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- /* Form.c: implementation of the Athena Form widget. The geometry
- manager has been modified from the distributed version.
-
- Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts,
- and the Massachusetts Institute of Technology, Cambridge, 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 names of Digital or MIT 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.
-
- ******************************************************************/
-
- #include <X11/IntrinsicP.h>
- #include <X11/StringDefs.h>
- #include <X11/Xmu/Converters.h>
- #include <X11/Xmu/CharSet.h>
- #include <X11/Xaw/XawInit.h>
-
- #include <X11/Xaw/FormP.h>
-
- /* Private Definitions */
-
- static int default_value = -99999;
-
- #define Offset(field) XtOffset(FormWidget, form.field)
- static XtResource resources[] = {
- {XtNdefaultDistance, XtCThickness, XtRInt, sizeof(int),
- Offset(default_spacing), XtRImmediate, (caddr_t)4}
- };
- #undef Offset
-
- static XtEdgeType defEdge = XtRubber;
-
- #define Offset(field) XtOffset(FormConstraints, form.field)
- static XtResource formConstraintResources[] = {
- {XtNtop, XtCEdge, XtREdgeType, sizeof(XtEdgeType),
- Offset(top), XtREdgeType, (XtPointer)&defEdge},
- {XtNbottom, XtCEdge, XtREdgeType, sizeof(XtEdgeType),
- Offset(bottom), XtREdgeType, (XtPointer)&defEdge},
- {XtNleft, XtCEdge, XtREdgeType, sizeof(XtEdgeType),
- Offset(left), XtREdgeType, (XtPointer)&defEdge},
- {XtNright, XtCEdge, XtREdgeType, sizeof(XtEdgeType),
- Offset(right), XtREdgeType, (XtPointer)&defEdge},
- {XtNhorizDistance, XtCThickness, XtRInt, sizeof(int),
- Offset(dx), XtRInt, (XtPointer) &default_value},
- {XtNfromHoriz, XtCWidget, XtRWidget, sizeof(Widget),
- Offset(horiz_base), XtRWidget, (XtPointer)NULL},
- {XtNvertDistance, XtCThickness, XtRInt, sizeof(int),
- Offset(dy), XtRInt, (XtPointer) &default_value},
- {XtNfromVert, XtCWidget, XtRWidget, sizeof(Widget),
- Offset(vert_base), XtRWidget, (XtPointer)NULL},
- {XtNresizable, XtCBoolean, XtRBoolean, sizeof(Boolean),
- Offset(allow_resize), XtRImmediate, (XtPointer) FALSE},
- };
- #undef Offset
-
- static void ClassInitialize(), ClassPartInitialize(), Initialize(), Resize();
- static void ConstraintInitialize();
- static Boolean SetValues(), ConstraintSetValues();
- static XtGeometryResult GeometryManager(), PreferredGeometry();
- static void ChangeManaged();
- static Boolean Layout();
-
- FormClassRec formClassRec = {
- { /* core_class fields */
- /* superclass */ (WidgetClass) &constraintClassRec,
- /* class_name */ "Form",
- /* widget_size */ sizeof(FormRec),
- /* class_initialize */ ClassInitialize,
- /* class_part_init */ ClassPartInitialize,
- /* 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 */ XtInheritExpose,
- /* 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 */ PreferredGeometry,
- /* display_accelerator*/ XtInheritDisplayAccelerator,
- /* extension */ NULL
- },
- { /* composite_class fields */
- /* geometry_manager */ GeometryManager,
- /* change_managed */ ChangeManaged,
- /* insert_child */ XtInheritInsertChild,
- /* delete_child */ XtInheritDeleteChild,
- /* extension */ NULL
- },
- { /* constraint_class fields */
- /* subresourses */ formConstraintResources,
- /* subresource_count */ XtNumber(formConstraintResources),
- /* constraint_size */ sizeof(FormConstraintsRec),
- /* initialize */ ConstraintInitialize,
- /* destroy */ NULL,
- /* set_values */ ConstraintSetValues,
- /* extension */ NULL
- },
- { /* form_class fields */
- /* layout */ Layout
- }
- };
-
- WidgetClass formWidgetClass = (WidgetClass)&formClassRec;
-
- /****************************************************************
- *
- * Private Procedures
- *
- ****************************************************************/
-
-
- static XrmQuark XtQChainLeft, XtQChainRight, XtQChainTop,
- XtQChainBottom, XtQRubber;
-
- #define done(address, type) \
- { toVal->size = sizeof(type); \
- toVal->addr = (caddr_t) address; \
- return; \
- }
-
- /* ARGSUSED */
- static void _CvtStringToEdgeType(args, num_args, fromVal, toVal)
- XrmValuePtr args; /* unused */
- Cardinal *num_args; /* unused */
- XrmValuePtr fromVal;
- XrmValuePtr toVal;
- {
- static XtEdgeType edgeType;
- XrmQuark q;
- char lowerName[1000];
-
- XmuCopyISOLatin1Lowered (lowerName, (char*)fromVal->addr);
- q = XrmStringToQuark(lowerName);
- if (q == XtQChainLeft) {
- edgeType = XtChainLeft;
- done(&edgeType, XtEdgeType);
- }
- if (q == XtQChainRight) {
- edgeType = XtChainRight;
- done(&edgeType, XtEdgeType);
- }
- if (q == XtQChainTop) {
- edgeType = XtChainTop;
- done(&edgeType, XtEdgeType);
- }
- if (q == XtQChainBottom) {
- edgeType = XtChainBottom;
- done(&edgeType, XtEdgeType);
- }
- if (q == XtQRubber) {
- edgeType = XtRubber;
- done(&edgeType, XtEdgeType);
- }
-
- XtStringConversionWarning(fromVal->addr, "edgeType");
- toVal->addr = NULL;
- toVal->size = 0;
- }
-
- static void ClassInitialize()
- {
- static XtConvertArgRec parentCvtArgs[] = {
- {XtBaseOffset, (caddr_t)XtOffset(Widget, core.parent), sizeof(Widget)}
- };
- XawInitializeWidgetSet();
- XtQChainLeft = XrmStringToQuark("chainleft");
- XtQChainRight = XrmStringToQuark("chainright");
- XtQChainTop = XrmStringToQuark("chaintop");
- XtQChainBottom = XrmStringToQuark("chainbottom");
- XtQRubber = XrmStringToQuark("rubber");
-
- XtAddConverter( XtRString, XtREdgeType, _CvtStringToEdgeType, NULL, 0 );
- XtAddConverter( XtRString, XtRWidget, XmuCvtStringToWidget,
- parentCvtArgs, XtNumber(parentCvtArgs) );
- }
-
- static void ClassPartInitialize(class)
- WidgetClass class;
- {
- register FormWidgetClass c = (FormWidgetClass)class;
-
- if (c->form_class.layout == XtInheritLayout)
- c->form_class.layout = Layout;
- }
-
-
- /* ARGSUSED */
- static void Initialize(request, new)
- Widget request, new;
- {
- FormWidget fw = (FormWidget)new;
-
- fw->form.old_width = fw->core.width;
- fw->form.old_height = fw->core.height;
- fw->form.no_refigure = False;
- fw->form.needs_relayout = False;
- fw->form.resize_in_layout = True;
- }
-
-
- static void RefigureLocations(w)
- FormWidget w;
- {
- if (w->form.no_refigure) {
- w->form.needs_relayout = True;
- }
- else {
- (*((FormWidgetClass)w->core.widget_class)->form_class.layout)
- ( w, w->core.width, w->core.height );
- w->form.needs_relayout = False;
- }
- }
-
- /* ARGSUSED */
- static Boolean Layout(fw, width, height)
- FormWidget fw;
- Dimension width, height;
- {
- int num_children = fw->composite.num_children;
- WidgetList children = fw->composite.children;
- Widget *childP;
- Position maxx, maxy;
- static void LayoutChild();
- Boolean ret_val;
-
- for (childP = children; childP - children < num_children; childP++) {
- FormConstraints form = (FormConstraints)(*childP)->core.constraints;
- form->form.layout_state = LayoutPending;
- }
-
- maxx = maxy = 1;
-
- #define CHILD_BORDER_WIDTH(childP) ((*childP)->core.border_width << 1)
- #define CHILD_RIGHT_EDGE(childP) ((*childP)->core.x \
- + (*childP)->core.width + CHILD_BORDER_WIDTH (childP))
- #define CHILD_BOTTOM_EDGE(childp) ((*childP)->core.y \
- + (*childP)->core.height + CHILD_BORDER_WIDTH (childP))
-
- for (childP = children; childP - children < num_children; childP++) {
- if (XtIsManaged(*childP)) {
- Position x, y;
- LayoutChild(*childP);
- x = CHILD_RIGHT_EDGE (childP);
- y = CHILD_BOTTOM_EDGE (childP);
- if (maxx < x) maxx = x;
- if (maxy < y) maxy = y;
- }
- }
-
- fw->form.preferred_width = (maxx += fw->form.default_spacing);
- fw->form.preferred_height = (maxy += fw->form.default_spacing);
-
- if (fw->form.resize_in_layout
- && ((Dimension) maxx != fw->core.width
- || (Dimension) maxy != fw->core.height)) {
- XtGeometryResult result;
- result = XtMakeResizeRequest( (Widget) fw,
- (Dimension)maxx, (Dimension)maxy,
- (Dimension*)&maxx, (Dimension*)&maxy );
- if (result == XtGeometryAlmost)
- result = XtMakeResizeRequest( (Widget) fw,
- (Dimension)maxx, (Dimension)maxy,
- NULL, NULL );
- else if (result == XtGeometryNo) {
- /* Resize the children, since at least one of them doesn't
- fit within our current borders. */
- for (childP = children; childP - children < num_children;
- childP++) {
- if (XtIsManaged(*childP)) {
- Dimension w
- = CHILD_RIGHT_EDGE (childP) > fw->core.width
- ? fw->core.width - (*childP)->core.x
- - CHILD_BORDER_WIDTH (childP)
- : (*childP)->core.width;
- Dimension h
- = CHILD_BOTTOM_EDGE (childP) > fw->core.height
- ? fw->core.height - (*childP)->core.y
- - CHILD_BORDER_WIDTH (childP)
- : (*childP)->core.height;
- XtResizeWidget(*childP, w, h, (*childP)->core.border_width);
- }
- }
- }
-
- fw->form.old_width = fw->core.width;
- fw->form.old_height = fw->core.height;
- ret_val = (result == XtGeometryYes);
- } else ret_val = False;
-
- return ret_val;
- }
-
-
- static void LayoutChild(w)
- Widget w;
- {
- FormConstraints form = (FormConstraints)w->core.constraints;
- Position x, y;
- Widget ref;
-
- switch (form->form.layout_state) {
-
- case LayoutPending:
- form->form.layout_state = LayoutInProgress;
- break;
-
- case LayoutDone:
- return;
-
- case LayoutInProgress:
- {
- String subs[2];
- Cardinal num_subs = 2;
- subs[0] = w->core.name;
- subs[1] = w->core.parent->core.name;
- XtAppWarningMsg(XtWidgetToApplicationContext(w),
- "constraintLoop","xawFormLayout","XawToolkitError",
- "constraint loop detected while laying out child '%s' in FormWidget '%s'",
- subs, &num_subs);
- return;
- }
- }
- x = form->form.dx;
- y = form->form.dy;
- if ((ref = form->form.horiz_base) != (Widget)NULL) {
- LayoutChild(ref);
- x += ref->core.x + ref->core.width + (ref->core.border_width << 1);
- }
- if ((ref = form->form.vert_base) != (Widget)NULL) {
- LayoutChild(ref);
- y += ref->core.y + ref->core.height + (ref->core.border_width << 1);
- }
- XtMoveWidget( w, x, y );
- form->form.layout_state = LayoutDone;
- }
-
-
- static Position TransformCoord(loc, old, new, type)
- register Position loc;
- Dimension old, new;
- XtEdgeType type;
- {
- if (type == XtRubber) {
- if ( ((int) old) > 0)
- loc = (loc * new) / old;
- }
- else if (type == XtChainBottom || type == XtChainRight)
- loc += (Position)new - (Position)old;
-
- /* I don't see any problem with returning values less than zero. */
-
- return (loc);
- }
-
-
- static void Resize(w)
- Widget w;
- {
- FormWidget fw = (FormWidget)w;
- WidgetList children = fw->composite.children;
- int num_children = fw->composite.num_children;
- Widget *childP;
- Position x, y;
- Dimension width, height;
-
- for (childP = children; childP - children < num_children; childP++) {
- FormConstraints form = (FormConstraints)(*childP)->core.constraints;
- if (!XtIsManaged(*childP)) continue;
- x = TransformCoord( (*childP)->core.x, fw->form.old_width,
- fw->core.width, form->form.left );
- y = TransformCoord( (*childP)->core.y, fw->form.old_height,
- fw->core.height, form->form.top );
-
- form->form.virtual_width =
- TransformCoord((Position)((*childP)->core.x
- + form->form.virtual_width
- + 2 * (*childP)->core.border_width),
- fw->form.old_width, fw->core.width,
- form->form.right )
- - (x + 2 * (*childP)->core.border_width);
-
- form->form.virtual_height =
- TransformCoord((Position)((*childP)->core.y
- + form->form.virtual_height
- + 2 * (*childP)->core.border_width),
- fw->form.old_height, fw->core.height,
- form->form.bottom )
- - ( y + 2 * (*childP)->core.border_width);
-
- width = (Dimension)
- (form->form.virtual_width < 1) ? 1 : form->form.virtual_width;
- height = (Dimension)
- (form->form.virtual_height < 1) ? 1 : form->form.virtual_height;
-
- XtConfigureWidget( *childP, x, y, (Dimension)width, (Dimension)height,
- (*childP)->core.border_width );
- }
-
- fw->form.old_width = fw->core.width;
- fw->form.old_height = fw->core.height;
- }
-
-
- /* ARGSUSED */
- static XtGeometryResult GeometryManager(w, request, reply)
- Widget w;
- XtWidgetGeometry *request;
- XtWidgetGeometry *reply; /* RETURN */
- {
- XtWidgetGeometry allowed, parent_request;
- Boolean parent_no = False, parent_almost = False;
- Boolean querying = request->request_mode & XtCWQueryOnly;
- Boolean requesting_width = request->request_mode & CWWidth;
- Boolean requesting_height = request->request_mode & CWHeight;
- FormWidget fw = (FormWidget) w->core.parent;
- FormConstraints fc = (FormConstraints)w->core.constraints;
-
- /* Only allow width and height changes (unless just querying). */
- if ((request->request_mode & ~(XtCWQueryOnly | CWWidth | CWHeight))
- || !fc->form.allow_resize)
- return XtGeometryNo;
-
- /* If the size of the child is the same as it was before, we don't
- need to do anything. */
- if ((!requesting_width || request->width == w->core.width)
- && (!requesting_height || request->height == w->core.height))
- return XtGeometryYes;
-
- #define REQUESTED_RIGHT_EDGE (w->core.x + request->width \
- + (w->core.border_width << 1))
- #define REQUESTED_BOTTOM_EDGE (w->core.y + request->height \
- + (w->core.border_width << 1))
-
- /* Check if the child wants to go outside our current borders. */
- parent_request.request_mode = 0;
-
- if (requesting_width) {
- if (REQUESTED_RIGHT_EDGE > fw->core.width) {
- parent_request.request_mode |= CWWidth;
- parent_request.width = request->width;
- } else
- /* Else the new size fits already, or is smaller. */
- allowed.width = request->width;
- } else
- allowed.width = w->core.width; /* Don't change it. */
-
- if (requesting_height) {
- if (REQUESTED_BOTTOM_EDGE > fw->core.height) {
- parent_request.request_mode |= CWHeight;
- parent_request.height = request->height;
- } else
- allowed.height = request->height;
- } else
- allowed.height = w->core.height;
-
- /* If necessary, ask our parent if we can grow. */
- if (parent_request.request_mode != 0) {
- XtGeometryResult result;
- XtWidgetGeometry parent_return;
-
- if (querying)
- parent_request.request_mode |= XtCWQueryOnly;
- result = XtMakeGeometryRequest ((Widget) fw, &parent_request,
- &parent_return);
- if (result == XtGeometryNo)
- parent_no = True;
- else if (result == XtGeometryAlmost) {
- XtMakeGeometryRequest ((Widget) fw, &parent_return, NULL);
- parent_almost = True;
- }
- if (parent_request.request_mode & CWWidth)
- allowed.width = fw->core.width - w->core.x
- - (w->core.border_width << 1);
- if (parent_request.request_mode & CWHeight)
- allowed.height = fw->core.height - w->core.y
- - (w->core.border_width << 1);
- }
-
- /* If we needed to grow, and the parent didn't let us, we couldn't
- satisfy the request. Say that we'll let the widget go right up to
- our edge, and return XtGeometryAlmost. */
- if (parent_no || parent_almost) {
- if (reply != NULL) {
- reply->request_mode = CWWidth | CWHeight;
- reply->width = allowed.width;
- reply->height = allowed.height;
- }
- return XtGeometryAlmost;
- } else if (!querying) {
- /* We were able to satisfy everything, so reset the virtual width
- and height. */
- fc->form.virtual_width = w->core.width = allowed.width;
- fc->form.virtual_height = w->core.height = allowed.height;
- RefigureLocations(fw);
- }
-
- /* This return only applies to the last else clause, but putting it
- here keeps the warnings away. */
- return XtGeometryYes;
- }
-
-
-
- /* ARGSUSED */
- static Boolean SetValues(current, request, new)
- Widget current, request, new;
- {
- return( FALSE );
- }
-
-
- /* ARGSUSED */
- static void ConstraintInitialize(request, new)
- Widget request, new;
- {
- FormConstraints form = (FormConstraints)new->core.constraints;
- FormWidget fw = (FormWidget)new->core.parent;
-
- form->form.virtual_width = (int) new->core.width;
- form->form.virtual_height = (int) new->core.height;
-
- if (form->form.dx == default_value)
- form->form.dx = fw->form.default_spacing;
-
- if (form->form.dy == default_value)
- form->form.dy = fw->form.default_spacing;
- }
-
- /* ARGSUSED */
- static Boolean ConstraintSetValues(current, request, new)
- Widget current, request, new;
- {
- return( FALSE );
- }
-
- static void ChangeManaged(w)
- Widget w;
- {
- FormWidget fw = (FormWidget)w;
- FormConstraints form;
- WidgetList children, childP;
- int num_children = fw->composite.num_children;
- Widget child;
-
- /*
- * Reset virtual width and height for all children.
- */
-
- for (children = childP = fw->composite.children ;
- childP - children < num_children; childP++) {
- child = *childP;
- if (XtIsManaged(child)) {
- form = (FormConstraints)child->core.constraints;
-
- /*
- * If the size is one (1) then we must not change the virtual sizes, as
- * they contain useful information. If someone actually wants a widget of
- * width or height one (1) in a form widget he will lose, can't win them all.
- *
- * Chris D. Peterson 2/9/89.
- */
-
-
- if ( child->core.width != 1)
- form->form.virtual_width = (int) child->core.width;
- if ( child->core.height != 1)
- form->form.virtual_height = (int) child->core.height;
- }
- }
- RefigureLocations( (FormWidget)w );
- }
-
-
- static XtGeometryResult PreferredGeometry( widget, request, reply )
- Widget widget;
- XtWidgetGeometry *request, *reply;
- {
- FormWidget w = (FormWidget)widget;
-
- reply->width = w->form.preferred_width;
- reply->height = w->form.preferred_height;
- reply->request_mode = CWWidth | CWHeight;
- if ( request->request_mode & (CWWidth | CWHeight) ==
- reply->request_mode & (CWWidth | CWHeight)
- && request->width == reply->width
- && request->height == reply->height)
- return XtGeometryYes;
- else if (reply->width == w->core.width && reply->height == w->core.height)
- return XtGeometryNo;
- else
- return XtGeometryAlmost;
- }
-
-
- /**********************************************************************
- *
- * Public routines
- *
- **********************************************************************/
-
- /*
- * Set or reset figuring (ignored if not realized)
- */
-
- void XawFormDoLayout(w, doit)
- Widget w;
- Boolean doit;
- {
- register FormWidget fw = (FormWidget)w;
-
- fw->form.no_refigure = !doit;
-
- if ( XtIsRealized(w) && fw->form.needs_relayout )
- RefigureLocations( fw );
- }
-