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authormarha <marha@users.sourceforge.net>2011-03-25 15:37:13 +0000
committermarha <marha@users.sourceforge.net>2011-03-25 15:37:13 +0000
commit41a502478a2972358dec934d82ee401c61a5cd36 (patch)
tree3fda8100e6da9b4a2863789e393016a750502067 /libXaw/spec/Viewport
parent81aeaf653a832c4054d9a40b1cc796911521a739 (diff)
parent272e57235cd60a2e65ac8258d96a02eb3939b687 (diff)
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-.\" $Xorg: Viewport,v 1.3 2000/08/17 19:42:29 cpqbld Exp $
-.NH 2
-Viewport Widget
-.LP
-.XS
- Viewport Widget
-.XE
-.IN "Viewport widget" "" "@DEF@"
-.Ds 0
-.TA 2.0i
-.ta 2.0i
-.sp
-Application Header file <X11/Xaw/Viewport.h>
-.IN "Viewport.h" ""
-Class Header file <X11/Xaw/ViewportP.h>
-.IN "ViewportP.h" ""
-Class viewportWidgetClass
-.IN "viewportWidgetClass" ""
-Class Name Viewport
-.IN "Viewport widget" "class name"
-Superclass Form
-.sp
-.De
-.LP
-The Viewport widget consists of a frame window, one or two Scrollbars,
-and an inner window. The size of the frame window is determined by the
-viewing size of the data that is to be displayed and the dimensions to
-which the Viewport is created. The inner window is the full size of the
-data that is to be displayed and is clipped by the frame window. The
-Viewport widget controls the scrolling of the data directly. No
-application callbacks are required for scrolling.
-.LP
-When the geometry of the frame window is equal in size to the inner
-window, or when the data does not require scrolling, the Viewport widget
-automatically removes any scrollbars. The \fBforceBars\fP option causes
-the Viewport widget to display all scrollbars permanently.
-.NH 3
-Resources
-.LP
-When creating a Viewport widget instance, the following resources are
-retrieved from the argument list or the resource database:
-.LP
-.IN "Viewport widget" "resources"
-.TS H
-expand;
-lw(1i) lw(1i) lw(1i) lw(.5i) lw(2i).
-_
-.sp 3p
-.TB
-Name Class Type Notes Default Value
-.sp 3p
-_
-.TH
-.R
-.sp 3p
-accelerators Accelerators AcceleratorTable NULL
-allowHoriz Boolean Boolean False
-allowVert Boolean Boolean False
-ancestorSensitive AncestorSensitive Boolean D True
-background Background Pixel XtDefaultBackground
-backgroundPixmap Pixmap Pixmap XtUnspecifiedPixmap
-borderColor BorderColor Pixel XtDefaultForeground
-borderPixmap Pixmap Pixmap XtUnspecifiedPixmap
-borderWidth BorderWidth Dimension 1
-children ReadOnly WidgetList R NULL
-colormap Colormap Colormap Parent's Colormap
-depth Depth int C Parent's Depth
-destroyCallback Callback XtCallbackList NULL
-forceBars Boolean Boolean False
-height Height Dimension height of the child
-mappedWhenManaged MappedWhenManaged Boolean True
-numChildren ReadOnly Cardinal R 0
-reportCallback ReportCallback XtCallbackList NULL
-screen Screen Screen R Parent's Screen
-sensitive Sensitive Boolean True
-translations Translations TranslationTable NULL
-useBottom Boolean Boolean False
-useRight Boolean Boolean False
-width Width Dimension width of the child
-x Position Position 0
-y Position Position 0
-.sp 3p
-_
-.TE
-.Ac
-.IP \fBallowHoriz\fP 1.5i
-.br
-.ns
-.IP \fBallowVert\fP 1.5i
-If these resources are \fBFalse\fP then the Viewport will never create
-a scrollbar in this direction. If it is \fBTrue\fP then the scrollbar will
-only appear when it is needed, unless \fBforceBars\fP is \fBTrue\fP.
-.As
-.Bg
-.Gp
-.Bc
-.Bp
-.Bw
-.Ch
-.Cm
-.Dp
-.Dc
-.IP \fBforceBars\fP 1.5i
-When \fBTrue\fP the scrollbars that have been \fIallowed\fP will always be
-visible on the screen. If \fBFalse\fP the scrollbars will be visible only
-when the inner window is larger than the frame.
-.Hw
-.Mm
-.Nc
-.IP \fBreportCallback\fP 1.5i
-These callbacks will be executed whenever the Viewport adjusts the viewed
-area of the child. The call_data parameter is a pointer to an XawPannerReport
-structure.
-.Sc
-.Se
-.Tr
-.IP \fBuseBottom\fP 1.5i
-.br
-.ns
-.IP \fBuseRight\fP 1.5i
-By default the scrollbars appear on the left and top of the screen.
-These resources allow the vertical scrollbar to be placed on the right
-edge of the Viewport, and the horizontal scrollbar on the bottom edge of
-the Viewport.
-.Xy
-.NH 3
-Layout Semantics
-.LP
-.IN "Viewport widget" "layout semantics"
-The Viewport widget manages a single child widget. When the size of the
-child is larger than the size of the Viewport, the user can interactively
-move the child within the Viewport by repositioning the scrollbars.
-.LP
-The default size of the Viewport before it is realized is the width and/or
-height of the child. After it is realized, the Viewport will allow its
-child to grow vertically or horizontally if \fBallowVert\fP or
-\fBallowHoriz\fP are set, respectively. If the corresponding vertical
-or horizontal scrollbar is not enabled, the Viewport will propagate the
-geometry request to its own parent and the child will be allowed to change
-size only if the Viewport's parent allows it. Regardless of whether or not
-scrollbars are enabled in the corresponding direction, if the child requests
-a new size smaller than the Viewport size, the change will be allowed only
-if the parent of the Viewport allows the Viewport to shrink to the
-appropriate dimension.
-.LP
-The scrollbar children of the Viewport are named \fBhorizontal\fP and
-\fBvertical\fP. By using these names the programmer can specify resources
-for the individual scrollbars. \fBXtSetValues\fP can be used to modify
-the resources dynamically once the widget ID has been obtained with
-\fBXtNameToWidget\fP.
-.IN "XtNameToWidget" ""
-.NT
-Although the Viewport is a Subclass of the Form, no resources for the Form
-may be supplied for any of the children of the Viewport. These constraints
-are managed internally and are not meant for public consumption.
-.NE