/* $Xorg: Viewport.c,v 1.3 2000/08/17 19:45:43 cpqbld Exp $ */ /*********************************************************** Copyright 1987, 1988, 1994, 1998 The Open Group All Rights Reserved. The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of The Open Group shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The Open Group. Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of Digital not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ /* $XFree86: xc/lib/Xaw/Viewport.c,v 1.10 2001/08/23 00:03:20 dawes Exp $ */ #include #include #include #include #include #include #include "Private.h" /* * Class Methods */ static Boolean Layout(FormWidget, unsigned int, unsigned int, Bool); static void XawViewportChangeManaged(Widget); static void XawViewportInitialize(Widget, Widget, ArgList, Cardinal*); static void XawViewportConstraintInitialize(Widget, Widget, ArgList, Cardinal*); static XtGeometryResult XawViewportGeometryManager(Widget, XtWidgetGeometry*, XtWidgetGeometry*); static XtGeometryResult XawViewportQueryGeometry(Widget, XtWidgetGeometry*, XtWidgetGeometry*); static void XawViewportRealize(Widget, XtValueMask*, XSetWindowAttributes*); static void XawViewportResize(Widget); static Boolean XawViewportSetValues(Widget, Widget, Widget, ArgList, Cardinal*); /* * Prototypes */ static void ComputeLayout(Widget, Bool, Bool); static void ComputeWithForceBars(Widget, Bool, XtWidgetGeometry*, int*, int*); static Widget CreateScrollbar(ViewportWidget, Bool); static XtGeometryResult GeometryRequestPlusScrollbar(ViewportWidget, Bool, XtWidgetGeometry*, XtWidgetGeometry*); static Bool GetGeometry(Widget, unsigned int, unsigned int); static void MoveChild(ViewportWidget, int, int); static XtGeometryResult QueryGeometry(ViewportWidget, XtWidgetGeometry*, XtWidgetGeometry*); static void RedrawThumbs(ViewportWidget); static void ScrollUpDownProc(Widget, XtPointer, XtPointer); static void SendReport(ViewportWidget, unsigned int); static void SetBar(Widget, int, unsigned int, unsigned int); static XtGeometryResult TestSmaller(ViewportWidget, XtWidgetGeometry*, XtWidgetGeometry*); static void ThumbProc(Widget, XtPointer, XtPointer); /* * Initialization */ #define offset(field) XtOffsetOf(ViewportRec, viewport.field) static XtResource resources[] = { { XtNforceBars, XtCBoolean, XtRBoolean, sizeof(Boolean), offset(forcebars), XtRImmediate, (XtPointer)False }, { XtNallowHoriz, XtCBoolean, XtRBoolean, sizeof(Boolean), offset(allowhoriz), XtRImmediate, (XtPointer)False }, { XtNallowVert, XtCBoolean, XtRBoolean, sizeof(Boolean), offset(allowvert), XtRImmediate, (XtPointer)False }, { XtNuseBottom, XtCBoolean, XtRBoolean, sizeof(Boolean), offset(usebottom), XtRImmediate, (XtPointer)False }, { XtNuseRight, XtCBoolean, XtRBoolean, sizeof(Boolean), offset(useright), XtRImmediate, (XtPointer)False }, { XtNreportCallback, XtCReportCallback, XtRCallback, sizeof(XtPointer), offset(report_callbacks), XtRImmediate, NULL }, }; #undef offset #define Superclass (&formClassRec) ViewportClassRec viewportClassRec = { /* core */ { (WidgetClass)Superclass, /* superclass */ "Viewport", /* class_name */ sizeof(ViewportRec), /* widget_size */ XawInitializeWidgetSet, /* class_initialize */ NULL, /* class_part_init */ False, /* class_inited */ XawViewportInitialize, /* initialize */ NULL, /* initialize_hook */ XawViewportRealize, /* realize */ NULL, /* actions */ 0, /* num_actions */ resources, /* resources */ XtNumber(resources), /* num_resources */ NULLQUARK, /* xrm_class */ True, /* compress_motion */ True, /* compress_exposure */ True, /* compress_enterleave */ False, /* visible_interest */ NULL, /* destroy */ XawViewportResize, /* resize */ XtInheritExpose, /* expose */ XawViewportSetValues, /* set_values */ NULL, /* set_values_hook */ XtInheritSetValuesAlmost, /* set_values_almost */ NULL, /* get_values_hook */ NULL, /* accept_focus */ XtVersion, /* version */ NULL, /* callback_private */ NULL, /* tm_table */ XawViewportQueryGeometry, /* query_geometry */ XtInheritDisplayAccelerator, /* display_accelerator */ NULL, /* extension */ }, /* composite */ { XawViewportGeometryManager, /* geometry_manager */ XawViewportChangeManaged, /* change_managed */ XtInheritInsertChild, /* insert_child */ XtInheritDeleteChild, /* delete_child */ NULL, /* extension */ }, /* constraint */ { NULL, /* subresourses */ 0, /* subresource_count */ sizeof(ViewportConstraintsRec), /* constraint_size */ XawViewportConstraintInitialize, /* initialize */ NULL, /* destroy */ NULL, /* set_values */ NULL, /* extension */ }, /* form */ { Layout, /* layout */ }, /* viewport */ { NULL, /* extension */ }, }; WidgetClass viewportWidgetClass = (WidgetClass)&viewportClassRec; /* * Implementation */ static Widget CreateScrollbar(ViewportWidget w, Bool horizontal) { static Arg barArgs[] = { {XtNorientation, 0}, {XtNlength, 0}, {XtNleft, 0}, {XtNright, 0}, {XtNtop, 0}, {XtNbottom, 0}, {XtNmappedWhenManaged, False}, }; Widget clip = w->viewport.clip; ViewportConstraints constraints = (ViewportConstraints)clip->core.constraints; Widget bar; XtSetArg(barArgs[0], XtNorientation, horizontal ? XtorientHorizontal : XtorientVertical); XtSetArg(barArgs[1], XtNlength, horizontal ? XtWidth(clip) : XtHeight(clip)); XtSetArg(barArgs[2], XtNleft, !horizontal && w->viewport.useright ? XtChainRight : XtChainLeft); XtSetArg(barArgs[3], XtNright, !horizontal && !w->viewport.useright ? XtChainLeft : XtChainRight); XtSetArg(barArgs[4], XtNtop, horizontal && w->viewport.usebottom ? XtChainBottom: XtChainTop); XtSetArg(barArgs[5], XtNbottom, horizontal && !w->viewport.usebottom ? XtChainTop: XtChainBottom); bar = XtCreateWidget(horizontal ? "horizontal" : "vertical", scrollbarWidgetClass, (Widget)w, barArgs, XtNumber(barArgs)); XtAddCallback(bar, XtNscrollProc, ScrollUpDownProc, (XtPointer)w); XtAddCallback(bar, XtNjumpProc, ThumbProc, (XtPointer)w); if (horizontal) { w->viewport.horiz_bar = bar; constraints->form.vert_base = bar; } else { w->viewport.vert_bar = bar; constraints->form.horiz_base = bar; } XtManageChild(bar); return (bar); } /*ARGSUSED*/ static void XawViewportInitialize(Widget request, Widget cnew, ArgList args, Cardinal *num_args) { ViewportWidget w = (ViewportWidget)cnew; static Arg clip_args[8]; Cardinal arg_cnt; Widget h_bar, v_bar; Dimension clip_height, clip_width; w->form.default_spacing = 0; /* Reset the default spacing to 0 pixels */ /* * Initialize all widget pointers to NULL */ w->viewport.child = NULL; w->viewport.horiz_bar = w->viewport.vert_bar = NULL; /* * Create Clip Widget */ arg_cnt = 0; XtSetArg(clip_args[arg_cnt], XtNbackgroundPixmap, None); arg_cnt++; XtSetArg(clip_args[arg_cnt], XtNborderWidth, 0); arg_cnt++; XtSetArg(clip_args[arg_cnt], XtNleft, XtChainLeft); arg_cnt++; XtSetArg(clip_args[arg_cnt], XtNright, XtChainRight); arg_cnt++; XtSetArg(clip_args[arg_cnt], XtNtop, XtChainTop); arg_cnt++; XtSetArg(clip_args[arg_cnt], XtNbottom, XtChainBottom); arg_cnt++; XtSetArg(clip_args[arg_cnt], XtNwidth, XtWidth(w)); arg_cnt++; XtSetArg(clip_args[arg_cnt], XtNheight, XtHeight(w)); arg_cnt++; w->viewport.clip = XtCreateManagedWidget("clip", widgetClass, cnew, clip_args, arg_cnt); if (!w->viewport.forcebars) return; /* If we are not forcing the bars then we are done */ if (w->viewport.allowhoriz) (void)CreateScrollbar(w, True); if (w->viewport.allowvert) (void)CreateScrollbar(w, False); h_bar = w->viewport.horiz_bar; v_bar = w->viewport.vert_bar; /* * Set the clip widget to the correct height */ clip_width = XtWidth(w); clip_height = XtHeight(w); if (h_bar != NULL && XtWidth(w) > XtWidth(h_bar) + XtBorderWidth(h_bar)) clip_width -= XtWidth(h_bar) + XtBorderWidth(h_bar); if (v_bar != NULL && XtHeight(w) > XtHeight(v_bar) + XtBorderWidth(v_bar)) clip_height -= XtHeight(v_bar) + XtBorderWidth(v_bar); arg_cnt = 0; XtSetArg(clip_args[arg_cnt], XtNwidth, clip_width); arg_cnt++; XtSetArg(clip_args[arg_cnt], XtNheight, clip_height); arg_cnt++; XtSetValues(w->viewport.clip, clip_args, arg_cnt); } /*ARGSUSED*/ static void XawViewportConstraintInitialize(Widget request, Widget cnew, ArgList args, Cardinal *num_args) { ((ViewportConstraints)cnew->core.constraints)->viewport.reparented = False; } static void XawViewportRealize(Widget widget, XtValueMask *value_mask, XSetWindowAttributes *attributes) { ViewportWidget w = (ViewportWidget)widget; Widget child = w->viewport.child; Widget clip = w->viewport.clip; *value_mask |= CWBitGravity; attributes->bit_gravity = NorthWestGravity; (*Superclass->core_class.realize)(widget, value_mask, attributes); (*w->core.widget_class->core_class.resize)(widget); /* turn on bars */ if (child != NULL) { XtMoveWidget(child, 0, 0); XtRealizeWidget(clip); XtRealizeWidget(child); XReparentWindow(XtDisplay(w), XtWindow(child), XtWindow(clip), 0, 0); XtMapWidget(child); } } /*ARGSUSED*/ static Boolean XawViewportSetValues(Widget current, Widget request, Widget cnew, ArgList args, Cardinal *num_args) { ViewportWidget w = (ViewportWidget)cnew; ViewportWidget cw = (ViewportWidget)current; if (w->viewport.forcebars != cw->viewport.forcebars || w->viewport.allowvert != cw->viewport.allowvert || w->viewport.allowhoriz != cw->viewport.allowhoriz || w->viewport.useright != cw->viewport.useright || w->viewport.usebottom != cw->viewport.usebottom) (*w->core.widget_class->core_class.resize)(cnew); /* Recompute layout */ return (False); } static void XawViewportChangeManaged(Widget widget) { ViewportWidget w = (ViewportWidget)widget; int num_children = w->composite.num_children; Widget child, *childP; int i; child = NULL; for (childP = w->composite.children, i = 0; i < num_children; childP++, i++) { if (XtIsManaged(*childP) && *childP != w->viewport.clip && *childP != w->viewport.horiz_bar && *childP != w->viewport.vert_bar) { child = *childP; break; } } if (child != w->viewport.child) { w->viewport.child = child; if (child != NULL) { XtResizeWidget(child, XtWidth(child), XtHeight(child), 0); if (XtIsRealized(widget)) { ViewportConstraints constraints = (ViewportConstraints)child->core.constraints; if (!XtIsRealized(child)) { Window window = XtWindow(w); XtMoveWidget(child, 0, 0); w->core.window = XtWindow(w->viewport.clip); XtRealizeWidget(child); w->core.window = window; constraints->viewport.reparented = True; } else if (!constraints->viewport.reparented) { XReparentWindow(XtDisplay(w), XtWindow(child), XtWindow(w->viewport.clip), 0, 0); constraints->viewport.reparented = True; if (child->core.mapped_when_managed) XtMapWidget(child); } } GetGeometry(widget, XtWidth(child), XtHeight(child)); (*((ViewportWidgetClass)w->core.widget_class)->form_class.layout) ((FormWidget)w, XtWidth(w), XtHeight(w), True /* True? */); } } #ifdef notdef (*Superclass->composite_class.change_managed)(widget); #endif } static void SetBar(Widget w, int top, unsigned int length, unsigned int total) { XawScrollbarSetThumb(w, (float)top / (float)total, (float)length / (float)total); } static void RedrawThumbs(ViewportWidget w) { Widget child = w->viewport.child; Widget clip = w->viewport.clip; if (w->viewport.horiz_bar != NULL) SetBar(w->viewport.horiz_bar, -(int)XtX(child), XtWidth(clip), XtWidth(child)); if (w->viewport.vert_bar != NULL) SetBar(w->viewport.vert_bar, -(int)XtY(child), XtHeight(clip), XtHeight(child)); } static void SendReport(ViewportWidget w, unsigned int changed) { XawPannerReport rep; if (w->viewport.report_callbacks) { Widget child = w->viewport.child; Widget clip = w->viewport.clip; rep.changed = changed; rep.slider_x = -XtX(child); /* child is canvas */ rep.slider_y = -XtY(child); /* clip is slider */ rep.slider_width = XtWidth(clip); rep.slider_height = XtHeight(clip); rep.canvas_width = XtWidth(child); rep.canvas_height = XtHeight(child); XtCallCallbackList((Widget)w, w->viewport.report_callbacks, (XtPointer)&rep); } } static void MoveChild(ViewportWidget w, int x, int y) { Widget child = w->viewport.child; Widget clip = w->viewport.clip; /* make sure we never move past right/bottom borders */ if (-x + (int)XtWidth(clip) > XtWidth(child)) x = -(int)(XtWidth(child) - XtWidth(clip)); if (-y + (int)XtHeight(clip) > XtHeight(child)) y = -(int)(XtHeight(child) - XtHeight(clip)); /* make sure we never move past left/top borders */ if (x >= 0) x = 0; if (y >= 0) y = 0; XtMoveWidget(child, x, y); SendReport(w, (XawPRSliderX | XawPRSliderY)); RedrawThumbs(w); } static void ComputeLayout(Widget widget, Bool query, Bool destroy_scrollbars) { ViewportWidget w = (ViewportWidget)widget; Widget child = w->viewport.child; Widget clip = w->viewport.clip; ViewportConstraints constraints = (ViewportConstraints)clip->core.constraints; Bool needshoriz, needsvert; int clip_width, clip_height; XtWidgetGeometry intended; if (child == NULL) return; clip_width = XtWidth(w); clip_height = XtHeight(w); intended.request_mode = CWBorderWidth; intended.border_width = 0; if (w->viewport.forcebars) { needsvert = w->viewport.allowvert; needshoriz = w->viewport.allowhoriz; ComputeWithForceBars(widget, query, &intended, &clip_width, &clip_height); } else { Dimension prev_width, prev_height; XtGeometryMask prev_mode; XtWidgetGeometry preferred; needshoriz = needsvert = False; /* * intended.{width,height} caches the eventual child dimensions, * but we don't set the mode bits until after we decide that the * child's preferences are not acceptable */ if (!w->viewport.allowhoriz) intended.request_mode |= CWWidth; if (XtWidth(child) < clip_width) intended.width = clip_width; else intended.width = XtWidth(child); if (XtHeight(child) < clip_height) intended.height = clip_height; else intended.height = XtHeight(child); if (!w->viewport.allowvert) intended.request_mode |= CWHeight; if (!query) { preferred.width = XtWidth(child); preferred.height = XtHeight(child); } do { /* while intended != prev */ if (query) { (void)XtQueryGeometry(child, &intended, &preferred); if (!(preferred.request_mode & CWWidth)) preferred.width = intended.width; if (!(preferred.request_mode & CWHeight)) preferred.height = intended.height; } prev_width = intended.width; prev_height = intended.height; prev_mode = intended.request_mode; /* * note that having once decided to turn on either bar * we'll not change our mind until we're next resized, * thus avoiding potential oscillations */ #define CheckHoriz() \ if (w->viewport.allowhoriz && \ preferred.width > clip_width) { \ if (!needshoriz) { \ Widget bar; \ \ needshoriz = True; \ if ((bar = w->viewport.horiz_bar) == NULL) \ bar = CreateScrollbar(w, True); \ clip_height -= XtHeight(bar) + XtBorderWidth(bar); \ if (clip_height < 1) \ clip_height = 1; \ } \ intended.width = preferred.width; \ } CheckHoriz(); if (w->viewport.allowvert && preferred.height > clip_height) { if (!needsvert) { Widget bar; needsvert = True; if ((bar = w->viewport.vert_bar) == NULL) bar = CreateScrollbar(w, False); clip_width -= XtWidth(bar) + XtBorderWidth(bar); if (clip_width < 1) clip_width = 1; CheckHoriz(); } intended.height = preferred.height; } if (!w->viewport.allowhoriz || preferred.width < clip_width) { intended.width = clip_width; intended.request_mode |= CWWidth; } if (!w->viewport.allowvert || preferred.height < clip_height) { intended.height = clip_height; intended.request_mode |= CWHeight; } } while (intended.request_mode != prev_mode || (intended.request_mode & CWWidth && intended.width != prev_width) || (intended.request_mode & CWHeight && intended.height != prev_height)); } if (XtIsRealized(clip)) XRaiseWindow(XtDisplay(clip), XtWindow(clip)); XtMoveWidget(clip, needsvert ? w->viewport.useright ? 0 : XtWidth(w->viewport.vert_bar) + XtBorderWidth(w->viewport.vert_bar) : 0, needshoriz ? w->viewport.usebottom ? 0 : XtHeight(w->viewport.horiz_bar) + XtBorderWidth(w->viewport.horiz_bar) : 0); XtResizeWidget(clip, clip_width, clip_height, 0); if (w->viewport.horiz_bar != NULL) { Widget bar = w->viewport.horiz_bar; if (!needshoriz) { constraints->form.vert_base = NULL; if (destroy_scrollbars) { XtDestroyWidget(bar); w->viewport.horiz_bar = NULL; } } else { int bw = XtBorderWidth(bar); XtResizeWidget(bar, clip_width, XtHeight(bar), bw); XtMoveWidget(bar, needsvert && !w->viewport.useright ? XtWidth(w->viewport.vert_bar) : -bw, w->viewport.usebottom ? XtHeight(w) - XtHeight(bar) - bw : -bw); XtSetMappedWhenManaged(bar, True); } } if (w->viewport.vert_bar != NULL) { Widget bar = w->viewport.vert_bar; if (!needsvert) { constraints->form.horiz_base = NULL; if (destroy_scrollbars) { XtDestroyWidget(bar); w->viewport.vert_bar = NULL; } } else { int bw = bar->core.border_width; XtResizeWidget(bar, XtWidth(bar), clip_height, bw); XtMoveWidget(bar, w->viewport.useright ? XtWidth(w) - XtWidth(bar) - bw : -bw, needshoriz && !w->viewport.usebottom ? XtHeight(w->viewport.horiz_bar) : -bw); XtSetMappedWhenManaged(bar, True); } } if (child != NULL) { XtResizeWidget(child, intended.width, intended.height, 0); MoveChild(w, needshoriz ? XtX(child) : 0, needsvert ? XtY(child) : 0); } SendReport (w, XawPRAll); } /* * Function: * ComputeWithForceBars * * Parameters: * widget - viewport widget * query - whether or not to query the child * intended - cache of the childs height is stored here * (used and returned) * clip_width - size of clip window (used and returned) * clip_height - "" * * Description: * Computes the layout give forcebars is set. */ static void ComputeWithForceBars(Widget widget, Bool query, XtWidgetGeometry *intended, int *clip_width, int *clip_height) { ViewportWidget w = (ViewportWidget)widget; Widget child = w->viewport.child; XtWidgetGeometry preferred; /* * If forcebars then needs = allows = has * Thus if needsvert is set it MUST have a scrollbar */ if (w->viewport.allowvert) { if (w->viewport.vert_bar == NULL) w->viewport.vert_bar = CreateScrollbar(w, False); *clip_width -= XtWidth(w->viewport.vert_bar) + XtBorderWidth(w->viewport.vert_bar); } if (w->viewport.allowhoriz) { if (w->viewport.horiz_bar == NULL) w->viewport.horiz_bar = CreateScrollbar(w, True); *clip_height -= XtHeight(w->viewport.horiz_bar) + XtBorderWidth(w->viewport.horiz_bar); } AssignMax(*clip_width, 1); AssignMax(*clip_height, 1); if (!w->viewport.allowvert) { intended->height = *clip_height; intended->request_mode = CWHeight; } if (!w->viewport.allowhoriz) { intended->width = *clip_width; intended->request_mode = CWWidth; } if (query) { if (w->viewport.allowvert || w->viewport.allowhoriz) { XtQueryGeometry(child, intended, &preferred); if (!(intended->request_mode & CWWidth)) { if (preferred.request_mode & CWWidth) intended->width = preferred.width; else intended->width = XtWidth(child); } if (!(intended->request_mode & CWHeight)) { if (preferred.request_mode & CWHeight) intended->height = preferred.height; else intended->height = XtHeight(child); } } } else { if (w->viewport.allowvert) intended->height = XtHeight(child); if (w->viewport.allowhoriz) intended->width = XtWidth(child); } if (*clip_width > (int)intended->width) intended->width = *clip_width; if (*clip_height > (int)intended->height) intended->height = *clip_height; } static void XawViewportResize(Widget widget) { ComputeLayout(widget, True, True); } /*ARGSUSED*/ static Boolean Layout(FormWidget w, unsigned int width, unsigned int height, Bool force) { ComputeLayout((Widget)w, True, True); w->form.preferred_width = XtWidth(w); w->form.preferred_height = XtHeight(w); return (False); } static void ScrollUpDownProc(Widget widget, XtPointer closure, XtPointer call_data) { ViewportWidget w = (ViewportWidget)closure; Widget child = w->viewport.child; int pix = (long)call_data; int x, y; if (child == NULL) return; x = XtX(child) - (widget == w->viewport.horiz_bar ? pix : 0); y = XtY(child) - (widget == w->viewport.vert_bar ? pix : 0); MoveChild(w, x, y); } /*ARGSUSED*/ static void ThumbProc(Widget widget, XtPointer closure, XtPointer call_data) { ViewportWidget w = (ViewportWidget)closure; Widget child = w->viewport.child; float percent = *(float *)call_data; int x, y; if (child == NULL) return; if (widget == w->viewport.horiz_bar) x = -percent * XtWidth(child); else x = XtX(child); if (widget == w->viewport.vert_bar) y = -percent * XtHeight(child); else y = XtY(child); MoveChild(w, x, y); } static XtGeometryResult TestSmaller(ViewportWidget w, XtWidgetGeometry *request, XtWidgetGeometry *reply_return) { if (request->width < XtWidth(w) || request->height < XtHeight(w)) return (XtMakeGeometryRequest((Widget)w, request, reply_return)); return (XtGeometryYes); } static XtGeometryResult GeometryRequestPlusScrollbar(ViewportWidget w, Bool horizontal, XtWidgetGeometry *request, XtWidgetGeometry *reply_return) { Widget sb; XtWidgetGeometry plusScrollbars; plusScrollbars = *request; if ((sb = w->viewport.horiz_bar) == NULL) sb = CreateScrollbar(w, horizontal); request->width += XtWidth(sb); request->height += XtHeight(sb); XtDestroyWidget(sb); return (XtMakeGeometryRequest((Widget)w, &plusScrollbars, reply_return)); } #define WidthChange() (request->width != XtWidth(w)) #define HeightChange() (request->height != XtHeight(w)) static XtGeometryResult QueryGeometry(ViewportWidget w, XtWidgetGeometry *request, XtWidgetGeometry *reply_return) { if (w->viewport.allowhoriz && w->viewport.allowvert) return (TestSmaller(w, request, reply_return)); else if (w->viewport.allowhoriz && !w->viewport.allowvert) { if (WidthChange() && !HeightChange()) return (TestSmaller(w, request, reply_return)); else if (!WidthChange() && HeightChange()) return (XtMakeGeometryRequest((Widget)w, request, reply_return)); else if (WidthChange() && HeightChange()) return (GeometryRequestPlusScrollbar(w, True, request, reply_return)); else /* !WidthChange() && !HeightChange() */ return (XtGeometryYes); } else if (!w->viewport.allowhoriz && w->viewport.allowvert) { if (!WidthChange() && HeightChange()) return (TestSmaller(w, request, reply_return)); else if (WidthChange() && !HeightChange()) return (XtMakeGeometryRequest((Widget)w, request, reply_return)); else if (WidthChange() && HeightChange()) return (GeometryRequestPlusScrollbar(w, False, request, reply_return)); else /* !WidthChange() && !HeightChange() */ return (XtGeometryYes); } else /* (!w->viewport.allowhoriz && !w->viewport.allowvert) */ return (XtMakeGeometryRequest((Widget)w, request, reply_return)); } #undef WidthChange #undef HeightChange static XtGeometryResult XawViewportGeometryManager(Widget child, XtWidgetGeometry *request, XtWidgetGeometry *reply) { ViewportWidget w = (ViewportWidget)child->core.parent; Bool rWidth = (request->request_mode & CWWidth) != 0; Bool rHeight = (request->request_mode & CWHeight) != 0; XtWidgetGeometry allowed; XtGeometryResult result; Bool reconfigured; Bool child_changed_size; unsigned int height_remaining; if (request->request_mode & XtCWQueryOnly) return (QueryGeometry(w, request, reply)); if (child != w->viewport.child || request->request_mode & ~(CWWidth | CWHeight | CWBorderWidth) || ((request->request_mode & CWBorderWidth) && request->border_width > 0)) return (XtGeometryNo); allowed = *request; reconfigured = GetGeometry((Widget)w, rWidth ? request->width : XtWidth(w), rHeight ? request->height : XtHeight(w)); child_changed_size = (rWidth && XtWidth(child) != request->width) || (rHeight && XtHeight(child) != request->height); height_remaining = XtHeight(w); if (rWidth && XtWidth(w) != request->width) { if (w->viewport.allowhoriz && request->width > XtWidth(w)) { /* horizontal scrollbar will be needed so possibly reduce height */ Widget bar; if ((bar = w->viewport.horiz_bar) == NULL) bar = CreateScrollbar(w, True); height_remaining -= XtHeight(bar) + XtBorderWidth(bar); reconfigured = True; } else allowed.width = XtWidth(w); } if (rHeight && height_remaining != request->height) { if (w->viewport.allowvert && request->height > height_remaining) { /* vertical scrollbar will be needed, so possibly reduce width */ if (!w->viewport.allowhoriz || request->width < XtWidth(w)) { Widget bar; if ((bar = w->viewport.vert_bar) == NULL) bar = CreateScrollbar(w, False); if (!rWidth) { allowed.width = XtWidth(w); allowed.request_mode |= CWWidth; } if (allowed.width > XtWidth(bar) + XtBorderWidth(bar)) allowed.width -= XtWidth(bar) + XtBorderWidth(bar); else allowed.width = 1; reconfigured = True; } } else allowed.height = height_remaining; } if (allowed.width != request->width || allowed.height != request->height) { *reply = allowed; result = XtGeometryAlmost; } else { if (rWidth) XtWidth(child) = request->width; if (rHeight) XtHeight(child) = request->height; result = XtGeometryYes; } if (reconfigured || child_changed_size) ComputeLayout((Widget)w, False, result == XtGeometryYes); return (result); } static Bool GetGeometry(Widget w, unsigned int width, unsigned int height) { XtWidgetGeometry geometry, return_geom; XtGeometryResult result; if (width == XtWidth(w) && height == XtHeight(w)) return (False); geometry.request_mode = CWWidth | CWHeight; geometry.width = width; geometry.height = height; if (XtIsRealized(w)) { if (((ViewportWidget)w)->viewport.allowhoriz && width > XtWidth(w)) geometry.width = XtWidth(w); if (((ViewportWidget)w)->viewport.allowvert && height > XtHeight(w)) geometry.height = XtHeight(w); } else { /* This is the Realize call; we'll inherit a w&h iff none currently */ if (XtWidth(w) != 0) { if (XtHeight(w) != 0) return (False); geometry.width = XtWidth(w); } if (XtHeight(w) != 0) geometry.height = XtHeight(w); } result = XtMakeGeometryRequest(w, &geometry, &return_geom); if (result == XtGeometryAlmost) result = XtMakeGeometryRequest(w, &return_geom, NULL); return (result == XtGeometryYes); } static XtGeometryResult XawViewportQueryGeometry(Widget w, XtWidgetGeometry *constraints, XtWidgetGeometry *reply) { if (((ViewportWidget)w)->viewport.child != NULL) return (XtQueryGeometry(((ViewportWidget)w)->viewport.child, constraints, reply)); return (XtGeometryYes); } void XawViewportSetLocation ( Widget gw, #if NeedWidePrototypes double xoff, double yoff #else float xoff, float yoff #endif ) { ViewportWidget w = (ViewportWidget)gw; Widget child = w->viewport.child; int x, y; if (xoff > 1.0) /* scroll to right */ x = XtWidth(child); else if (xoff < 0.0) /* if the offset is < 0.0 nothing */ x = XtX(child); else x = (float)XtWidth(child) * xoff; if (yoff > 1.0) y = XtHeight(child); else if (yoff < 0.0) y = XtY(child); else y = (float)XtHeight(child) * yoff; MoveChild (w, -x, -y); } void XawViewportSetCoordinates(Widget gw, #if NeedWidePrototypes int x, int y #else Position x, Position y #endif ) { ViewportWidget w = (ViewportWidget)gw; Widget child = w->viewport.child; if (x > XtWidth(child)) x = XtWidth(child); else if (x < 0) x = XtX(child); if (y > XtHeight(child)) y = XtHeight(child); else if (y < 0) y = XtY(child); MoveChild (w, -x, -y); }