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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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/* See LICENSE file for license and copyright information */
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#ifndef ZATHURA_ADJUSTMENT_H
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#define ZATHURA_ADJUSTMENT_H
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#include <gtk/gtk.h>
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/* Clone a GtkAdjustment
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*
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* Creates a new adjustment with the same value, lower and upper bounds, step
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* and page increments and page_size as the original adjustment.
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*
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* @param adjustment Adjustment instance to be cloned
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* @return Pointer to the new adjustment
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*/
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GtkAdjustment* zathura_adjustment_clone(GtkAdjustment* adjustment);
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/**
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* Set the adjustment value while enforcing its limits
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*
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* @param adjustment Adjustment instance
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* @param value Adjustment value
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*/
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void zathura_adjustment_set_value(GtkAdjustment* adjustment, gdouble value);
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/**
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* Compute the adjustment ratio
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*
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* That is, the ratio between the length from the lower bound to the middle of
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* the slider, and the total length of the scrollbar.
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*
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* @param adjustment Scrollbar adjustment
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* @return Adjustment ratio
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*/
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gdouble zathura_adjustment_get_ratio(GtkAdjustment* adjustment);
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/**
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* Set the adjustment value from ratio
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*
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* The ratio is usually obtained from a previous call to
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* zathura_adjustment_get_ratio().
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*
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* @param adjustment Adjustment instance
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* @param ratio Ratio from which the adjustment value will be set
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*/
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void zathura_adjustment_set_value_from_ratio(GtkAdjustment* adjustment,
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gdouble ratio);
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#endif /* ZATHURA_ADJUSTMENT_H */
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