_size_request (GtkWidget *widget,
- GtkRequisition *requisition)
+/**
+ * gtk_hscale_new_with_range:
+ * @min: minimum value
+ * @max: maximum value
+ * @step: step increment (tick size) used with keyboard shortcuts
+ *
+ * Creates a new horizontal scale widget that lets the user input a
+ * number between @min and @max (including @min and @max) with the
+ * increment @step. @step must be nonzero; it's the distance the
+ * slider moves when using the arrow keys to adjust the scale value.
+ *
+ * Return value: a new #GtkHScale
+ **/
+GtkWidget*
+gtk_hscale_new_with_range (gdouble min,
+ gdouble max,
+ gdouble step)
{
+ GtkObject *adj;
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);
+ gint digits;
- if (scale->draw_value)
- {
- value_width = gtk_scale_value_width (scale);
+ g_return_val_if_fail (min < max, NULL);
+ g_return_val_if_fail (step != 0.0, NULL);
- 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;
- }
- }
+ adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
+
+ scale = g_object_new (GTK_TYPE_HSCALE,
+ "adjustment", adj,
+ NULL);
+
+ if (fabs (step) >= 1.0 || step == 0.0)
+ digits = 0;
+ else {
+ digits = abs ((gint) floor (log10 (fabs (step))));
+ if (digits > 5)
+ digits = 5;
+ }
+
+ gtk_scale_set_digits (scale, digits);
+
+ return GTK_WIDGET (scale);
}
-static void
-gtk_hscale_size_allocate (GtkWidget *widget,
- GtkAllocation *allocation)
+static gboolean
+gtk_hscale_expose (GtkWidget *widget,
+ GdkEventExpose *event)
{
GtkRange *range;
+ GtkHScale *hscale;
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 + widget->allocation.x,
- y + widget->allocation.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_value_width (scale) + SCALE_CLASS (scale)->value_spacing;
- *y = (widget->allocation.height - *h) / 2;
- *w -= *x;
- break;
- case GTK_POS_RIGHT:
- *w -= gtk_scale_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;
-}
-
-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 = tx;
- *w -= twidth;
- break;
- case GTK_POS_TOP:
- *h -= theight;
- break;
- case GTK_POS_BOTTOM:
- *y = ty;
- *h -= theight;
- break;
- }
-}
-
-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;
+ range = GTK_RANGE (widget);
+ scale = GTK_SCALE (widget);
+ hscale = GTK_HSCALE (widget);
- g_return_if_fail (scale != NULL);
- g_return_if_fail (GTK_IS_HSCALE (scale));
+ /* We need to chain up _first_ so the various geometry members of
+ * GtkRange struct are updated.
+ */
+ if (GTK_WIDGET_CLASS (parent_class)->expose_event)
+ GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
- 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);
-
+ PangoLayout *layout;
+ PangoRectangle logical_rect;
+ gchar *txt;
+ gint x, y;
+ GtkStateType state_type;
+ gint value_spacing;
+
+ gtk_widget_style_get (widget, "value_spacing", &value_spacing, NULL);
+
+ txt = _gtk_scale_format_value (scale,
+ GTK_RANGE (scale)->adjustment->value);
+
+ layout = gtk_widget_create_pango_layout (widget, txt);
+ g_free (txt);
+
+ pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
+
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;
- 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;
- y += height + GTK_WIDGET (scale)->style->font->ascent;
- break;
- }
-
+ {
+ case GTK_POS_LEFT:
+ x = range->range_rect.x - value_spacing - logical_rect.width;
+ y = range->range_rect.y + (range->range_rect.height - logical_rect.height) / 2;
+ break;
+
+ case GTK_POS_RIGHT:
+ x = range->range_rect.x + range->range_rect.width + value_spacing;
+ y = range->range_rect.y + (range->range_rect.height - logical_rect.height) / 2;
+ break;
+
+ case GTK_POS_TOP:
+ x = range->slider_start +
+ (range->slider_end - range->slider_start - logical_rect.width) / 2;
+ x = CLAMP (x, 0, widget->allocation.width - logical_rect.width);
+ y = range->range_rect.y - logical_rect.height - value_spacing;
+ break;
+
+ case GTK_POS_BOTTOM:
+ x = range->slider_start +
+ (range->slider_end - range->slider_start - logical_rect.width) / 2;
+ x = CLAMP (x, 0, widget->allocation.width - logical_rect.width);
+ y = range->range_rect.y + range->range_rect.height + value_spacing;
+ break;
+
+ default:
+ g_return_val_if_reached (FALSE);
+ x = 0;
+ y = 0;
+ break;
+ }
+
+ x += widget->allocation.x;
+ y += widget->allocation.y;
+
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;
+ state_type = GTK_STATE_INSENSITIVE;
+
+ gtk_paint_layout (widget->style,
+ widget->window,
+ state_type,
+ FALSE,
+ NULL,
+ widget,
+ "hscale",
+ x, y,
+ layout);
+
+ g_object_unref (G_OBJECT (layout));
}
- return return_val;
+
+ return FALSE;
}
projects / ~andy / gtk / blobdiff