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gtk2/gtk/gtkprogressbar.c
Philip Withnall 0b4d8433d4 Bug 654266 — No longer possible to set empty text on a GtkProgressBar 
Change the semantics of GtkProgressBar:text slightly so that it behaves as
it did before GTK+ 3.

Closes: bgo#654266
2011-07-23 00:09:30 +01:00

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/* 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/.
*/
#include "config.h"
#include <string.h>
#include "gtkprogressbar.h"
#include "gtkorientableprivate.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "a11y/gtkprogressbaraccessible.h"
/**
* SECTION:gtkprogressbar
* @Short_description: A widget which indicates progress visually
* @Title: GtkProgressBar
*
* The #GtkProgressBar is typically used to display the progress of a long
* running operation. It provides a visual clue that processing
* is underway. The #GtkProgressBar can be used in two different
* modes: percentage mode and activity mode.
*
* When an application can determine how much work needs to take place
* (e.g. read a fixed number of bytes from a file) and can monitor its
* progress, it can use the #GtkProgressBar in percentage mode and the user
* sees a growing bar indicating the percentage of the work that has
* been completed. In this mode, the application is required to call
* gtk_progress_bar_set_fraction() periodically to update the progress bar.
*
* When an application has no accurate way of knowing the amount of work
* to do, it can use the #GtkProgressBar in activity mode, which shows
* activity by a block moving back and forth within the progress area. In
* this mode, the application is required to call gtk_progress_bar_pulse()
* periodically to update the progress bar.
*
* There is quite a bit of flexibility provided to control the appearance
* of the #GtkProgressBar. Functions are provided to control the
* orientation of the bar, optional text can be displayed along with
* the bar, and the step size used in activity mode can be set.
*/
#define MIN_HORIZONTAL_BAR_WIDTH 150
#define MIN_HORIZONTAL_BAR_HEIGHT 20
#define MIN_VERTICAL_BAR_WIDTH 22
#define MIN_VERTICAL_BAR_HEIGHT 80
struct _GtkProgressBarPrivate
{
gchar *text;
gdouble fraction;
gdouble pulse_fraction;
gint activity_pos;
guint activity_blocks;
guint activity_step;
GtkOrientation orientation;
guint activity_dir : 1;
guint activity_mode : 1;
guint ellipsize : 3;
guint show_text : 1;
guint inverted : 1;
};
enum {
PROP_0,
PROP_FRACTION,
PROP_PULSE_STEP,
PROP_ORIENTATION,
PROP_INVERTED,
PROP_TEXT,
PROP_SHOW_TEXT,
PROP_ELLIPSIZE
};
static void gtk_progress_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_progress_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_progress_bar_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_progress_bar_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural);
static void gtk_progress_bar_real_update (GtkProgressBar *progress);
static gboolean gtk_progress_bar_draw (GtkWidget *widget,
cairo_t *cr);
static void gtk_progress_bar_act_mode_enter (GtkProgressBar *progress);
static void gtk_progress_bar_finalize (GObject *object);
static void gtk_progress_bar_set_orientation (GtkProgressBar *progress,
GtkOrientation orientation);
G_DEFINE_TYPE_WITH_CODE (GtkProgressBar, gtk_progress_bar, GTK_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL))
static void
gtk_progress_bar_class_init (GtkProgressBarClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = G_OBJECT_CLASS (class);
widget_class = (GtkWidgetClass *) class;
gobject_class->set_property = gtk_progress_bar_set_property;
gobject_class->get_property = gtk_progress_bar_get_property;
gobject_class->finalize = gtk_progress_bar_finalize;
widget_class->draw = gtk_progress_bar_draw;
widget_class->get_preferred_width = gtk_progress_bar_get_preferred_width;
widget_class->get_preferred_height = gtk_progress_bar_get_preferred_height;
g_object_class_override_property (gobject_class, PROP_ORIENTATION, "orientation");
g_object_class_install_property (gobject_class,
PROP_INVERTED,
g_param_spec_boolean ("inverted",
P_("Inverted"),
P_("Invert the direction in which the progress bar grows"),
FALSE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_FRACTION,
g_param_spec_double ("fraction",
P_("Fraction"),
P_("The fraction of total work that has been completed"),
0.0, 1.0, 0.0,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_PULSE_STEP,
g_param_spec_double ("pulse-step",
P_("Pulse Step"),
P_("The fraction of total progress to move the bouncing block when pulsed"),
0.0, 1.0, 0.1,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_TEXT,
g_param_spec_string ("text",
P_("Text"),
P_("Text to be displayed in the progress bar"),
NULL,
GTK_PARAM_READWRITE));
/**
* GtkProgressBar:show_text:
*
* Sets whether the progressbar will show text superimposed
* over the bar. The shown text is either the value of
* the #GtkProgressBar::text property or, if that is %NULL,
* the #GtkProgressBar::fraction value, as a percentage.
*
* To make a progress bar that is styled and sized suitably for containing
* text (even if the actual text is blank), set #GtkProgressBar:show-text to
* %TRUE and #GtkProgressBar:text to the empty string (not %NULL).
*
* Since: 3.0
*/
g_object_class_install_property (gobject_class,
PROP_SHOW_TEXT,
g_param_spec_boolean ("show-text",
P_("Show text"),
P_("Whether the progress is shown as text."),
FALSE,
GTK_PARAM_READWRITE));
/**
* GtkProgressBar:ellipsize:
*
* The preferred place to ellipsize the string, if the progressbar does
* not have enough room to display the entire string, specified as a
* #PangoEllisizeMode.
*
* Note that setting this property to a value other than
* %PANGO_ELLIPSIZE_NONE has the side-effect that the progressbar requests
* only enough space to display the ellipsis "...". Another means to set a
* progressbar's width is gtk_widget_set_size_request().
*
* Since: 2.6
*/
g_object_class_install_property (gobject_class,
PROP_ELLIPSIZE,
g_param_spec_enum ("ellipsize",
P_("Ellipsize"),
P_("The preferred place to ellipsize the string, if the progress bar "
"does not have enough room to display the entire string, if at all."),
PANGO_TYPE_ELLIPSIZE_MODE,
PANGO_ELLIPSIZE_NONE,
GTK_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("xspacing",
P_("X spacing"),
P_("Extra spacing applied to the width of a progress bar."),
0, G_MAXINT, 7,
G_PARAM_READWRITE));
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("yspacing",
P_("Y spacing"),
P_("Extra spacing applied to the height of a progress bar."),
0, G_MAXINT, 7,
G_PARAM_READWRITE));
/**
* GtkProgressBar:min-horizontal-bar-width:
*
* The minimum horizontal width of the progress bar.
*
* Since: 2.14
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("min-horizontal-bar-width",
P_("Minimum horizontal bar width"),
P_("The minimum horizontal width of the progress bar"),
1, G_MAXINT, MIN_HORIZONTAL_BAR_WIDTH,
G_PARAM_READWRITE));
/**
* GtkProgressBar:min-horizontal-bar-height:
*
* Minimum horizontal height of the progress bar.
*
* Since: 2.14
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("min-horizontal-bar-height",
P_("Minimum horizontal bar height"),
P_("Minimum horizontal height of the progress bar"),
1, G_MAXINT, MIN_HORIZONTAL_BAR_HEIGHT,
G_PARAM_READWRITE));
/**
* GtkProgressBar:min-vertical-bar-width:
*
* The minimum vertical width of the progress bar.
*
* Since: 2.14
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("min-vertical-bar-width",
P_("Minimum vertical bar width"),
P_("The minimum vertical width of the progress bar"),
1, G_MAXINT, MIN_VERTICAL_BAR_WIDTH,
G_PARAM_READWRITE));
/**
* GtkProgressBar:min-vertical-bar-height:
*
* The minimum vertical height of the progress bar.
*
* Since: 2.14
*/
gtk_widget_class_install_style_property (widget_class,
g_param_spec_int ("min-vertical-bar-height",
P_("Minimum vertical bar height"),
P_("The minimum vertical height of the progress bar"),
1, G_MAXINT, MIN_VERTICAL_BAR_HEIGHT,
G_PARAM_READWRITE));
g_type_class_add_private (class, sizeof (GtkProgressBarPrivate));
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_PROGRESS_BAR_ACCESSIBLE);
}
static void
gtk_progress_bar_init (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv;
pbar->priv = G_TYPE_INSTANCE_GET_PRIVATE (pbar,
GTK_TYPE_PROGRESS_BAR,
GtkProgressBarPrivate);
priv = pbar->priv;
priv->orientation = GTK_ORIENTATION_HORIZONTAL;
priv->inverted = FALSE;
priv->pulse_fraction = 0.1;
priv->activity_pos = 0;
priv->activity_dir = 1;
priv->activity_step = 3;
priv->activity_blocks = 5;
priv->ellipsize = PANGO_ELLIPSIZE_NONE;
priv->show_text = FALSE;
priv->text = NULL;
priv->fraction = 0.0;
gtk_widget_set_has_window (GTK_WIDGET (pbar), FALSE);
}
static void
gtk_progress_bar_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkProgressBar *pbar;
pbar = GTK_PROGRESS_BAR (object);
switch (prop_id)
{
case PROP_ORIENTATION:
gtk_progress_bar_set_orientation (pbar, g_value_get_enum (value));
break;
case PROP_INVERTED:
gtk_progress_bar_set_inverted (pbar, g_value_get_boolean (value));
break;
case PROP_FRACTION:
gtk_progress_bar_set_fraction (pbar, g_value_get_double (value));
break;
case PROP_PULSE_STEP:
gtk_progress_bar_set_pulse_step (pbar, g_value_get_double (value));
break;
case PROP_TEXT:
gtk_progress_bar_set_text (pbar, g_value_get_string (value));
break;
case PROP_SHOW_TEXT:
gtk_progress_bar_set_show_text (pbar, g_value_get_boolean (value));
break;
case PROP_ELLIPSIZE:
gtk_progress_bar_set_ellipsize (pbar, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_progress_bar_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (object);
GtkProgressBarPrivate* priv = pbar->priv;
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, priv->orientation);
break;
case PROP_INVERTED:
g_value_set_boolean (value, priv->inverted);
break;
case PROP_FRACTION:
g_value_set_double (value, priv->fraction);
break;
case PROP_PULSE_STEP:
g_value_set_double (value, priv->pulse_fraction);
break;
case PROP_TEXT:
g_value_set_string (value, priv->text);
break;
case PROP_SHOW_TEXT:
g_value_set_boolean (value, priv->show_text);
break;
case PROP_ELLIPSIZE:
g_value_set_enum (value, priv->ellipsize);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_progress_bar_new:
*
* Creates a new #GtkProgressBar.
*
* Returns: a #GtkProgressBar.
*/
GtkWidget*
gtk_progress_bar_new (void)
{
GtkWidget *pbar;
pbar = g_object_new (GTK_TYPE_PROGRESS_BAR, NULL);
return pbar;
}
static void
gtk_progress_bar_real_update (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv;
GtkWidget *widget;
g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
priv = pbar->priv;
widget = GTK_WIDGET (pbar);
if (priv->activity_mode)
{
GtkAllocation allocation;
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
gint size;
gtk_widget_get_allocation (widget, &allocation);
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
/* advance the block */
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
/* Update our activity step. */
priv->activity_step = allocation.width * priv->pulse_fraction;
size = MAX (2, allocation.width / priv->activity_blocks);
if (priv->activity_dir == 0)
{
priv->activity_pos += priv->activity_step;
if (priv->activity_pos + size >= allocation.width - padding.left)
{
priv->activity_pos = allocation.width - padding.left - size;
priv->activity_dir = 1;
}
}
else
{
priv->activity_pos -= priv->activity_step;
if (priv->activity_pos <= padding.left)
{
priv->activity_pos = padding.left;
priv->activity_dir = 0;
}
}
}
else
{
/* Update our activity step. */
priv->activity_step = allocation.height * priv->pulse_fraction;
size = MAX (2, allocation.height / priv->activity_blocks);
if (priv->activity_dir == 0)
{
priv->activity_pos += priv->activity_step;
if (priv->activity_pos + size >= allocation.height - padding.top)
{
priv->activity_pos = allocation.height - padding.top - size;
priv->activity_dir = 1;
}
}
else
{
priv->activity_pos -= priv->activity_step;
if (priv->activity_pos <= padding.top)
{
priv->activity_pos = padding.top;
priv->activity_dir = 0;
}
}
}
}
gtk_widget_queue_draw (widget);
}
static void
gtk_progress_bar_finalize (GObject *object)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (object);
GtkProgressBarPrivate *priv = pbar->priv;
g_free (priv->text);
G_OBJECT_CLASS (gtk_progress_bar_parent_class)->finalize (object);
}
static gchar *
get_current_text (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv = pbar->priv;
if (priv->text)
return g_strdup (priv->text);
else
return g_strdup_printf ("%.0f %%", priv->fraction * 100.0);
}
static void
gtk_progress_bar_get_preferred_width (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkProgressBar *pbar;
GtkProgressBarPrivate *priv;
GtkStyleContext *style_context;
GtkStateFlags state;
GtkBorder padding;
gchar *buf;
PangoRectangle logical_rect;
PangoLayout *layout;
gint width;
gint xspacing;
gint min_width;
g_return_if_fail (GTK_IS_PROGRESS_BAR (widget));
style_context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (style_context, state, &padding);
gtk_widget_style_get (widget,
"xspacing", &xspacing,
NULL);
pbar = GTK_PROGRESS_BAR (widget);
priv = pbar->priv;
width = padding.left + padding.right + xspacing;
if (priv->show_text)
{
buf = get_current_text (pbar);
layout = gtk_widget_create_pango_layout (widget, buf);
pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
if (priv->ellipsize)
{
const PangoFontDescription *font_desc;
PangoContext *context;
PangoFontMetrics *metrics;
gint char_width;
/* The minimum size for ellipsized text is ~ 3 chars */
context = pango_layout_get_context (layout);
font_desc = gtk_style_context_get_font (style_context, state);
metrics = pango_context_get_metrics (context, font_desc, pango_context_get_language (context));
char_width = pango_font_metrics_get_approximate_char_width (metrics);
pango_font_metrics_unref (metrics);
width += PANGO_PIXELS (char_width) * 3;
}
else
width += logical_rect.width;
g_object_unref (layout);
g_free (buf);
}
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_style_get (widget,
"min-horizontal-bar-width", &min_width,
NULL);
else
gtk_widget_style_get (widget,
"min-vertical-bar-width", &min_width,
NULL);
*minimum = *natural = MAX (min_width, width);
}
static void
gtk_progress_bar_get_preferred_height (GtkWidget *widget,
gint *minimum,
gint *natural)
{
GtkProgressBar *pbar;
GtkProgressBarPrivate *priv;
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
gchar *buf;
PangoRectangle logical_rect;
PangoLayout *layout;
gint height;
gint yspacing;
gint min_height;
g_return_if_fail (GTK_IS_PROGRESS_BAR (widget));
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
gtk_widget_style_get (widget,
"yspacing", &yspacing,
NULL);
pbar = GTK_PROGRESS_BAR (widget);
priv = pbar->priv;
height = padding.top + padding.bottom + yspacing;
if (priv->show_text)
{
buf = get_current_text (pbar);
layout = gtk_widget_create_pango_layout (widget, buf);
pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
height += logical_rect.height;
g_object_unref (layout);
g_free (buf);
}
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
gtk_widget_style_get (widget,
"min-horizontal-bar-height", &min_height,
NULL);
else
gtk_widget_style_get (widget,
"min-vertical-bar-height", &min_height,
NULL);
*minimum = *natural = MAX (min_height, height);
}
static void
gtk_progress_bar_act_mode_enter (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv = pbar->priv;
GtkAllocation allocation;
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
GtkWidget *widget = GTK_WIDGET (pbar);
GtkOrientation orientation;
gboolean inverted;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
orientation = priv->orientation;
inverted = priv->inverted;
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
inverted = !inverted;
}
/* calculate start pos */
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
if (!inverted)
{
priv->activity_pos = padding.left;
priv->activity_dir = 0;
}
else
{
gtk_widget_get_allocation (widget, &allocation);
priv->activity_pos = allocation.width - padding.left -
(allocation.height - padding.top - padding.bottom);
priv->activity_dir = 1;
}
}
else
{
if (!inverted)
{
priv->activity_pos = padding.top;
priv->activity_dir = 0;
}
else
{
gtk_widget_get_allocation (widget, &allocation);
priv->activity_pos = allocation.height - padding.top -
(allocation.width - padding.left - padding.right);
priv->activity_dir = 1;
}
}
}
static void
gtk_progress_bar_get_activity (GtkProgressBar *pbar,
GtkOrientation orientation,
gint *offset,
gint *amount)
{
GtkProgressBarPrivate *priv = pbar->priv;
GtkAllocation allocation;
GtkWidget *widget = GTK_WIDGET (pbar);
*offset = priv->activity_pos;
gtk_widget_get_allocation (widget, &allocation);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
*amount = MAX (2, allocation.width / priv->activity_blocks);
else
*amount = MAX (2, allocation.height / priv->activity_blocks);
}
static void
gtk_progress_bar_paint_activity (GtkProgressBar *pbar,
cairo_t *cr,
GtkOrientation orientation,
gboolean inverted,
int width,
int height)
{
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
GtkWidget *widget = GTK_WIDGET (pbar);
GdkRectangle area;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk_progress_bar_get_activity (pbar, orientation, &area.x, &area.width);
area.y = padding.top;
area.height = height - padding.top - padding.bottom;
}
else
{
gtk_progress_bar_get_activity (pbar, orientation, &area.y, &area.height);
area.x = padding.left;
area.width = width - padding.left - padding.right;
}
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
gtk_render_activity (context, cr, area.x, area.y, area.width, area.height);
gtk_style_context_restore (context);
}
static void
gtk_progress_bar_paint_continuous (GtkProgressBar *pbar,
cairo_t *cr,
gint amount,
GtkOrientation orientation,
gboolean inverted,
int width,
int height)
{
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
GtkWidget *widget = GTK_WIDGET (pbar);
GdkRectangle area;
if (amount <= 0)
return;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
area.width = amount;
area.height = height - padding.top - padding.bottom;
area.y = padding.top;
if (!inverted)
area.x = padding.left;
else
area.x = width - amount - padding.right;
}
else
{
area.width = width - padding.left - padding.right;
area.height = amount;
area.x = padding.left;
if (!inverted)
area.y = padding.top;
else
area.y = height - amount - padding.bottom;
}
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
gtk_render_activity (context, cr, area.x, area.y, area.width, area.height);
gtk_style_context_restore (context);
}
static void
gtk_progress_bar_paint_text (GtkProgressBar *pbar,
cairo_t *cr,
gint offset,
gint amount,
GtkOrientation orientation,
gboolean inverted,
int width,
int height)
{
GtkProgressBarPrivate *priv = pbar->priv;
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
GtkWidget *widget = GTK_WIDGET (pbar);
gint x;
gint y;
gchar *buf;
GdkRectangle rect;
PangoLayout *layout;
PangoRectangle logical_rect;
GdkRectangle prelight_clip, start_clip, end_clip;
gfloat text_xalign = 0.5;
gfloat text_yalign = 0.5;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
if (gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
text_xalign = 1.0 - text_xalign;
buf = get_current_text (pbar);
layout = gtk_widget_create_pango_layout (widget, buf);
pango_layout_set_ellipsize (layout, priv->ellipsize);
if (priv->ellipsize)
pango_layout_set_width (layout, width * PANGO_SCALE);
pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
x = padding.left + 1 + text_xalign * (width - padding.left - padding.right - 2 - logical_rect.width);
y = padding.top + 1 + text_yalign * (height - padding.top - padding.bottom - 2 - logical_rect.height);
rect.x = padding.left;
rect.y = padding.top;
rect.width = width - padding.left - padding.right;
rect.height = height - padding.top - padding.bottom;
prelight_clip = start_clip = end_clip = rect;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
if (!inverted)
{
if (offset != -1)
prelight_clip.x = offset;
prelight_clip.width = amount;
start_clip.width = prelight_clip.x - start_clip.x;
end_clip.x = start_clip.x + start_clip.width + prelight_clip.width;
end_clip.width -= prelight_clip.width + start_clip.width;
}
else
{
if (offset != -1)
prelight_clip.x = offset;
else
prelight_clip.x = rect.x + rect.width - amount;
prelight_clip.width = amount;
start_clip.width = prelight_clip.x - start_clip.x;
end_clip.x = start_clip.x + start_clip.width + prelight_clip.width;
end_clip.width -= prelight_clip.width + start_clip.width;
}
}
else
{
if (!inverted)
{
if (offset != -1)
prelight_clip.y = offset;
prelight_clip.height = amount;
start_clip.height = prelight_clip.y - start_clip.y;
end_clip.y = start_clip.y + start_clip.height + prelight_clip.height;
end_clip.height -= prelight_clip.height + start_clip.height;
}
else
{
if (offset != -1)
prelight_clip.y = offset;
else
prelight_clip.y = rect.y + rect.height - amount;
prelight_clip.height = amount;
start_clip.height = prelight_clip.y - start_clip.y;
end_clip.y = start_clip.y + start_clip.height + prelight_clip.height;
end_clip.height -= prelight_clip.height + start_clip.height;
}
}
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
if (start_clip.width > 0 && start_clip.height > 0)
{
cairo_save (cr);
gdk_cairo_rectangle (cr, &start_clip);
cairo_clip (cr);
gtk_render_layout (context, cr, x, y, layout);
cairo_restore (cr);
}
if (end_clip.width > 0 && end_clip.height > 0)
{
cairo_save (cr);
gdk_cairo_rectangle (cr, &end_clip);
cairo_clip (cr);
gtk_render_layout (context, cr, x, y, layout);
cairo_restore (cr);
}
gtk_style_context_restore (context);
cairo_save (cr);
gdk_cairo_rectangle (cr, &prelight_clip);
cairo_clip (cr);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_PROGRESSBAR);
gtk_render_layout (context, cr, x, y, layout);
gtk_style_context_restore (context);
cairo_restore (cr);
g_object_unref (layout);
g_free (buf);
}
static gboolean
gtk_progress_bar_draw (GtkWidget *widget,
cairo_t *cr)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (widget);
GtkProgressBarPrivate *priv = pbar->priv;
GtkOrientation orientation;
gboolean inverted;
GtkStyleContext *context;
GtkStateFlags state;
GtkBorder padding;
int width, height;
context = gtk_widget_get_style_context (widget);
state = gtk_widget_get_state_flags (widget);
gtk_style_context_get_padding (context, state, &padding);
orientation = priv->orientation;
inverted = priv->inverted;
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
inverted = !inverted;
}
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TROUGH);
gtk_render_background (context, cr, 0, 0, width, height);
gtk_render_frame (context, cr, 0, 0, width, height);
gtk_style_context_restore (context);
if (priv->activity_mode)
{
gtk_progress_bar_paint_activity (pbar, cr,
orientation, inverted,
width, height);
if (priv->show_text)
{
gint offset;
gint amount;
gtk_progress_bar_get_activity (pbar, orientation, &offset, &amount);
gtk_progress_bar_paint_text (pbar, cr,
offset, amount,
orientation, inverted,
width, height);
}
}
else
{
gint amount;
gint space;
if (orientation == GTK_ORIENTATION_HORIZONTAL)
space = width - padding.left - padding.right;
else
space = height - padding.top - padding.bottom;
amount = space * gtk_progress_bar_get_fraction (pbar);
gtk_progress_bar_paint_continuous (pbar, cr, amount, orientation, inverted, width, height);
if (priv->show_text)
gtk_progress_bar_paint_text (pbar, cr, -1, amount, orientation, inverted, width, height);
}
return FALSE;
}
static void
gtk_progress_bar_set_activity_mode (GtkProgressBar *pbar,
gboolean activity_mode)
{
GtkProgressBarPrivate *priv = pbar->priv;
activity_mode = !!activity_mode;
if (priv->activity_mode != activity_mode)
{
priv->activity_mode = activity_mode;
if (priv->activity_mode)
gtk_progress_bar_act_mode_enter (pbar);
gtk_widget_queue_resize (GTK_WIDGET (pbar));
}
}
/**
* gtk_progress_bar_set_fraction:
* @pbar: a #GtkProgressBar
* @fraction: fraction of the task that's been completed
*
* Causes the progress bar to "fill in" the given fraction
* of the bar. The fraction should be between 0.0 and 1.0,
* inclusive.
*
**/
void
gtk_progress_bar_set_fraction (GtkProgressBar *pbar,
gdouble fraction)
{
GtkProgressBarPrivate* priv;
g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
priv = pbar->priv;
priv->fraction = fraction;
gtk_progress_bar_set_activity_mode (pbar, FALSE);
gtk_progress_bar_real_update (pbar);
g_object_notify (G_OBJECT (pbar), "fraction");
}
/**
* gtk_progress_bar_pulse:
* @pbar: a #GtkProgressBar
*
* Indicates that some progress is made, but you don't know how much.
* Causes the progress bar to enter "activity mode," where a block
* bounces back and forth. Each call to gtk_progress_bar_pulse()
* causes the block to move by a little bit (the amount of movement
* per pulse is determined by gtk_progress_bar_set_pulse_step()).
**/
void
gtk_progress_bar_pulse (GtkProgressBar *pbar)
{
g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
gtk_progress_bar_set_activity_mode (pbar, TRUE);
gtk_progress_bar_real_update (pbar);
}
/**
* gtk_progress_bar_set_text:
* @pbar: a #GtkProgressBar
* @text: (allow-none): a UTF-8 string, or %NULL
*
* Causes the given @text to appear superimposed on the progress bar.
*
* If @text is %NULL and #GtkProgressBar:show-text is %TRUE, the current
* value of #GtkProgressBar:fraction will be displayed as a percentage.
*
* If @text is non-%NULL and #GtkProgressBar:show-text is %TRUE, the text will
* be displayed. In this case, it will not display the progress percentage.
* If @text is the empty string, the progress bar will still be styled and sized
* suitably for containing text, as long as #GtkProgressBar:show-text is %TRUE.
**/
void
gtk_progress_bar_set_text (GtkProgressBar *pbar,
const gchar *text)
{
GtkProgressBarPrivate *priv;
g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
priv = pbar->priv;
/* Don't notify again if nothing's changed. */
if (g_strcmp0 (priv->text, text) == 0)
return;
g_free (priv->text);
priv->text = g_strdup (text);
gtk_widget_queue_resize (GTK_WIDGET (pbar));
g_object_notify (G_OBJECT (pbar), "text");
}
/**
* gtk_progress_bar_set_show_text:
* @pbar: a #GtkProgressBar
* @show_text: whether to show superimposed text
*
* Sets whether the progressbar will show text superimposed
* over the bar. The shown text is either the value of
* the #GtkProgressBar::text property or, if that is %NULL,
* the #GtkProgressBar::fraction value, as a percentage.
*
* To make a progress bar that is styled and sized suitably for containing
* text (even if the actual text is blank), set #GtkProgressBar:show-text to
* %TRUE and #GtkProgressBar:text to the empty string (not %NULL).
*
* Since: 3.0
*/
void
gtk_progress_bar_set_show_text (GtkProgressBar *pbar,
gboolean show_text)
{
GtkProgressBarPrivate *priv;
g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
priv = pbar->priv;
show_text = !!show_text;
if (priv->show_text != show_text)
{
priv->show_text = show_text;
gtk_widget_queue_resize (GTK_WIDGET (pbar));
g_object_notify (G_OBJECT (pbar), "show-text");
}
}
/**
* gtk_progress_bar_get_show_text:
* @pbar: a #GtkProgressBar
*
* Gets the value of the #GtkProgressBar::show-text property.
* See gtk_progress_bar_set_show_text().
*
* Returns: %TRUE if text is shown in the progress bar
*
* Since: 3.0
*/
gboolean
gtk_progress_bar_get_show_text (GtkProgressBar *pbar)
{
g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), FALSE);
return pbar->priv->show_text;
}
/**
* gtk_progress_bar_set_pulse_step:
* @pbar: a #GtkProgressBar
* @fraction: fraction between 0.0 and 1.0
*
* Sets the fraction of total progress bar length to move the
* bouncing block for each call to gtk_progress_bar_pulse().
**/
void
gtk_progress_bar_set_pulse_step (GtkProgressBar *pbar,
gdouble fraction)
{
GtkProgressBarPrivate *priv;
g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
priv = pbar->priv;
priv->pulse_fraction = fraction;
g_object_notify (G_OBJECT (pbar), "pulse-step");
}
static void
gtk_progress_bar_set_orientation (GtkProgressBar *pbar,
GtkOrientation orientation)
{
GtkProgressBarPrivate *priv = pbar->priv;
if (priv->orientation != orientation)
{
priv->orientation = orientation;
_gtk_orientable_set_style_classes (GTK_ORIENTABLE (pbar));
gtk_widget_queue_resize (GTK_WIDGET (pbar));
}
}
/**
* gtk_progress_bar_set_inverted:
* @pbar: a #GtkProgressBar
* @inverted: %TRUE to invert the progress bar
*
* Progress bars normally grow from top to bottom or left to right.
* Inverted progress bars grow in the opposite direction.
*/
void
gtk_progress_bar_set_inverted (GtkProgressBar *pbar,
gboolean inverted)
{
GtkProgressBarPrivate *priv;
g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
priv = pbar->priv;
if (priv->inverted != inverted)
{
priv->inverted = inverted;
gtk_widget_queue_resize (GTK_WIDGET (pbar));
g_object_notify (G_OBJECT (pbar), "inverted");
}
}
/**
* gtk_progress_bar_get_text:
* @pbar: a #GtkProgressBar
*
* Retrieves the text displayed superimposed on the progress bar,
* if any, otherwise %NULL. The return value is a reference
* to the text, not a copy of it, so will become invalid
* if you change the text in the progress bar.
*
* Return value: text, or %NULL; this string is owned by the widget
* and should not be modified or freed.
**/
const gchar*
gtk_progress_bar_get_text (GtkProgressBar *pbar)
{
g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), NULL);
return pbar->priv->text;
}
/**
* gtk_progress_bar_get_fraction:
* @pbar: a #GtkProgressBar
*
* Returns the current fraction of the task that's been completed.
*
* Return value: a fraction from 0.0 to 1.0
**/
gdouble
gtk_progress_bar_get_fraction (GtkProgressBar *pbar)
{
g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), 0);
return pbar->priv->fraction;
}
/**
* gtk_progress_bar_get_pulse_step:
* @pbar: a #GtkProgressBar
*
* Retrieves the pulse step set with gtk_progress_bar_set_pulse_step()
*
* Return value: a fraction from 0.0 to 1.0
**/
gdouble
gtk_progress_bar_get_pulse_step (GtkProgressBar *pbar)
{
g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), 0);
return pbar->priv->pulse_fraction;
}
/**
* gtk_progress_bar_get_inverted:
* @pbar: a #GtkProgressBar
*
* Gets the value set by gtk_progress_bar_set_inverted()
*
* Return value: %TRUE if the progress bar is inverted
*/
gboolean
gtk_progress_bar_get_inverted (GtkProgressBar *pbar)
{
g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), FALSE);
return pbar->priv->inverted;
}
/**
* gtk_progress_bar_set_ellipsize:
* @pbar: a #GtkProgressBar
* @mode: a #PangoEllipsizeMode
*
* Sets the mode used to ellipsize (add an ellipsis: "...") the text
* if there is not enough space to render the entire string.
*
* Since: 2.6
**/
void
gtk_progress_bar_set_ellipsize (GtkProgressBar *pbar,
PangoEllipsizeMode mode)
{
GtkProgressBarPrivate *priv;
g_return_if_fail (GTK_IS_PROGRESS_BAR (pbar));
g_return_if_fail (mode >= PANGO_ELLIPSIZE_NONE &&
mode <= PANGO_ELLIPSIZE_END);
priv = pbar->priv;
if ((PangoEllipsizeMode)priv->ellipsize != mode)
{
priv->ellipsize = mode;
g_object_notify (G_OBJECT (pbar), "ellipsize");
gtk_widget_queue_resize (GTK_WIDGET (pbar));
}
}
/**
* gtk_progress_bar_get_ellipsize:
* @pbar: a #GtkProgressBar
*
* Returns the ellipsizing position of the progressbar.
* See gtk_progress_bar_set_ellipsize().
*
* Return value: #PangoEllipsizeMode
*
* Since: 2.6
**/
PangoEllipsizeMode
gtk_progress_bar_get_ellipsize (GtkProgressBar *pbar)
{
g_return_val_if_fail (GTK_IS_PROGRESS_BAR (pbar), PANGO_ELLIPSIZE_NONE);
return pbar->priv->ellipsize;
}
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