Synopsis#include <gtk/gtk.h> GtkRange; gdouble gtk_range_get_fill_level (GtkRange *range); gboolean gtk_range_get_restrict_to_fill_level (GtkRange *range); gboolean gtk_range_get_show_fill_level (GtkRange *range); void gtk_range_set_fill_level (GtkRange *range, gdouble fill_level); void gtk_range_set_restrict_to_fill_level (GtkRange *range, gboolean restrict_to_fill_level); void gtk_range_set_show_fill_level (GtkRange *range, gboolean show_fill_level); GtkAdjustment* gtk_range_get_adjustment (GtkRange *range); void gtk_range_set_update_policy (GtkRange *range, GtkUpdateType policy); void gtk_range_set_adjustment (GtkRange *range, GtkAdjustment *adjustment); gboolean gtk_range_get_inverted (GtkRange *range); void gtk_range_set_inverted (GtkRange *range, gboolean setting); GtkUpdateType gtk_range_get_update_policy (GtkRange *range); gdouble gtk_range_get_value (GtkRange *range); void gtk_range_set_increments (GtkRange *range, gdouble step, gdouble page); void gtk_range_set_range (GtkRange *range, gdouble min, gdouble max); void gtk_range_set_value (GtkRange *range, gdouble value); enum GtkSensitivityType; void gtk_range_set_lower_stepper_sensitivity (GtkRange *range, GtkSensitivityType sensitivity); GtkSensitivityType gtk_range_get_lower_stepper_sensitivity (GtkRange *range); void gtk_range_set_upper_stepper_sensitivity (GtkRange *range, GtkSensitivityType sensitivity); GtkSensitivityType gtk_range_get_upper_stepper_sensitivity (GtkRange *range); Object HierarchyGObject +----GInitiallyUnowned +----GtkObject +----GtkWidget +----GtkRange +----GtkScale +----GtkScrollbar Properties"adjustment" GtkAdjustment* : Read / Write / Construct "fill-level" gdouble : Read / Write "inverted" gboolean : Read / Write "lower-stepper-sensitivity" GtkSensitivityType : Read / Write "restrict-to-fill-level" gboolean : Read / Write "show-fill-level" gboolean : Read / Write "update-policy" GtkUpdateType : Read / Write "upper-stepper-sensitivity" GtkSensitivityType : Read / Write Style Properties"activate-slider" gboolean : Read "arrow-displacement-x" gint : Read "arrow-displacement-y" gint : Read "arrow-scaling" gfloat : Read "slider-width" gint : Read "stepper-size" gint : Read "stepper-spacing" gint : Read "trough-border" gint : Read "trough-side-details" gboolean : Read "trough-under-steppers" gboolean : Read Signals"adjust-bounds" : Run Last "change-value" : Run Last "move-slider" : Run Last / Action "value-changed" : Run Last DescriptionGtkRange is the common base class for widgets which visualize an adjustment, e.g scales or scrollbars.
Apart from signals for monitoring the parameters of the adjustment,
GtkRange provides properties and methods for influencing the sensitivity
of the "steppers". It also provides properties and methods for setting a
"fill level" on range widgets. See Detailsgtk_range_get_fill_level ()gdouble gtk_range_get_fill_level (GtkRange *range); Gets the current position of the fill level indicator.
Since 2.12 gtk_range_get_restrict_to_fill_level ()gboolean gtk_range_get_restrict_to_fill_level (GtkRange *range); Gets whether the range is restricted to the fill level.
Since 2.12 gtk_range_get_show_fill_level ()gboolean gtk_range_get_show_fill_level (GtkRange *range); Gets whether the range displays the fill level graphically.
Since 2.12 gtk_range_set_fill_level ()void gtk_range_set_fill_level (GtkRange *range, gdouble fill_level); Set the new position of the fill level indicator. The "fill level" is probably best described by its most prominent use case, which is an indicator for the amount of pre-buffering in a streaming media player. In that use case, the value of the range would indicate the current play position, and the fill level would be the position up to which the file/stream has been downloaded.
This amount of prebuffering can be displayed on the range's trough
and is themeable separately from the trough. To enable fill level
display, use
Additionally, it's possible to restrict the range's slider position
to values which are smaller than the fill level. This is controller
by
Since 2.12 gtk_range_set_restrict_to_fill_level ()void gtk_range_set_restrict_to_fill_level (GtkRange *range, gboolean restrict_to_fill_level);
Sets whether the slider is restricted to the fill level. See
Since 2.12 gtk_range_set_show_fill_level ()void gtk_range_set_show_fill_level (GtkRange *range, gboolean show_fill_level);
Sets whether a graphical fill level is show on the trough. See
Since 2.12 gtk_range_get_adjustment ()GtkAdjustment* gtk_range_get_adjustment (GtkRange *range);
Get the GtkAdjustment which is the "model" object for GtkRange.
See
gtk_range_set_update_policy ()void gtk_range_set_update_policy (GtkRange *range, GtkUpdateType policy); Sets the update policy for the range. GTK_UPDATE_CONTINUOUS means that anytime the range slider is moved, the range value will change and the value_changed signal will be emitted. GTK_UPDATE_DELAYED means that the value will be updated after a brief timeout where no slider motion occurs, so updates are spaced by a short time rather than continuous. GTK_UPDATE_DISCONTINUOUS means that the value will only be updated when the user releases the button and ends the slider drag operation.
gtk_range_set_adjustment ()void gtk_range_set_adjustment (GtkRange *range, GtkAdjustment *adjustment); Sets the adjustment to be used as the "model" object for this range widget. The adjustment indicates the current range value, the minimum and maximum range values, the step/page increments used for keybindings and scrolling, and the page size. The page size is normally 0 for GtkScale and nonzero for GtkScrollbar, and indicates the size of the visible area of the widget being scrolled. The page size affects the size of the scrollbar slider.
gtk_range_get_inverted ()gboolean gtk_range_get_inverted (GtkRange *range);
Gets the value set by
gtk_range_set_inverted ()void gtk_range_set_inverted (GtkRange *range, gboolean setting); Ranges normally move from lower to higher values as the slider moves from top to bottom or left to right. Inverted ranges have higher values at the top or on the right rather than on the bottom or left.
gtk_range_get_update_policy ()GtkUpdateType gtk_range_get_update_policy (GtkRange *range);
Gets the update policy of
gtk_range_get_value ()gdouble gtk_range_get_value (GtkRange *range); Gets the current value of the range.
gtk_range_set_increments ()void gtk_range_set_increments (GtkRange *range, gdouble step, gdouble page); Sets the step and page sizes for the range. The step size is used when the user clicks the GtkScrollbar arrows or moves GtkScale via arrow keys. The page size is used for example when moving via Page Up or Page Down keys.
gtk_range_set_range ()void gtk_range_set_range (GtkRange *range, gdouble min, gdouble max);
Sets the allowable values in the GtkRange, and clamps the range
value to be between
gtk_range_set_value ()void gtk_range_set_value (GtkRange *range, gdouble value); Sets the current value of the range; if the value is outside the minimum or maximum range values, it will be clamped to fit inside them. The range emits the "value-changed" signal if the value changes.
enum GtkSensitivityTypetypedef enum { GTK_SENSITIVITY_AUTO, GTK_SENSITIVITY_ON, GTK_SENSITIVITY_OFF } GtkSensitivityType; Determines how GTK+ handles the sensitivity of stepper arrows at the end of range widgets. gtk_range_set_lower_stepper_sensitivity ()void gtk_range_set_lower_stepper_sensitivity (GtkRange *range, GtkSensitivityType sensitivity); Sets the sensitivity policy for the stepper that points to the 'lower' end of the GtkRange's adjustment.
Since 2.10 gtk_range_get_lower_stepper_sensitivity ()GtkSensitivityType gtk_range_get_lower_stepper_sensitivity (GtkRange *range); Gets the sensitivity policy for the stepper that points to the 'lower' end of the GtkRange's adjustment.
Since 2.10 gtk_range_set_upper_stepper_sensitivity ()void gtk_range_set_upper_stepper_sensitivity (GtkRange *range, GtkSensitivityType sensitivity); Sets the sensitivity policy for the stepper that points to the 'upper' end of the GtkRange's adjustment.
Since 2.10 gtk_range_get_upper_stepper_sensitivity ()GtkSensitivityType gtk_range_get_upper_stepper_sensitivity (GtkRange *range); Gets the sensitivity policy for the stepper that points to the 'upper' end of the GtkRange's adjustment.
Since 2.10 Property DetailsThe
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the object which received the signal. |
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user data set when the signal handler was connected. |
"change-value"
signalgboolean user_function (GtkRange *range, GtkScrollType scroll, gdouble value, gpointer user_data) : Run Last
The ::change-value signal is emitted when a scroll action is
performed on a range. It allows an application to determine the
type of scroll event that occurred and the resultant new value.
The application can handle the event itself and return TRUE
to
prevent further processing. Or, by returning FALSE
, it can pass
the event to other handlers until the default GTK+ handler is
reached.
The value parameter is unrounded. An application that overrides
the ::change-value signal is responsible for clamping the value to
the desired number of decimal digits; the default GTK+ handler
clamps the value based on range->round_digits
.
It is not possible to use delayed update policies in an overridden ::change-value handler.
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the range that received the signal |
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the type of scroll action that was performed |
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the new value resulting from the scroll action |
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TRUE to prevent other handlers from being invoked for the
signal, FALSE to propagate the signal further
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user data set when the signal handler was connected. |
Since 2.6
"move-slider"
signalvoid user_function (GtkRange *range, GtkScrollType step, gpointer user_data) : Run Last / Action
Virtual function that moves the slider. Used for keybindings.
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the GtkRange |
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how to move the slider |
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user data set when the signal handler was connected. |