GTK+ Reference Manual
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GtkProgressBar

Name

GtkProgressBar -- a widget which indicates progress visually.

Synopsis


#include <gtk/gtk.h>


struct      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);
enum        GtkProgressBarOrientation;
G_CONST_RETURN 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);
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
   +----GtkObject
         +----GtkWidget
               +----GtkProgress
                     +----GtkProgressBar

Properties


  "fraction"             gdouble              : Read / Write
  "pulse-step"           gdouble              : Read / Write
  "orientation"          GtkProgressBarOrientation : Read / Write
  "text"                 gchararray           : Read / Write
  "adjustment"           GtkAdjustment        : Read / Write
  "bar-style"            GtkProgressBarStyle  : Read / Write
  "activity-step"        guint                : Read / Write
  "activity-blocks"      guint                : Read / Write
  "discrete-blocks"      guint                : 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 9 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(). These have been grouped at the beginning of this section, followed by a large chunk of deprecated 1.2 compatibility functions.

Details

struct GtkProgressBar

struct 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

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

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_RIGHTA horizontal progress bar growing from left to right.
GTK_PROGRESS_RIGHT_TO_LEFTA horizontal progress bar growing from right to left.
GTK_PROGRESS_BOTTOM_TO_TOPA vertical progress bar growing from bottom to top.
GTK_PROGRESS_TOP_TO_BOTTOMA vertical progress bar growing from top to bottom.

gtk_progress_bar_get_text ()

G_CONST_RETURN 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; don't free the string

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_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_CONTINUOUSThe progress bar grows in a smooth, continuous manner.
GTK_PROGRESS_DISCRETEThe 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.

Properties

"fraction" (gdouble : Read / Write)

The fraction of total work that has been completed

"pulse-step" (gdouble : Read / Write)

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

"orientation" (GtkProgressBarOrientation : Read / Write)

Orientation and growth direction of the progress bar

"text" (gchararray : Read / Write)

Text to be displayed in the progress bar

"adjustment" (GtkAdjustment : Read / Write)

The GtkAdjustment connected to the progress bar (Deprecated)

"bar-style" (GtkProgressBarStyle : Read / Write)

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

"activity-step" (guint : Read / Write)

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

"activity-blocks" (guint : Read / Write)

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

"discrete-blocks" (guint : Read / Write)

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



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