Branch: Tag:

2005-07-28

2005-07-28 15:26:09 by Martin Nilsson <mani@lysator.liu.se>

GTK2

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1: + class GTK2.Adjustment; + inherit GTK2.Data;    -  + //! The GTK2.Adjustment object represents a value which has an associated + //! lower and upper bound, together with step and page increments, and + //! a page size. It is used within several GTK2+ widgets, including + //! GtkSpinButton, GtkViewport, and GtkRange (which is a base class for + //! GtkHScrollbar, GtkVScrollbar, GtkHScale, and GtkVScale). + //! <p> + //! The GtkAdjustment object does not update the value itself. Instead + //! it is left up to the owner of the GtkAdjustment to control the + //! value. + //! </p><p> + //! The owner of the GtkAdjustment typically calls the value_changed() + //! and changed() functions after changing the value or its + //! bounds. This results in the emission of the "value_changed" or + //! "changed" signal respectively. + //! </p> +  + //! Properties: + //! float lower + //! float page-increment + //! float page-size + //! float step-increment + //! float upper + //! float value +  + signal changed; + //! The adjustment changed in some way + signal value_changed; + //! The value changed +  + void create(?float value, +  ?float lower, ?float upper, +  ?float step_increment, ?float page_increment, +  ?float page_size ); + //! The value argument is the initial value you want to give to the + //! adjustment, usually corresponding to the topmost or leftmost + //! position of an adjustable widget. The lower argument specifies the + //! lowest value which the adjustment can hold. The step_increment + //! argument specifies the "smaller" of the two increments by which + //! the user can change the value, while the page_increment is the + //! "larger" one. The page_size argument usually corresponds somehow + //! to the visible area of a panning widget. The upper argument is + //! used to represent the bottom most or right most coordinate in a + //! panning widget's child. Therefore it is not always the largest + //! number that value can take, since the page_size of such widgets is + //! usually non-zero. + //! + //! All values are optional, they default to 0.0. + //! For most widgets the unit is pixels. +  + float get_value(); + //! Gets the current value. +  + void set_value(float to); + //! Sets the value. The value is clamped to lie between lower and upper. + //! <p> + //! Note that for adjustments which are used in a W(Scrollbar), the effective + //! range of allowed values goes from lower to upper-page_size. +  + void clamp_page(float lower, float upper); + //! Updates the W(Adjustment) value to ensure that the range between lower and + //! upper is in the current page (i.e. between value and value+page_size). If + //! the range is larger than the page size, then only the start of it will be + //! in the current page. A "changed" signal will be emitted if the value is + //! changed. +  + void changed(); + //! Emites a "changed" signal. +  + void value_changed(); + //! Emits a "value-changed" signal.   Newline at end of file added.