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