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-rw-r--r--lwlib/lwlib-Xolmb.c370
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diff --git a/lwlib/lwlib-Xolmb.c b/lwlib/lwlib-Xolmb.c
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+/* An OLIT menubar widget, by Chuck Thompson <[email protected]>
+ Copyright (C) 1993 Lucid, Inc.
+
+This file is part of the Lucid Widget Library.
+
+The Lucid Widget Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+The Lucid Widget Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include <X11/IntrinsicP.h>
+#include <X11/Intrinsic.h>
+#include <X11/CompositeP.h>
+#include <X11/Composite.h>
+#include "lwlib-Xol-mbP.h"
+#include "lwlib-Xol-mb.h"
+
+#define HORIZ_SPACING 4
+#define VERT_SPACING 4
+
+static void Initialize();
+static void Resize();
+static void ChangeManaged();
+static Boolean SetValues();
+static XtGeometryResult GeometryManager();
+static XtGeometryResult PreferredSize();
+static void do_layout();
+static XtGeometryResult try_layout();
+
+lwMenuBarClassRec lwMenubarClassRec =
+{
+ {
+ /* core_class members */
+
+ (WidgetClass) &compositeClassRec, /* superclass */
+ "Menubar", /* class_name */
+ sizeof(lwMenuBarRec), /* widget_size */
+ NULL, /* class_initialize */
+ NULL, /* class_part_initialize */
+ FALSE, /* class_inited */
+ Initialize, /* initialize */
+ NULL, /* initialize_hook */
+ XtInheritRealize, /* realize */
+ NULL, /* actions */
+ 0, /* num_actions */
+ NULL, /* resources */
+ 0, /* num_resources */
+ NULLQUARK, /* xrm_class */
+ TRUE, /* compress_motion */
+ XtExposeCompressMaximal, /* compress_exposure */
+ TRUE, /* compress_enterleave */
+ FALSE, /* visible_interest */
+ NULL, /* destroy */
+ Resize, /* resize */
+ NULL, /* expose */
+ NULL, /* 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 */
+ PreferredSize, /* query_geometry */
+ NULL, /* display_accelerator */
+ NULL, /* extension */
+ },
+ {
+ /* composite_class members */
+
+ GeometryManager, /* geometry_manager */
+ ChangeManaged, /* change_managed */
+ XtInheritInsertChild, /* insert_child */
+ XtInheritDeleteChild, /* delete_child */
+ NULL, /* extension */
+ },
+ {
+ /* Menubar class members */
+
+ 0, /* empty */
+ }
+};
+WidgetClass lwMenubarWidgetClass = (WidgetClass) &lwMenubarClassRec;
+
+
+static void Initialize (request, new)
+ lwMenuBarWidget request, new;
+{
+ if (request->core.width <= 0)
+ new->core.width = 1;
+ if (request->core.height <= 0)
+ new->core.height = 23;
+}
+
+static void
+Resize (w)
+ lwMenuBarWidget w;
+{
+ do_layout(w);
+}
+
+static void
+do_layout (parent)
+ lwMenuBarWidget parent;
+{
+ Widget child;
+ int cnt;
+ int managed_children = 0;
+ int managed_width = 0;
+ int new_pos = 0;
+
+ /*
+ * Determine number of children which will fit on one line.
+ * For now we ignore the rest, making sure they are unmanaged.
+ */
+
+ cnt = 0;
+ while ((cnt < (int) parent->composite.num_children) &&
+ (managed_width < (int) parent->core.width))
+ {
+ child = parent->composite.children[cnt++];
+ managed_children++;
+ managed_width += child->core.width + child->core.border_width * 2 +
+ HORIZ_SPACING;
+ }
+
+ if (managed_width > (int) parent->core.width)
+ managed_children--;
+
+ /*
+ * Correct positioning of children.
+ */
+
+ cnt = 0;
+ while (managed_children)
+ {
+ child = parent->composite.children[cnt++];
+
+ if (!child->core.managed)
+ XtManageChild (child);
+
+ if ((child->core.x != new_pos) || (child->core.y != 0))
+ XtMoveWidget (child, new_pos, 0);
+ new_pos += child->core.width + child->core.border_width * 2 +
+ HORIZ_SPACING;
+
+ managed_children--;
+ }
+
+ /*
+ * Make sure all remaining children are unmanaged.
+ */
+
+ while (cnt < parent->composite.num_children)
+ {
+ child = parent->composite.children[cnt];
+
+ if (child->core.managed)
+ XtUnmanageChild (child);
+
+ if ((child->core.x != parent->core.width) ||
+ (child->core.y != parent->core.height))
+ XtMoveWidget (child, parent->core.width, parent->core.height);
+
+ cnt++;
+ }
+}
+
+
+static XtGeometryResult
+PreferredSize (w, request, preferred)
+ lwMenuBarWidget w;
+ XtWidgetGeometry *request, *preferred;
+{
+ Widget child;
+ int cnt;
+
+ /*
+ * If no changes are being made to the width or height, just agree.
+ */
+
+ if (!(request->request_mode & CWWidth) &&
+ !(request->request_mode & CWHeight))
+ return (XtGeometryYes);
+
+ /*
+ * Right now assume everything goes in one row. Calculate the
+ * minimum required width and height.
+ */
+
+ preferred->width = 0;
+ preferred->height = 0;
+
+ for (cnt = 0; cnt < w->composite.num_children; cnt++)
+ {
+ child = w->composite.children[cnt];
+ if (child->core.managed)
+ {
+ preferred->width += child->core.width + child->core.border_width*2 +
+ HORIZ_SPACING;
+ if (preferred->height < (Dimension) (child->core.height +
+ child->core.border_width * 2))
+ preferred->height = child->core.height +
+ child->core.border_width * 2;
+ }
+ }
+
+ preferred->request_mode = CWWidth | CWHeight;
+
+ /*
+ * Case: both height and width requested
+ */
+
+ if ((request->request_mode & CWWidth) &&
+ (request->request_mode & CWHeight))
+ {
+ /*
+ * Ok if same or bigger.
+ */
+
+ if (preferred->width <= request->width &&
+ preferred->height <= request->height)
+ {
+ preferred->width = request->width;
+ return (XtGeometryYes);
+ }
+
+ /*
+ * If both dimensions are too small, say no.
+ */
+
+ else
+ if (preferred->width > request->width &&
+ preferred->height > request->height)
+ return (XtGeometryNo);
+
+ /*
+ * Otherwise one must be right, so say almost.
+ */
+
+ else
+ return (XtGeometryAlmost);
+ }
+
+ /*
+ * If only one dimension is requested, either its OK or it isn't.
+ */
+
+ else
+ {
+ if (request->request_mode & CWWidth)
+ {
+ if (preferred->width <= request->width)
+ {
+ preferred->width = request->width;
+ return (XtGeometryYes);
+ }
+ else
+ return (XtGeometryNo);
+ }
+ else if (request->request_mode & CWHeight)
+ {
+ if (preferred->height <= request->height)
+ {
+ return (XtGeometryYes);
+ }
+ else
+ return (XtGeometryNo);
+ }
+
+ return (XtGeometryYes);
+ }
+}
+
+
+static XtGeometryResult
+GeometryManager (w, request, reply)
+ Widget w;
+ XtWidgetGeometry *request;
+ XtWidgetGeometry *reply;
+{
+
+ lwMenuBarWidget parent = (lwMenuBarWidget) w->core.parent;
+
+ /*
+ * If the widget wants to move, just say no.
+ */
+
+ if ((request->request_mode & CWX && request->x != w->core.x) ||
+ (request->request_mode & CWY && request->y != w->core.y))
+ return (XtGeometryNo);
+
+ /*
+ * Since everything "fits" for now, grant all requests.
+ */
+
+ if (request->request_mode & CWWidth)
+ w->core.width = request->width;
+ if (request->request_mode & CWHeight)
+ w->core.height = request->height;
+ if (request->request_mode & CWBorderWidth)
+ w->core.border_width = request->border_width;
+
+ do_layout (parent);
+ return (XtGeometryYes);
+}
+
+
+static XtGeometryResult
+try_layout (parent)
+ lwMenuBarWidget parent;
+{
+ Widget child;
+ int cnt;
+ int managed_children = 0;
+ int managed_width = 0;
+ int new_pos = 0;
+
+ /*
+ * Determine number of children which will fit on one line.
+ * For now we ignore the rest, making sure they are unmanaged.
+ */
+
+ cnt = 0;
+ while ((cnt < (int) parent->composite.num_children) &&
+ (managed_width < (int) parent->core.width))
+ {
+ child = parent->composite.children[cnt++];
+ if (child->core.managed)
+ {
+ managed_children++;
+ managed_width += child->core.width + child->core.border_width * 2 +
+ HORIZ_SPACING;
+ }
+ }
+
+ if (managed_width > (int) parent->core.width)
+ return (XtGeometryNo);
+ else
+ return (XtGeometryYes);
+}
+
+
+
+static void
+ChangeManaged (w)
+ lwMenuBarWidget w;
+{
+ XtGeometryResult result;
+
+ result = try_layout (w);
+
+ if (result != XtGeometryYes)
+ {
+ XtUnmanageChild (w->composite.children[w->composite.num_children - 1]);
+ XtMoveWidget (w->composite.children[w->composite.num_children-1],
+ w->core.width, w->core.height);
+ }
+
+ do_layout (w);
+}