322 lines
11 KiB
C
322 lines
11 KiB
C
|
/*
|
||
|
|
* Copyright 1989 O'Reilly and Associates, Inc.
|
||
|
|
|
||
|
|
The X Consortium, and any party obtaining a copy of these files from
|
||
|
|
the X Consortium, directly or indirectly, is granted, free of charge, a
|
||
|
|
full and unrestricted irrevocable, world-wide, paid up, royalty-free,
|
||
|
|
nonexclusive right and license to deal in this software and
|
||
|
|
documentation files (the "Software"), including without limitation the
|
||
|
|
rights to use, copy, modify, merge, publish, distribute, sublicense,
|
||
|
|
and/or sell copies of the Software, and to permit persons who receive
|
||
|
|
copies from any such party to do so. This license includes without
|
||
|
|
limitation a license to do the foregoing actions under any patents of
|
||
|
|
the party supplying this software to the X Consortium.
|
||
|
|
|
||
|
|
$Id: ScrollBox.c,v 1.15 2008/07/14 04:24:52 wmcbrine Exp $
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* ScrollBox.c - scrollBox composite widget */
|
||
|
|
|
||
|
|
#include <X11/IntrinsicP.h>
|
||
|
|
#include <X11/StringDefs.h>
|
||
|
|
#include <X11/Shell.h>
|
||
|
|
|
||
|
|
#include "x11/ScrollBoxP.h"
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
#define INITIAL_WIDTH 300
|
||
|
|
#define INITIAL_HEIGHT 300
|
||
|
|
|
||
|
|
/************************************************************************
|
||
|
|
* *
|
||
|
|
* scrollBox Resources *
|
||
|
|
* *
|
||
|
|
************************************************************************/
|
||
|
|
|
||
|
|
static XtResource resources[] =
|
||
|
|
{
|
||
|
|
{ XtNhSpace, XtCHSpace, XtRDimension, sizeof(Dimension),
|
||
|
|
XtOffset(ScrollBoxWidget, scrollBox.h_space),
|
||
|
|
XtRImmediate, (XtPointer)4 },
|
||
|
|
{ XtNvSpace, XtCVSpace, XtRDimension, sizeof(Dimension),
|
||
|
|
XtOffset(ScrollBoxWidget, scrollBox.v_space),
|
||
|
|
XtRImmediate, (XtPointer)4 },
|
||
|
|
{ XtNheightInc, XtCHeightInc, XtRDimension, sizeof(Dimension),
|
||
|
|
XtOffset(ScrollBoxWidget, scrollBox.increment_height),
|
||
|
|
XtRImmediate, (XtPointer)13 },
|
||
|
|
{ XtNwidthInc, XtCWidthInc, XtRDimension, sizeof(Dimension),
|
||
|
|
XtOffset(ScrollBoxWidget, scrollBox.increment_width),
|
||
|
|
XtRImmediate, (XtPointer)7 },
|
||
|
|
};
|
||
|
|
|
||
|
|
/************************************************************************
|
||
|
|
* *
|
||
|
|
* Full class record constant *
|
||
|
|
* *
|
||
|
|
************************************************************************/
|
||
|
|
|
||
|
|
static void Initialize(Widget, Widget, ArgList, Cardinal *);
|
||
|
|
static void Resize(Widget);
|
||
|
|
static Boolean SetValues(Widget, Widget, Widget, ArgList, Cardinal *);
|
||
|
|
static void ChangeManaged(Widget);
|
||
|
|
static XtGeometryResult QueryGeometry(Widget, XtWidgetGeometry *,
|
||
|
|
XtWidgetGeometry *);
|
||
|
|
static XtGeometryResult GeometryManager(Widget, XtWidgetGeometry *,
|
||
|
|
XtWidgetGeometry *);
|
||
|
|
static void RefigureLocations(Widget);
|
||
|
|
|
||
|
|
ScrollBoxClassRec scrollBoxClassRec = {
|
||
|
|
{
|
||
|
|
/* core_class fields */
|
||
|
|
/* superclass */ (WidgetClass) &compositeClassRec,
|
||
|
|
/* class_name */ "scrollBox",
|
||
|
|
/* widget_size */ sizeof(ScrollBoxRec),
|
||
|
|
/* class_initialize */ NULL,
|
||
|
|
/* class_part_init */ NULL,
|
||
|
|
/* class_inited */ FALSE,
|
||
|
|
/* initialize */ Initialize,
|
||
|
|
/* initialize_hook */ NULL,
|
||
|
|
/* realize */ XtInheritRealize,
|
||
|
|
/* actions */ NULL,
|
||
|
|
/* num_actions */ 0,
|
||
|
|
/* resources */ resources,
|
||
|
|
/* num_resources */ XtNumber(resources),
|
||
|
|
/* xrm_class */ NULLQUARK,
|
||
|
|
/* compress_motion */ TRUE,
|
||
|
|
/* compress_exposure */ TRUE,
|
||
|
|
/* compress_enterleave */ TRUE,
|
||
|
|
/* visible_interest */ FALSE,
|
||
|
|
/* destroy */ NULL,
|
||
|
|
/* resize */ Resize,
|
||
|
|
/* expose */ NULL,
|
||
|
|
/* set_values */ SetValues,
|
||
|
|
/* set_values_hook */ NULL,
|
||
|
|
/* set_values_almost */ XtInheritSetValuesAlmost,
|
||
|
|
/* get_values_hook */ NULL,
|
||
|
|
/* accept_focus */ NULL,
|
||
|
|
/* version */ XtVersion,
|
||
|
|
/* callback_private */ NULL,
|
||
|
|
/* tm_table */ NULL,
|
||
|
|
/* query_geometry */ QueryGeometry,
|
||
|
|
/* display_accelerator */ XtInheritDisplayAccelerator,
|
||
|
|
/* extension */ NULL
|
||
|
|
},{
|
||
|
|
/* composite_class fields */
|
||
|
|
/* geometry_manager */ GeometryManager,
|
||
|
|
/* change_managed */ ChangeManaged,
|
||
|
|
/* insert_child */ XtInheritInsertChild,
|
||
|
|
/* delete_child */ XtInheritDeleteChild,
|
||
|
|
/* extension */ NULL
|
||
|
|
},{
|
||
|
|
/* scrollBox class fields */
|
||
|
|
/* empty */ 0,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
WidgetClass scrollBoxWidgetClass = (WidgetClass)&scrollBoxClassRec;
|
||
|
|
|
||
|
|
|
||
|
|
/************************************************************************
|
||
|
|
* *
|
||
|
|
* Private Routines *
|
||
|
|
* *
|
||
|
|
************************************************************************/
|
||
|
|
|
||
|
|
/* Do a layout, either actually assigning positions, or just
|
||
|
|
calculating size. */
|
||
|
|
|
||
|
|
static void DoLayout(Widget w, Boolean doit)
|
||
|
|
{
|
||
|
|
ScrollBoxWidget sbw = (ScrollBoxWidget)w;
|
||
|
|
Widget wmain, vscroll, hscroll, child;
|
||
|
|
Dimension mw, mh; /* main window */
|
||
|
|
Dimension vh; /* vertical scrollbar length (height) */
|
||
|
|
Dimension hw; /* horizontal scrollbar length (width) */
|
||
|
|
Position vx;
|
||
|
|
Position hy;
|
||
|
|
Cardinal i;
|
||
|
|
|
||
|
|
if (sbw->composite.num_children != 3)
|
||
|
|
XtAppError(XtWidgetToApplicationContext(w),
|
||
|
|
"ScrollBox: must manage exactly three widgets.");
|
||
|
|
|
||
|
|
for (i = 0; i < sbw->composite.num_children; i++)
|
||
|
|
{
|
||
|
|
child = sbw->composite.children[i];
|
||
|
|
|
||
|
|
if (!XtIsManaged(child))
|
||
|
|
XtAppError(XtWidgetToApplicationContext(w),
|
||
|
|
"ScrollBox: all three widgets must be managed.");
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Child one is the main window, two is the vertical scrollbar,
|
||
|
|
and three is the horizontal scrollbar. */
|
||
|
|
|
||
|
|
wmain = sbw->composite.children[0];
|
||
|
|
vscroll = sbw->composite.children[1];
|
||
|
|
hscroll = sbw->composite.children[2];
|
||
|
|
|
||
|
|
/* Size all three widgets so that space is fully utilized. */
|
||
|
|
|
||
|
|
mw = sbw->core.width - (2 * sbw->scrollBox.h_space) -
|
||
|
|
vscroll->core.width - (2 * vscroll->core.border_width) -
|
||
|
|
(2 * wmain->core.border_width);
|
||
|
|
|
||
|
|
mh = sbw->core.height - (2 * sbw->scrollBox.v_space) -
|
||
|
|
hscroll->core.height - (2 * hscroll->core.border_width) -
|
||
|
|
(2 * wmain->core.border_width);
|
||
|
|
|
||
|
|
/* Force the main window to be sized to the appropriate increment. */
|
||
|
|
|
||
|
|
mw = (mw / sbw->scrollBox.increment_width) *
|
||
|
|
sbw->scrollBox.increment_width;
|
||
|
|
|
||
|
|
mh = ((mh / sbw->scrollBox.increment_height) *
|
||
|
|
sbw->scrollBox.increment_height) +
|
||
|
|
sbw->scrollBox.increment_height;
|
||
|
|
|
||
|
|
vx = wmain->core.x + mw + sbw->scrollBox.h_space +
|
||
|
|
wmain->core.border_width + vscroll->core.border_width;
|
||
|
|
|
||
|
|
hy = wmain->core.y + mh + sbw->scrollBox.v_space +
|
||
|
|
wmain->core.border_width + hscroll->core.border_width;
|
||
|
|
|
||
|
|
vh = mh; /* scrollbars are always same length as main window */
|
||
|
|
hw = mw;
|
||
|
|
|
||
|
|
if (doit)
|
||
|
|
{
|
||
|
|
XtResizeWidget(wmain, mw, mh, 1);
|
||
|
|
|
||
|
|
XtResizeWidget(vscroll, vscroll->core.width, vh, 1);
|
||
|
|
XtMoveWidget(vscroll, vx, vscroll->core.y);
|
||
|
|
|
||
|
|
XtResizeWidget(hscroll, hw, hscroll->core.height, 1);
|
||
|
|
XtMoveWidget(hscroll, hscroll->core.x, hy);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static XtGeometryResult GeometryManager(Widget w, XtWidgetGeometry *request,
|
||
|
|
XtWidgetGeometry *reply)
|
||
|
|
{
|
||
|
|
XtWidgetGeometry allowed;
|
||
|
|
|
||
|
|
if (request->request_mode & ~(XtCWQueryOnly | CWWidth | CWHeight))
|
||
|
|
return XtGeometryNo;
|
||
|
|
|
||
|
|
if (request->request_mode & CWWidth)
|
||
|
|
allowed.width = request->width;
|
||
|
|
else
|
||
|
|
allowed.width = w->core.width;
|
||
|
|
|
||
|
|
if (request->request_mode & CWHeight)
|
||
|
|
allowed.height = request->height;
|
||
|
|
else
|
||
|
|
allowed.height = w->core.height;
|
||
|
|
|
||
|
|
if (allowed.width == w->core.width && allowed.height == w->core.height)
|
||
|
|
return XtGeometryNo;
|
||
|
|
|
||
|
|
if (!(request->request_mode & XtCWQueryOnly))
|
||
|
|
RefigureLocations(w);
|
||
|
|
|
||
|
|
return XtGeometryYes;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void RefigureLocations(Widget w)
|
||
|
|
{
|
||
|
|
DoLayout(w, False);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Calculate preferred size. We can't just use the current sizes
|
||
|
|
of the children, because that calculation would always end up with
|
||
|
|
our current size. Could query each child, and use that size to
|
||
|
|
recalculate a size for us, then if it ends up being larger than width
|
||
|
|
and height passed in, accept bounding box. However, we know our
|
||
|
|
children and they don't have any particular preferred geometry,
|
||
|
|
except the bigger the better. Therefore, if the parent suggested a
|
||
|
|
size, we'll take it. */
|
||
|
|
|
||
|
|
static XtGeometryResult QueryGeometry(Widget w, XtWidgetGeometry *request,
|
||
|
|
XtWidgetGeometry *reply_return)
|
||
|
|
{
|
||
|
|
XtGeometryResult result=XtGeometryNo;
|
||
|
|
|
||
|
|
request->request_mode &= CWWidth | CWHeight;
|
||
|
|
|
||
|
|
/* parent isn't going to change w or h, so nothing to re-compute */
|
||
|
|
|
||
|
|
if (request->request_mode == 0)
|
||
|
|
return XtGeometryYes;
|
||
|
|
|
||
|
|
/* if proposed size is large enough, accept it. Otherwise, suggest
|
||
|
|
our arbitrary initial size. */
|
||
|
|
|
||
|
|
if (request->request_mode & CWHeight)
|
||
|
|
{
|
||
|
|
if (request->height < INITIAL_HEIGHT)
|
||
|
|
{
|
||
|
|
result = XtGeometryAlmost;
|
||
|
|
reply_return->height = INITIAL_HEIGHT;
|
||
|
|
reply_return->request_mode &= CWHeight;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
result = XtGeometryYes;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (request->request_mode & CWWidth)
|
||
|
|
{
|
||
|
|
if (request->width < INITIAL_WIDTH)
|
||
|
|
{
|
||
|
|
result = XtGeometryAlmost;
|
||
|
|
reply_return->width = INITIAL_WIDTH;
|
||
|
|
reply_return->request_mode &= CWWidth;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
result = XtGeometryYes;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Actually layout the scrollBox */
|
||
|
|
|
||
|
|
static void Resize(Widget w)
|
||
|
|
{
|
||
|
|
DoLayout(w, True);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void ChangeManaged(Widget w)
|
||
|
|
{
|
||
|
|
DoLayout(w, True);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void Initialize(Widget request, Widget new,
|
||
|
|
ArgList args, Cardinal *num_args)
|
||
|
|
{
|
||
|
|
ScrollBoxWidget newsbw = (ScrollBoxWidget)new;
|
||
|
|
|
||
|
|
if (newsbw->core.width == 0)
|
||
|
|
newsbw->core.width = INITIAL_WIDTH;
|
||
|
|
|
||
|
|
if (newsbw->core.height == 0)
|
||
|
|
newsbw->core.height = INITIAL_HEIGHT;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static Boolean SetValues(Widget current, Widget request, Widget new,
|
||
|
|
ArgList args, Cardinal *num_args)
|
||
|
|
{
|
||
|
|
ScrollBoxWidget sbwcurrent = (ScrollBoxWidget)current;
|
||
|
|
ScrollBoxWidget sbwnew = (ScrollBoxWidget)new;
|
||
|
|
|
||
|
|
/* need to relayout if h_space or v_space change */
|
||
|
|
|
||
|
|
if ((sbwnew->scrollBox.h_space != sbwcurrent->scrollBox.h_space) ||
|
||
|
|
(sbwnew->scrollBox.v_space != sbwcurrent->scrollBox.v_space))
|
||
|
|
DoLayout(new, True);
|
||
|
|
|
||
|
|
return False;
|
||
|
|
}
|