GtkProgressBar

GtkProgressBar — A widget which indicates progress visually

Synopsis


#include <gtk/gtk.h>


                    GtkProgressBar;
GtkWidget*          gtk_progress_bar_new                (void);
void                gtk_progress_bar_pulse              (GtkProgressBar *pbar);
void                gtk_progress_bar_set_text           (GtkProgressBar *pbar,
                                                         const gchar *text);
void                gtk_progress_bar_set_fraction       (GtkProgressBar *pbar,
                                                         gdouble fraction);
void                gtk_progress_bar_set_pulse_step     (GtkProgressBar *pbar,
                                                         gdouble fraction);
void                gtk_progress_bar_set_orientation    (GtkProgressBar *pbar,
                                                         GtkProgressBarOrientation orientation);
void                gtk_progress_bar_set_ellipsize      (GtkProgressBar *pbar,
                                                         PangoEllipsizeMode mode);
enum                GtkProgressBarOrientation;
const gchar*        gtk_progress_bar_get_text           (GtkProgressBar *pbar);
gdouble             gtk_progress_bar_get_fraction       (GtkProgressBar *pbar);
gdouble             gtk_progress_bar_get_pulse_step     (GtkProgressBar *pbar);
GtkProgressBarOrientation gtk_progress_bar_get_orientation
                                                        (GtkProgressBar *pbar);
PangoEllipsizeMode  gtk_progress_bar_get_ellipsize      (GtkProgressBar *pbar);
GtkWidget*          gtk_progress_bar_new_with_adjustment
                                                        (GtkAdjustment *adjustment);
void                gtk_progress_bar_set_bar_style      (GtkProgressBar *pbar,
                                                         GtkProgressBarStyle style);
enum                GtkProgressBarStyle;
void                gtk_progress_bar_set_discrete_blocks
                                                        (GtkProgressBar *pbar,
                                                         guint blocks);
void                gtk_progress_bar_set_activity_step  (GtkProgressBar *pbar,
                                                         guint step);
void                gtk_progress_bar_set_activity_blocks
                                                        (GtkProgressBar *pbar,
                                                         guint blocks);
void                gtk_progress_bar_update             (GtkProgressBar *pbar,
                                                         gdouble percentage);

Object Hierarchy


  GObject
   +----GInitiallyUnowned
         +----GtkObject
               +----GtkWidget
                     +----GtkProgress
                           +----GtkProgressBar

Implemented Interfaces

GtkProgressBar implements AtkImplementorIface.

Properties


  "activity-blocks"          guint                 : Read / Write
  "activity-step"            guint                 : Read / Write
  "adjustment"               GtkAdjustment         : Read / Write
  "bar-style"                GtkProgressBarStyle   : Read / Write
  "discrete-blocks"          guint                 : Read / Write
  "ellipsize"                PangoEllipsizeMode    : Read / Write
  "fraction"                 gdouble               : Read / Write
  "orientation"              GtkProgressBarOrientation  : Read / Write
  "pulse-step"               gdouble               : Read / Write
  "text"                     gchararray            : Read / Write

Description

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() perodically 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.

Note

The GtkProgressBar/GtkProgress API in GTK 1.2 was bloated, needlessly complex and hard to use properly. Therefore GtkProgress has been deprecated completely and the GtkProgressBar API has been reduced to the following 10 functions: gtk_progress_bar_new(), gtk_progress_bar_pulse(), gtk_progress_bar_set_text(), gtk_progress_bar_set_fraction(), gtk_progress_bar_set_pulse_step(), gtk_progress_bar_set_orientation(), gtk_progress_bar_get_text(), gtk_progress_bar_get_fraction(), gtk_progress_bar_get_pulse_step(), gtk_progress_bar_get_orientation(). These have been grouped at the beginning of this section, followed by a large chunk of deprecated 1.2 compatibility functions.

Details

GtkProgressBar

typedef struct _GtkProgressBar GtkProgressBar;

The GtkProgressBar struct contains private data only, and should be accessed using the functions below.

gtk_progress_bar_new ()

GtkWidget*          gtk_progress_bar_new                (void);

Creates a new GtkProgressBar.

Returns : a GtkProgressBar.

gtk_progress_bar_pulse ()

void                gtk_progress_bar_pulse              (GtkProgressBar *pbar);

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()).

pbar : a GtkProgressBar

gtk_progress_bar_set_text ()

void                gtk_progress_bar_set_text           (GtkProgressBar *pbar,
                                                         const gchar *text);

Causes the given text to appear superimposed on the progress bar.

pbar : a GtkProgressBar
text : a UTF-8 string, or NULL

gtk_progress_bar_set_fraction ()

void                gtk_progress_bar_set_fraction       (GtkProgressBar *pbar,
                                                         gdouble fraction);

Causes the progress bar to "fill in" the given fraction of the bar. The fraction should be between 0.0 and 1.0, inclusive.

pbar : a GtkProgressBar
fraction : fraction of the task that's been completed

gtk_progress_bar_set_pulse_step ()

void                gtk_progress_bar_set_pulse_step     (GtkProgressBar *pbar,
                                                         gdouble fraction);

Sets the fraction of total progress bar length to move the bouncing block for each call to gtk_progress_bar_pulse().

pbar : a GtkProgressBar
fraction : fraction between 0.0 and 1.0

gtk_progress_bar_set_orientation ()

void                gtk_progress_bar_set_orientation    (GtkProgressBar *pbar,
                                                         GtkProgressBarOrientation orientation);

Causes the progress bar to switch to a different orientation (left-to-right, right-to-left, top-to-bottom, or bottom-to-top).

pbar : a GtkProgressBar
orientation : orientation of the progress bar

gtk_progress_bar_set_ellipsize ()

void                gtk_progress_bar_set_ellipsize      (GtkProgressBar *pbar,
                                                         PangoEllipsizeMode mode);

Sets the mode used to ellipsize (add an ellipsis: "...") the text if there is not enough space to render the entire string.

pbar : a GtkProgressBar
mode : a PangoEllipsizeMode

Since 2.6

enum GtkProgressBarOrientation

typedef enum
{
  GTK_PROGRESS_LEFT_TO_RIGHT,
  GTK_PROGRESS_RIGHT_TO_LEFT,
  GTK_PROGRESS_BOTTOM_TO_TOP,
  GTK_PROGRESS_TOP_TO_BOTTOM
} GtkProgressBarOrientation;

An enumeration representing possible orientations and growth directions for the visible progress bar.

GTK_PROGRESS_LEFT_TO_RIGHT A horizontal progress bar growing from left to right.
GTK_PROGRESS_RIGHT_TO_LEFT A horizontal progress bar growing from right to left.
GTK_PROGRESS_BOTTOM_TO_TOP A vertical progress bar growing from bottom to top.
GTK_PROGRESS_TOP_TO_BOTTOM A vertical progress bar growing from top to bottom.

gtk_progress_bar_get_text ()

const gchar*        gtk_progress_bar_get_text           (GtkProgressBar *pbar);

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.

pbar : a GtkProgressBar
Returns : text, or NULL; this string is owned by the widget and should not be modified or freed.

gtk_progress_bar_get_fraction ()

gdouble             gtk_progress_bar_get_fraction       (GtkProgressBar *pbar);

Returns the current fraction of the task that's been completed.

pbar : a GtkProgressBar
Returns : a fraction from 0.0 to 1.0

gtk_progress_bar_get_pulse_step ()

gdouble             gtk_progress_bar_get_pulse_step     (GtkProgressBar *pbar);

Retrieves the pulse step set with gtk_progress_bar_set_pulse_step()

pbar : a GtkProgressBar
Returns : a fraction from 0.0 to 1.0

gtk_progress_bar_get_orientation ()

GtkProgressBarOrientation gtk_progress_bar_get_orientation
                                                        (GtkProgressBar *pbar);

Retrieves the current progress bar orientation.

pbar : a GtkProgressBar
Returns : orientation of the progress bar

gtk_progress_bar_get_ellipsize ()

PangoEllipsizeMode  gtk_progress_bar_get_ellipsize      (GtkProgressBar *pbar);

Returns the ellipsizing position of the progressbar. See gtk_progress_bar_set_ellipsize().

pbar : a GtkProgressBar
Returns : PangoEllipsizeMode

Since 2.6

gtk_progress_bar_new_with_adjustment ()

GtkWidget*          gtk_progress_bar_new_with_adjustment
                                                        (GtkAdjustment *adjustment);

Warning

gtk_progress_bar_new_with_adjustment is deprecated and should not be used in newly-written code.

Creates a new GtkProgressBar with an associated GtkAdjustment.

adjustment : a GtkAdjustment.
Returns : a GtkProgressBar.

gtk_progress_bar_set_bar_style ()

void                gtk_progress_bar_set_bar_style      (GtkProgressBar *pbar,
                                                         GtkProgressBarStyle style);

Warning

gtk_progress_bar_set_bar_style is deprecated and should not be used in newly-written code.

Sets the style of the GtkProgressBar. The default style is GTK_PROGRESS_CONTINUOUS.

pbar : a GtkProgressBar.
style : a GtkProgressBarStyle value indicating the desired style.

enum GtkProgressBarStyle

typedef enum
{
  GTK_PROGRESS_CONTINUOUS,
  GTK_PROGRESS_DISCRETE
} GtkProgressBarStyle;

An enumeration representing the styles for drawing the progress bar.

GTK_PROGRESS_CONTINUOUS The progress bar grows in a smooth, continuous manner.
GTK_PROGRESS_DISCRETE The progress bar grows in discrete, visible blocks.

gtk_progress_bar_set_discrete_blocks ()

void                gtk_progress_bar_set_discrete_blocks
                                                        (GtkProgressBar *pbar,
                                                         guint blocks);

Warning

gtk_progress_bar_set_discrete_blocks is deprecated and should not be used in newly-written code.

Sets the number of blocks that the progress bar is divided into when the style is GTK_PROGRESS_DISCRETE.

pbar : a GtkProgressBar.
blocks : number of individual blocks making up the bar.

gtk_progress_bar_set_activity_step ()

void                gtk_progress_bar_set_activity_step  (GtkProgressBar *pbar,
                                                         guint step);

Warning

gtk_progress_bar_set_activity_step is deprecated and should not be used in newly-written code.

Sets the step value used when the progress bar is in activity mode. The step is the amount by which the progress is incremented each iteration.

pbar : a GtkProgressBar.
step : the amount which the progress is incremented in activity mode.

gtk_progress_bar_set_activity_blocks ()

void                gtk_progress_bar_set_activity_blocks
                                                        (GtkProgressBar *pbar,
                                                         guint blocks);

Warning

gtk_progress_bar_set_activity_blocks is deprecated and should not be used in newly-written code.

Sets the number of blocks used when the progress bar is in activity mode. Larger numbers make the visible block smaller.

pbar : a GtkProgressBar.
blocks : number of blocks which can fit within the progress bar area.

gtk_progress_bar_update ()

void                gtk_progress_bar_update             (GtkProgressBar *pbar,
                                                         gdouble percentage);

Warning

gtk_progress_bar_update is deprecated and should not be used in newly-written code.

This function is deprecated. Please use gtk_progress_set_value() or gtk_progress_set_percentage() instead.

pbar : a GtkProgressBar.
percentage : the new percent complete value.

Property Details

The "activity-blocks" property

  "activity-blocks"          guint                 : Read / Write

The number of blocks which can fit in the progress bar area in activity mode (Deprecated).

Allowed values: >= 2

Default value: 5

The "activity-step" property

  "activity-step"            guint                 : Read / Write

The increment used for each iteration in activity mode (Deprecated).

Default value: 3

The "adjustment" property

  "adjustment"               GtkAdjustment         : Read / Write

The GtkAdjustment connected to the progress bar (Deprecated).

The "bar-style" property

  "bar-style"                GtkProgressBarStyle   : Read / Write

Specifies the visual style of the bar in percentage mode (Deprecated).

Default value: GTK_PROGRESS_CONTINUOUS

The "discrete-blocks" property

  "discrete-blocks"          guint                 : Read / Write

The number of discrete blocks in a progress bar (when shown in the discrete style).

Allowed values: >= 2

Default value: 10

The "ellipsize" property

  "ellipsize"                PangoEllipsizeMode    : Read / Write

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().

Default value: PANGO_ELLIPSIZE_NONE

Since 2.6

The "fraction" property

  "fraction"                 gdouble               : Read / Write

The fraction of total work that has been completed.

Allowed values: [0,1]

Default value: 0

The "orientation" property

  "orientation"              GtkProgressBarOrientation  : Read / Write

Orientation and growth direction of the progress bar.

Default value: GTK_PROGRESS_LEFT_TO_RIGHT

The "pulse-step" property

  "pulse-step"               gdouble               : Read / Write

The fraction of total progress to move the bouncing block when pulsed.

Allowed values: [0,1]

Default value: 0.1

The "text" property

  "text"                     gchararray            : Read / Write

Text to be displayed in the progress bar.

Default value: "%P %%"