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gtk2/gtk/gtkprogressbar.c
Timm Bäder 68a5f6519c progressbar: Use widgets for all subgadgets 
A GtkLabel for the possible text node and two GtkGizmos for the
trough/progress gadgets.
2017-04-25 20:30:36 +02:00

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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, see <http://www.gnu.org/licenses/>.
*/
/*
* 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 "gtkwidgetprivate.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkcssshadowsvalueprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkcsscustomgadgetprivate.h"
#include "gtkcssnumbervalueprivate.h"
#include "gtkprogresstrackerprivate.h"
#include "gtkgizmoprivate.h"
#include "a11y/gtkprogressbaraccessible.h"
#include "fallback-c89.c"
/**
* 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.
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* progressbar[.osd]
* ├── [text]
* ╰── trough[.empty][.full]
* ╰── progress[.pulse]
* ]|
*
* GtkProgressBar has a main CSS node with name progressbar and subnodes with
* names text and trough, of which the latter has a subnode named progress. The
* text subnode is only present if text is shown. The progress subnode has the
* style class .pulse when in activity mode. It gets the style classes .left,
* .right, .top or .bottom added when the progress 'touches' the corresponding
* end of the GtkProgressBar. The .osd class on the progressbar node is for use
* in overlays like the one Epiphany has for page loading progress.
*/
struct _GtkProgressBarPrivate
{
gchar *text;
GtkWidget *label;
GtkWidget *trough_widget;
GtkWidget *progress_widget;
GtkCssGadget *gadget;
gdouble fraction;
gdouble pulse_fraction;
double activity_pos;
guint activity_blocks;
GtkOrientation orientation;
guint tick_id;
GtkProgressTracker tracker;
gint64 pulse1;
gint64 pulse2;
gdouble last_iteration;
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_INVERTED,
PROP_TEXT,
PROP_SHOW_TEXT,
PROP_ELLIPSIZE,
PROP_ORIENTATION,
NUM_PROPERTIES = PROP_ORIENTATION
};
static GParamSpec *progress_props[NUM_PROPERTIES] = { NULL, };
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_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_progress_bar_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot);
static void gtk_progress_bar_act_mode_enter (GtkProgressBar *progress);
static void gtk_progress_bar_act_mode_leave (GtkProgressBar *progress);
static void gtk_progress_bar_finalize (GObject *object);
static void gtk_progress_bar_set_orientation (GtkProgressBar *progress,
GtkOrientation orientation);
static void gtk_progress_bar_direction_changed (GtkWidget *widget,
GtkTextDirection previous_dir);
static void gtk_progress_bar_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state);
static void gtk_progress_bar_measure_ (GtkWidget *widget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline);
static void gtk_progress_bar_measure (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer data);
static void gtk_progress_bar_allocate (GtkCssGadget *gadget,
const GtkAllocation *allocation,
gint baseline,
GtkAllocation *out_clip,
gpointer data);
static gboolean gtk_progress_bar_render (GtkCssGadget *gadget,
GtkSnapshot *snapshot,
gint x,
gint y,
gint width,
gint height,
gpointer data);
G_DEFINE_TYPE_WITH_CODE (GtkProgressBar, gtk_progress_bar, GTK_TYPE_WIDGET,
G_ADD_PRIVATE (GtkProgressBar)
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->snapshot = gtk_progress_bar_snapshot;
widget_class->size_allocate = gtk_progress_bar_size_allocate;
widget_class->measure = gtk_progress_bar_measure_;
widget_class->direction_changed = gtk_progress_bar_direction_changed;
widget_class->state_flags_changed = gtk_progress_bar_state_flags_changed;
g_object_class_override_property (gobject_class, PROP_ORIENTATION, "orientation");
progress_props[PROP_INVERTED] =
g_param_spec_boolean ("inverted",
P_("Inverted"),
P_("Invert the direction in which the progress bar grows"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
progress_props[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_PARAM_EXPLICIT_NOTIFY);
progress_props[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_PARAM_EXPLICIT_NOTIFY);
progress_props[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 progress bar will show a text in addition
* to the bar itself. 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
* showing 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
*/
progress_props[PROP_SHOW_TEXT] =
g_param_spec_boolean ("show-text",
P_("Show text"),
P_("Whether the progress is shown as text."),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkProgressBar:ellipsize:
*
* The preferred place to ellipsize the string, if the progress bar does
* not have enough room to display the entire string, specified as a
* #PangoEllipsizeMode.
*
* Note that setting this property to a value other than
* %PANGO_ELLIPSIZE_NONE has the side-effect that the progress bar requests
* only enough space to display the ellipsis ("..."). Another means to set a
* progress bar's width is gtk_widget_set_size_request().
*
* Since: 2.6
*/
progress_props[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|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, NUM_PROPERTIES, progress_props);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_PROGRESS_BAR_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, "progressbar");
}
static void
update_fraction_classes (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv = pbar->priv;
GtkStyleContext *context;
gboolean empty = FALSE;
gboolean full = FALSE;
/* Here we set classes based on fill-level unless we're in activity-mode.
*/
if (!priv->activity_mode)
{
if (priv->fraction <= 0.0)
empty = TRUE;
else if (priv->fraction >= 1.0)
full = TRUE;
}
context = gtk_widget_get_style_context (priv->trough_widget);
if (empty)
gtk_style_context_add_class (context, "empty");
else
gtk_style_context_remove_class (context, "empty");
if (full)
gtk_style_context_add_class (context, "full");
else
gtk_style_context_remove_class (context, "full");
}
static void
update_node_classes (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv = pbar->priv;
GtkStyleContext *context;
gboolean left = FALSE;
gboolean right = FALSE;
gboolean top = FALSE;
gboolean bottom = FALSE;
/* Here we set positional classes, depending on which end of the
* progressbar the progress touches.
*/
if (priv->activity_mode)
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
left = priv->activity_pos <= 0.0;
right = priv->activity_pos >= 1.0;
}
else
{
top = priv->activity_pos <= 0.0;
bottom = priv->activity_pos >= 1.0;
}
}
else /* continuous */
{
gboolean inverted;
inverted = priv->inverted;
if (gtk_widget_get_direction (GTK_WIDGET (pbar)) == GTK_TEXT_DIR_RTL)
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
inverted = !inverted;
}
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
left = !inverted || priv->fraction >= 1.0;
right = inverted || priv->fraction >= 1.0;
}
else
{
top = !inverted || priv->fraction >= 1.0;
bottom = inverted || priv->fraction >= 1.0;
}
}
context = gtk_widget_get_style_context (priv->progress_widget);
if (left)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
else
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_LEFT);
if (right)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
else
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
if (top)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
else
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP);
if (bottom)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
else
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM);
update_fraction_classes (pbar);
}
static void
update_node_state (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv = pbar->priv;
GtkStateFlags state;
state = gtk_widget_get_state_flags (GTK_WIDGET (pbar));
gtk_css_gadget_set_state (priv->gadget, state);
}
static void
allocate_trough (GtkGizmo *gizmo,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (gtk_widget_get_parent (GTK_WIDGET (gizmo)));
GtkProgressBarPrivate *priv = pbar->priv;
GtkAllocation alloc;
gint width, height;
gboolean inverted;
inverted = priv->inverted;
if (gtk_widget_get_direction (GTK_WIDGET (pbar)) == GTK_TEXT_DIR_RTL)
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
inverted = !inverted;
}
gtk_widget_measure (priv->progress_widget, GTK_ORIENTATION_VERTICAL, -1,
&height, NULL,
NULL, NULL);
gtk_widget_measure (priv->progress_widget, GTK_ORIENTATION_HORIZONTAL, -1,
&width, NULL,
NULL, NULL);
if (priv->activity_mode)
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
alloc.width = width + (allocation->width - width) / priv->activity_blocks;
alloc.x = allocation->x + priv->activity_pos * (allocation->width - alloc.width);
alloc.y = allocation->y + (allocation->height - height) / 2;
alloc.height = height;
}
else
{
alloc.height = height + (allocation->height - height) / priv->activity_blocks;
alloc.y = allocation->y + priv->activity_pos * (allocation->height - alloc.height);
alloc.x = allocation->x + (allocation->width - width) / 2;
alloc.width = width;
}
}
else
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
alloc.width = width + (allocation->width - width) * priv->fraction;
alloc.height = height;
alloc.y = allocation->y + (allocation->height - height) / 2;
if (!inverted)
alloc.x = allocation->x;
else
alloc.x = allocation->x + allocation->width - alloc.width;
}
else
{
alloc.width = width;
alloc.height = height + (allocation->height - height) * priv->fraction;
alloc.x = allocation->x + (allocation->width - width) / 2;
if (!inverted)
alloc.y = allocation->y;
else
alloc.y = allocation->y + allocation->height - alloc.height;
}
}
gtk_widget_size_allocate (priv->progress_widget, &alloc);
gtk_widget_get_clip (priv->progress_widget, out_clip);
}
static gboolean
snapshot_trough (GtkGizmo *gizmo,
GtkSnapshot *snapshot)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (gtk_widget_get_parent (GTK_WIDGET (gizmo)));
gtk_widget_snapshot_child (GTK_WIDGET (gizmo), pbar->priv->progress_widget, snapshot);
return FALSE;
}
static void
gtk_progress_bar_init (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv;
GtkCssNode *widget_node;
pbar->priv = gtk_progress_bar_get_instance_private (pbar);
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_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);
_gtk_orientable_set_style_classes (GTK_ORIENTABLE (pbar));
widget_node = gtk_widget_get_css_node (GTK_WIDGET (pbar));
priv->gadget = gtk_css_custom_gadget_new_for_node (widget_node,
GTK_WIDGET (pbar),
gtk_progress_bar_measure,
gtk_progress_bar_allocate,
gtk_progress_bar_render,
NULL,
NULL);
priv->trough_widget = gtk_gizmo_new ("trough",
NULL,
allocate_trough,
snapshot_trough);
gtk_widget_set_parent (priv->trough_widget, GTK_WIDGET (pbar));
priv->progress_widget = gtk_gizmo_new ("progress", NULL, NULL, NULL);
gtk_widget_set_parent (priv->progress_widget, priv->trough_widget);
update_node_state (pbar);
update_node_classes (pbar);
}
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_finalize (GObject *object)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (object);
GtkProgressBarPrivate *priv = pbar->priv;
if (priv->activity_mode)
gtk_progress_bar_act_mode_leave (pbar);
g_free (priv->text);
if (priv->label)
gtk_widget_unparent (priv->label);
gtk_widget_unparent (priv->progress_widget);
gtk_widget_unparent (priv->trough_widget);
g_clear_object (&priv->gadget);
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 (C_("progress bar label", "%.0f %%"), priv->fraction * 100.0);
}
static void
gtk_progress_bar_measure (GtkCssGadget *gadget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline,
gpointer data)
{
GtkWidget *widget;
GtkProgressBar *pbar;
GtkProgressBarPrivate *priv;
gint text_minimum, text_natural;
gint trough_minimum, trough_natural;
widget = gtk_css_gadget_get_owner (gadget);
pbar = GTK_PROGRESS_BAR (widget);
priv = pbar->priv;
if (priv->show_text)
gtk_widget_measure (priv->label, orientation, -1,
&text_minimum, &text_natural,
NULL, NULL);
else
text_minimum = text_natural = 0;
gtk_widget_measure (priv->trough_widget, orientation, -1,
&trough_minimum, &trough_natural,
NULL, NULL);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
*minimum = MAX (text_minimum, trough_minimum);
*natural = MAX (text_natural, trough_natural);
}
else
{
*minimum = text_minimum + trough_minimum;
*natural = text_natural + trough_natural;
}
}
else
{
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
*minimum = text_minimum + trough_minimum;
*natural = text_natural + trough_natural;
}
else
{
*minimum = MAX (text_minimum, trough_minimum);
*natural = MAX (text_natural, trough_natural);
}
}
}
static void
gtk_progress_bar_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkAllocation clip;
GTK_WIDGET_CLASS (gtk_progress_bar_parent_class)->size_allocate (widget, allocation);
gtk_css_gadget_allocate (GTK_PROGRESS_BAR (widget)->priv->gadget,
allocation,
gtk_widget_get_allocated_baseline (widget),
&clip);
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_progress_bar_allocate (GtkCssGadget *gadget,
const GtkAllocation *allocation,
int baseline,
GtkAllocation *out_clip,
gpointer data)
{
GtkWidget *widget;
GtkProgressBarPrivate *priv;
gint bar_width, bar_height;
gint text_width, text_height, text_min, text_nat;
GtkAllocation alloc;
GtkAllocation text_clip;
widget = gtk_css_gadget_get_owner (gadget);
priv = GTK_PROGRESS_BAR (widget)->priv;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gtk_widget_measure (priv->trough_widget, GTK_ORIENTATION_VERTICAL, -1,
&bar_height, NULL,
NULL, NULL);
bar_width = allocation->width;
}
else
{
gtk_widget_measure (priv->trough_widget, GTK_ORIENTATION_HORIZONTAL, -1,
&bar_width, NULL,
NULL, NULL);
bar_height = allocation->height;
}
alloc.x = allocation->x + allocation->width - bar_width;
alloc.y = allocation->y + allocation->height - bar_height;
alloc.width = bar_width;
alloc.height = bar_height;
gtk_widget_size_allocate (priv->trough_widget, &alloc);
gtk_widget_get_clip (priv->trough_widget, out_clip);
if (!priv->show_text)
return;
gtk_widget_measure (priv->label, GTK_ORIENTATION_HORIZONTAL, -1,
&text_min, &text_nat,
NULL, NULL);
gtk_widget_measure (priv->label, GTK_ORIENTATION_VERTICAL, -1,
&text_height, NULL,
NULL, NULL);
text_width = CLAMP (text_nat, text_min, allocation->width);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
alloc.x = allocation->x + (allocation->width - text_width) / 2;
alloc.y = allocation->y;
alloc.width = text_width;
alloc.height = text_height;
}
else
{
alloc.x = allocation->x + allocation->width - text_width;
alloc.y = allocation->y + (allocation->height - text_height) / 2;
alloc.width = text_width;
alloc.height = text_height;
}
gtk_widget_size_allocate (priv->label, &alloc);
gtk_widget_get_clip (priv->label, &text_clip);
gdk_rectangle_union (out_clip, &text_clip, out_clip);
}
static void
gtk_progress_bar_measure_ (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
gtk_css_gadget_get_preferred_size (GTK_PROGRESS_BAR (widget)->priv->gadget,
orientation,
for_size,
minimum, natural,
minimum_baseline, natural_baseline);
}
static gboolean
tick_cb (GtkWidget *widget,
GdkFrameClock *frame_clock,
gpointer user_data)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (widget);
GtkProgressBarPrivate *priv = pbar->priv;
gint64 frame_time;
gdouble iteration, pulse_iterations, current_iterations, fraction;
if (priv->pulse2 == 0 && priv->pulse1 == 0)
return G_SOURCE_CONTINUE;
frame_time = gdk_frame_clock_get_frame_time (frame_clock);
gtk_progress_tracker_advance_frame (&priv->tracker, frame_time);
g_assert (priv->pulse2 > priv->pulse1);
pulse_iterations = (priv->pulse2 - priv->pulse1) / (gdouble) G_USEC_PER_SEC;
current_iterations = (frame_time - priv->pulse1) / (gdouble) G_USEC_PER_SEC;
iteration = gtk_progress_tracker_get_iteration (&priv->tracker);
/* Determine the fraction to move the block from one frame
* to the next when pulse_fraction is how far the block should
* move between two calls to gtk_progress_bar_pulse().
*/
fraction = priv->pulse_fraction * (iteration - priv->last_iteration) / MAX (pulse_iterations, current_iterations);
priv->last_iteration = iteration;
if (current_iterations > 3 * pulse_iterations)
return G_SOURCE_CONTINUE;
/* advance the block */
if (priv->activity_dir == 0)
{
priv->activity_pos += fraction;
if (priv->activity_pos > 1.0)
{
priv->activity_pos = 1.0;
priv->activity_dir = 1;
}
}
else
{
priv->activity_pos -= fraction;
if (priv->activity_pos <= 0)
{
priv->activity_pos = 0;
priv->activity_dir = 0;
}
}
update_node_classes (pbar);
gtk_widget_queue_allocate (priv->trough_widget);
return G_SOURCE_CONTINUE;
}
static void
gtk_progress_bar_act_mode_enter (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv = pbar->priv;
GtkWidget *widget = GTK_WIDGET (pbar);
gboolean inverted;
gtk_style_context_add_class (gtk_widget_get_style_context (priv->progress_widget), GTK_STYLE_CLASS_PULSE);
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 (!inverted)
{
priv->activity_pos = 0.0;
priv->activity_dir = 0;
}
else
{
priv->activity_pos = 1.0;
priv->activity_dir = 1;
}
update_node_classes (pbar);
/* No fixed schedule for pulses, will adapt after calls to update_pulse. Just
* start the tracker to repeat forever with iterations every second.*/
gtk_progress_tracker_start (&priv->tracker, G_USEC_PER_SEC, 0, INFINITY);
priv->tick_id = gtk_widget_add_tick_callback (widget, tick_cb, NULL, NULL);
priv->pulse2 = 0;
priv->pulse1 = 0;
priv->last_iteration = 0;
}
static void
gtk_progress_bar_act_mode_leave (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv = pbar->priv;
if (priv->tick_id)
gtk_widget_remove_tick_callback (GTK_WIDGET (pbar), priv->tick_id);
priv->tick_id = 0;
gtk_style_context_remove_class (gtk_widget_get_style_context (priv->progress_widget),
GTK_STYLE_CLASS_PULSE);
update_node_classes (pbar);
}
static gboolean
gtk_progress_bar_render (GtkCssGadget *gadget,
GtkSnapshot *snapshot,
int x,
int y,
int width,
int height,
gpointer data)
{
GtkWidget *widget;
GtkProgressBarPrivate *priv;
widget = gtk_css_gadget_get_owner (gadget);
priv = GTK_PROGRESS_BAR (widget)->priv;
gtk_widget_snapshot_child (widget, priv->trough_widget, snapshot);
if (priv->show_text)
gtk_widget_snapshot_child (widget, priv->label, snapshot);
return FALSE;
}
static void
gtk_progress_bar_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (widget);
GtkProgressBarPrivate *priv = pbar->priv;
gtk_css_gadget_snapshot (priv->gadget, snapshot);
}
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);
else
gtk_progress_bar_act_mode_leave (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 = CLAMP (fraction, 0.0, 1.0);
if (priv->label)
{
char *text = get_current_text (pbar);
gtk_label_set_label (GTK_LABEL (priv->label), text);
g_free (text);
}
gtk_progress_bar_set_activity_mode (pbar, FALSE);
gtk_widget_queue_allocate (priv->trough_widget);
update_fraction_classes (pbar);
g_object_notify_by_pspec (G_OBJECT (pbar), progress_props[PROP_FRACTION]);
}
static void
gtk_progress_bar_update_pulse (GtkProgressBar *pbar)
{
GtkProgressBarPrivate *priv = pbar->priv;
gint64 pulse_time = g_get_monotonic_time ();
if (priv->pulse2 == pulse_time)
return;
priv->pulse1 = priv->pulse2;
priv->pulse2 = pulse_time;
}
/**
* gtk_progress_bar_pulse:
* @pbar: a #GtkProgressBar
*
* Indicates that some progress has been 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_update_pulse (pbar);
}
/**
* gtk_progress_bar_set_text:
* @pbar: a #GtkProgressBar
* @text: (allow-none): a UTF-8 string, or %NULL
*
* Causes the given @text to appear next to 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);
if (priv->label)
gtk_label_set_label (GTK_LABEL (priv->label), text);
gtk_widget_queue_resize (GTK_WIDGET (pbar));
g_object_notify_by_pspec (G_OBJECT (pbar), progress_props[PROP_TEXT]);
}
/**
* gtk_progress_bar_set_show_text:
* @pbar: a #GtkProgressBar
* @show_text: whether to show superimposed text
*
* Sets whether the progress bar will show text next to 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)
return;
priv->show_text = show_text;
if (show_text)
{
char *text = get_current_text (pbar);
priv->label = g_object_new (GTK_TYPE_LABEL,
"css-name", "text",
"label", text,
"ellipsize", priv->ellipsize,
NULL);
gtk_widget_insert_after (priv->label, GTK_WIDGET (pbar), NULL);
update_node_state (pbar);
g_free (text);
}
else
{
if (priv->label)
{
gtk_widget_unparent (priv->label);
priv->label = NULL;
}
}
gtk_widget_queue_resize (GTK_WIDGET (pbar));
g_object_notify_by_pspec (G_OBJECT (pbar), progress_props[PROP_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_by_pspec (G_OBJECT (pbar), progress_props[PROP_PULSE_STEP]);
}
static void
gtk_progress_bar_direction_changed (GtkWidget *widget,
GtkTextDirection previous_dir)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (widget);
update_node_classes (pbar);
update_node_state (pbar);
GTK_WIDGET_CLASS (gtk_progress_bar_parent_class)->direction_changed (widget, previous_dir);
}
static void
gtk_progress_bar_state_flags_changed (GtkWidget *widget,
GtkStateFlags previous_state)
{
GtkProgressBar *pbar = GTK_PROGRESS_BAR (widget);
update_node_state (pbar);
GTK_WIDGET_CLASS (gtk_progress_bar_parent_class)->state_flags_changed (widget, previous_state);
}
static void
gtk_progress_bar_set_orientation (GtkProgressBar *pbar,
GtkOrientation orientation)
{
GtkProgressBarPrivate *priv = pbar->priv;
if (priv->orientation == orientation)
return;
priv->orientation = orientation;
_gtk_orientable_set_style_classes (GTK_ORIENTABLE (pbar));
update_node_classes (pbar);
gtk_widget_queue_resize (GTK_WIDGET (pbar));
g_object_notify (G_OBJECT (pbar), "orientation");
}
/**
* 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)
return;
priv->inverted = inverted;
update_node_classes (pbar);
gtk_widget_queue_resize (GTK_WIDGET (pbar));
g_object_notify_by_pspec (G_OBJECT (pbar), progress_props[PROP_INVERTED]);
}
/**
* gtk_progress_bar_get_text:
* @pbar: a #GtkProgressBar
*
* Retrieves the text that is displayed with 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.
*
* Returns: (nullable): 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.
*
* Returns: 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().
*
* Returns: 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().
*
* Returns: %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;
if (priv->label)
gtk_label_set_ellipsize (GTK_LABEL (priv->label), mode);
g_object_notify_by_pspec (G_OBJECT (pbar), progress_props[PROP_ELLIPSIZE]);
gtk_widget_queue_resize (GTK_WIDGET (pbar));
}
}
/**
* gtk_progress_bar_get_ellipsize:
* @pbar: a #GtkProgressBar
*
* Returns the ellipsizing position of the progress bar.
* See gtk_progress_bar_set_ellipsize().
*
* Returns: #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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