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Scrollbar: Tweak intro docs a bit

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Explain where the adjustment comes from, clarify some of the wording
about how its fields influence the scrollbar, and also note that the
steppers may not be present, since they aren’t in our default themes.
This commit is contained in:
Daniel Boles 2017-03-20 23:54:57 +00:00
parent 93d68270c4
commit 369377369f
1 changed files with 9 additions and 10 deletions
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19
gtk/gtkscrollbar.c
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@ -43,16 +43,15 @@
* The #GtkScrollbar widget is a horizontal or vertical scrollbar,
* depending on the value of the #GtkOrientable:orientation property.
*
* The position of the thumb in a scrollbar is controlled by the scroll
* adjustments. See #GtkAdjustment for the fields in an adjustment - for
* #GtkScrollbar, the #GtkAdjustment:value field represents the position
* of the scrollbar, which must be between the #GtkAdjustment:lower field
* and #GtkAdjustment:upper - #GtkAdjustment:page-size. The
* #GtkAdjustment:page-size field represents the size of the visible
* scrollable area. The #GtkAdjustment:step-increment and
* #GtkAdjustment:page-increment fields are properties when the user asks to
* step down (using the small stepper arrows) or page down (using for
* example the `Page Down` key).
* Its position and movement are controlled by the adjustment that is passed to
* or created by gtk_scrollbar_new(). See #GtkAdjustment for more details. The
* #GtkAdjustment:value field sets the position of the thumb and must be between
* #GtkAdjustment:lower and #GtkAdjustment:upper - #GtkAdjustment:page-size. The
* #GtkAdjustment:page-size represents the size of the visible scrollable area.
* The fields #GtkAdjustment:step-increment and #GtkAdjustment:page-increment
* fields are added or subtracted to the #GtkAdjustment:value when the user asks
* to move by a step (using e.g. the cursor arrow keys or, if present, the
* stepper buttons) or by a page (using e.g. the Page Down/Up keys).
*
* # CSS nodes
*