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emacs/lwlib/xlwmenu.c
1994-01-21 16:52:12 +00:00

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/* Implements a lightweight menubar widget.
Copyright (C) 1992 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 2, 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. */
/* Created by devin@lucid.com */
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <X11/Xos.h>
#include <X11/IntrinsicP.h>
#include <X11/StringDefs.h>
#include <X11/cursorfont.h>
#include <X11/bitmaps/gray>
#include "xlwmenuP.h"
#include <string.h>
static char
xlwMenuTranslations [] =
"<BtnDown>: start()\n\
<BtnMotion>: drag()\n\
<BtnUp>: select()\n\
";
#define offset(field) XtOffset(XlwMenuWidget, field)
static XtResource
xlwMenuResources[] =
{
{XtNfont, XtCFont, XtRFontStruct, sizeof(XFontStruct *),
offset(menu.font),XtRString, "XtDefaultFont"},
{XtNforeground, XtCForeground, XtRPixel, sizeof(Pixel),
offset(menu.foreground), XtRString, "XtDefaultForeground"},
{XtNbuttonForeground, XtCButtonForeground, XtRPixel, sizeof(Pixel),
offset(menu.button_foreground), XtRString, "XtDefaultForeground"},
{XtNmargin, XtCMargin, XtRDimension, sizeof(Dimension),
offset(menu.margin), XtRImmediate, (XtPointer)0},
{XtNhorizontalSpacing, XtCMargin, XtRDimension, sizeof(Dimension),
offset(menu.horizontal_spacing), XtRImmediate, (XtPointer)3},
{XtNverticalSpacing, XtCMargin, XtRDimension, sizeof(Dimension),
offset(menu.vertical_spacing), XtRImmediate, (XtPointer)1},
{XtNarrowSpacing, XtCMargin, XtRDimension, sizeof(Dimension),
offset(menu.arrow_spacing), XtRImmediate, (XtPointer)10},
{XmNshadowThickness, XmCShadowThickness, XmRHorizontalDimension,
sizeof (Dimension), offset (menu.shadow_thickness),
XtRImmediate, (XtPointer) 2},
{XmNtopShadowColor, XmCTopShadowColor, XtRPixel, sizeof (Pixel),
offset (menu.top_shadow_color), XtRImmediate, (XtPointer)-1},
{XmNbottomShadowColor, XmCBottomShadowColor, XtRPixel, sizeof (Pixel),
offset (menu.bottom_shadow_color), XtRImmediate, (XtPointer)-1},
{XmNtopShadowPixmap, XmCTopShadowPixmap, XtRPixmap, sizeof (Pixmap),
offset (menu.top_shadow_pixmap), XtRImmediate, (XtPointer)None},
{XmNbottomShadowPixmap, XmCBottomShadowPixmap, XtRPixmap, sizeof (Pixmap),
offset (menu.bottom_shadow_pixmap), XtRImmediate, (XtPointer)None},
{XtNopen, XtCCallback, XtRCallback, sizeof(XtPointer),
offset(menu.open), XtRCallback, (XtPointer)NULL},
{XtNselect, XtCCallback, XtRCallback, sizeof(XtPointer),
offset(menu.select), XtRCallback, (XtPointer)NULL},
{XtNmenu, XtCMenu, XtRPointer, sizeof(XtPointer),
offset(menu.contents), XtRImmediate, (XtPointer)NULL},
{XtNcursor, XtCCursor, XtRCursor, sizeof(Cursor),
offset(menu.cursor_shape), XtRString, (XtPointer)"right_ptr"},
{XtNhorizontal, XtCHorizontal, XtRInt, sizeof(int),
offset(menu.horizontal), XtRImmediate, (XtPointer)True},
};
#undef offset
static Boolean XlwMenuSetValues();
static void XlwMenuRealize();
static void XlwMenuRedisplay();
static void XlwMenuResize();
static void XlwMenuInitialize();
static void XlwMenuRedisplay();
static void XlwMenuDestroy();
static void XlwMenuClassInitialize();
static void Start();
static void Drag();
static void Select();
static XtActionsRec
xlwMenuActionsList [] =
{
{"start", Start},
{"drag", Drag},
{"select", Select},
};
#define SuperClass ((CoreWidgetClass)&coreClassRec)
XlwMenuClassRec xlwMenuClassRec =
{
{ /* CoreClass fields initialization */
(WidgetClass) SuperClass, /* superclass */
"XlwMenu", /* class_name */
sizeof(XlwMenuRec), /* size */
XlwMenuClassInitialize, /* class_initialize */
NULL, /* class_part_initialize */
FALSE, /* class_inited */
XlwMenuInitialize, /* initialize */
NULL, /* initialize_hook */
XlwMenuRealize, /* realize */
xlwMenuActionsList, /* actions */
XtNumber(xlwMenuActionsList), /* num_actions */
xlwMenuResources, /* resources */
XtNumber(xlwMenuResources), /* resource_count */
NULLQUARK, /* xrm_class */
TRUE, /* compress_motion */
TRUE, /* compress_exposure */
TRUE, /* compress_enterleave */
FALSE, /* visible_interest */
XlwMenuDestroy, /* destroy */
XlwMenuResize, /* resize */
XlwMenuRedisplay, /* expose */
XlwMenuSetValues, /* set_values */
NULL, /* set_values_hook */
XtInheritSetValuesAlmost, /* set_values_almost */
NULL, /* get_values_hook */
NULL, /* accept_focus */
XtVersion, /* version */
NULL, /* callback_private */
xlwMenuTranslations, /* tm_table */
XtInheritQueryGeometry, /* query_geometry */
XtInheritDisplayAccelerator, /* display_accelerator */
NULL /* extension */
}, /* XlwMenuClass fields initialization */
{
0 /* dummy */
},
};
WidgetClass xlwMenuWidgetClass = (WidgetClass) &xlwMenuClassRec;
/* Utilities */
static void
push_new_stack (XlwMenuWidget mw, widget_value* val)
{
if (!mw->menu.new_stack)
{
mw->menu.new_stack_length = 10;
mw->menu.new_stack =
(widget_value**)XtCalloc (mw->menu.new_stack_length,
sizeof (widget_value*));
}
else if (mw->menu.new_depth == mw->menu.new_stack_length)
{
mw->menu.new_stack_length *= 2;
mw->menu.new_stack =
(widget_value**)XtRealloc ((char*)mw->menu.new_stack,
mw->menu.new_stack_length * sizeof (widget_value*));
}
mw->menu.new_stack [mw->menu.new_depth++] = val;
}
static void
pop_new_stack_if_no_contents (XlwMenuWidget mw)
{
if (mw->menu.new_depth)
{
if (!mw->menu.new_stack [mw->menu.new_depth - 1]->contents)
mw->menu.new_depth -= 1;
}
}
static void
make_old_stack_space (XlwMenuWidget mw, int n)
{
if (!mw->menu.old_stack)
{
mw->menu.old_stack_length = 10;
mw->menu.old_stack =
(widget_value**)XtCalloc (mw->menu.old_stack_length,
sizeof (widget_value*));
}
else if (mw->menu.old_stack_length < n)
{
mw->menu.old_stack_length *= 2;
mw->menu.old_stack =
(widget_value**)XtRealloc ((char*)mw->menu.old_stack,
mw->menu.old_stack_length * sizeof (widget_value*));
}
}
/* Size code */
static Boolean
all_dashes_p (char* s)
{
char* p;
for (p = s; *p == '-'; p++);
return !*p;
}
static int
string_width (XlwMenuWidget mw, char* s)
{
XCharStruct xcs;
int drop;
XTextExtents (mw->menu.font, s, strlen (s), &drop, &drop, &drop, &xcs);
return xcs.width;
}
static int
arrow_width (XlwMenuWidget mw)
{
return mw->menu.font->ascent / 2 | 1;
}
static XtResource
nameResource[] =
{
{"labelString", "LabelString", XtRString, sizeof(String),
0, XtRImmediate, 0},
};
static char*
resource_widget_value (XlwMenuWidget mw, widget_value* val)
{
if (!val->toolkit_data)
{
char* resourced_name = NULL;
char* complete_name;
XtGetSubresources ((Widget) mw,
(XtPointer) &resourced_name,
val->name, val->name,
nameResource, 1, NULL, 0);
if (!resourced_name)
resourced_name = val->name;
if (!val->value)
{
complete_name = (char *) XtMalloc (strlen (resourced_name) + 1);
strcpy (complete_name, resourced_name);
}
else
{
int complete_length =
strlen (resourced_name) + strlen (val->value) + 2;
complete_name = XtMalloc (complete_length);
*complete_name = 0;
strcat (complete_name, resourced_name);
strcat (complete_name, " ");
strcat (complete_name, val->value);
}
val->toolkit_data = complete_name;
val->free_toolkit_data = True;
}
return (char*)val->toolkit_data;
}
/* Returns the sizes of an item */
static void
size_menu_item (XlwMenuWidget mw, widget_value* val, int horizontal_p,
int* label_width, int* rest_width, int* height)
{
if (all_dashes_p (val->name))
{
*height = 2;
*label_width = 1;
*rest_width = 0;
}
else
{
*height =
mw->menu.font->ascent + mw->menu.font->descent
+ 2 * mw->menu.vertical_spacing + 2 * mw->menu.shadow_thickness;
*label_width =
string_width (mw, resource_widget_value (mw, val))
+ mw->menu.horizontal_spacing + mw->menu.shadow_thickness;
*rest_width = mw->menu.horizontal_spacing + mw->menu.shadow_thickness;
if (!horizontal_p)
{
if (val->contents)
*rest_width += arrow_width (mw) + mw->menu.arrow_spacing;
else if (val->key)
*rest_width +=
string_width (mw, val->key) + mw->menu.arrow_spacing;
}
}
}
static void
size_menu (XlwMenuWidget mw, int level)
{
int label_width = 0;
int rest_width = 0;
int max_rest_width = 0;
int height = 0;
int horizontal_p = mw->menu.horizontal && (level == 0);
widget_value* val;
window_state* ws;
if (level >= mw->menu.old_depth)
abort ();
ws = &mw->menu.windows [level];
ws->width = 0;
ws->height = 0;
ws->label_width = 0;
for (val = mw->menu.old_stack [level]->contents; val; val = val->next)
{
size_menu_item (mw, val, horizontal_p, &label_width, &rest_width,
&height);
if (horizontal_p)
{
ws->width += label_width + rest_width;
if (height > ws->height)
ws->height = height;
}
else
{
if (label_width > ws->label_width)
ws->label_width = label_width;
if (rest_width > max_rest_width)
max_rest_width = rest_width;
ws->height += height;
}
}
if (horizontal_p)
ws->label_width = 0;
else
ws->width = ws->label_width + max_rest_width;
ws->width += 2 * mw->menu.shadow_thickness;
ws->height += 2 * mw->menu.shadow_thickness;
}
/* Display code */
static void
draw_arrow (XlwMenuWidget mw, Window window, GC gc, int x, int y, int width)
{
XPoint points [3];
points [0].x = x;
points [0].y = y + mw->menu.font->ascent;
points [1].x = x;
points [1].y = y;
points [2].x = x + width;
points [2].y = y + mw->menu.font->ascent / 2;
XFillPolygon (XtDisplay (mw), window, gc, points, 3, Convex,
CoordModeOrigin);
}
static void
draw_shadow_rectangle (XlwMenuWidget mw, Window window,
int x, int y, int width, int height, int erase_p)
{
Display *dpy = XtDisplay (mw);
GC top_gc = !erase_p ? mw->menu.shadow_top_gc : mw->menu.background_gc;
GC bottom_gc = !erase_p ? mw->menu.shadow_bottom_gc : mw->menu.background_gc;
int thickness = mw->menu.shadow_thickness;
XPoint points [4];
points [0].x = x;
points [0].y = y;
points [1].x = x + width;
points [1].y = y;
points [2].x = x + width - thickness;
points [2].y = y + thickness;
points [3].x = x;
points [3].y = y + thickness;
XFillPolygon (dpy, window, top_gc, points, 4, Convex, CoordModeOrigin);
points [0].x = x;
points [0].y = y + thickness;
points [1].x = x;
points [1].y = y + height;
points [2].x = x + thickness;
points [2].y = y + height - thickness;
points [3].x = x + thickness;
points [3].y = y + thickness;
XFillPolygon (dpy, window, top_gc, points, 4, Convex, CoordModeOrigin);
points [0].x = x + width;
points [0].y = y;
points [1].x = x + width - thickness;
points [1].y = y + thickness;
points [2].x = x + width - thickness;
points [2].y = y + height - thickness;
points [3].x = x + width;
points [3].y = y + height - thickness;
XFillPolygon (dpy, window, bottom_gc, points, 4, Convex, CoordModeOrigin);
points [0].x = x;
points [0].y = y + height;
points [1].x = x + width;
points [1].y = y + height;
points [2].x = x + width;
points [2].y = y + height - thickness;
points [3].x = x + thickness;
points [3].y = y + height - thickness;
XFillPolygon (dpy, window, bottom_gc, points, 4, Convex, CoordModeOrigin);
}
/* Display the menu item and increment where.x and where.y to show how large
** the menu item was.
*/
static void
display_menu_item (XlwMenuWidget mw, widget_value* val, window_state* ws,
XPoint* where, Boolean highlighted_p, Boolean horizontal_p,
Boolean just_compute_p)
{
GC deco_gc;
GC text_gc;
int font_ascent = mw->menu.font->ascent;
int font_descent = mw->menu.font->descent;
int shadow = mw->menu.shadow_thickness;
int separator_p = all_dashes_p (val->name);
int h_spacing = mw->menu.horizontal_spacing;
int v_spacing = mw->menu.vertical_spacing;
int label_width;
int rest_width;
int height;
int width;
int button_p;
/* compute the sizes of the item */
size_menu_item (mw, val, horizontal_p, &label_width, &rest_width, &height);
if (horizontal_p)
width = label_width + rest_width;
else
{
label_width = ws->label_width;
width = ws->width - 2 * shadow;
}
/* see if it should be a button in the menubar */
button_p = horizontal_p && val->call_data;
/* Only highlight an enabled item that has a callback. */
if (highlighted_p)
if (!val->enabled || !(val->call_data || val->contents))
highlighted_p = 0;
/* do the drawing. */
if (!just_compute_p)
{
/* Add the shadow border of the containing menu */
int x = where->x + shadow;
int y = where->y + shadow;
/* pick the foreground and background GC. */
if (val->enabled)
text_gc = button_p ? mw->menu.button_gc : mw->menu.foreground_gc;
else
text_gc =
button_p ? mw->menu.inactive_button_gc : mw->menu.inactive_gc;
deco_gc = mw->menu.foreground_gc;
if (separator_p)
{
XDrawLine (XtDisplay (mw), ws->window, mw->menu.shadow_bottom_gc,
x, y, x + width, y);
XDrawLine (XtDisplay (mw), ws->window, mw->menu.shadow_top_gc,
x, y + 1, x + width, y + 1);
}
else
{
char* display_string = resource_widget_value (mw, val);
draw_shadow_rectangle (mw, ws->window, x, y, width, height, True);
XDrawString (XtDisplay (mw), ws->window, text_gc,
x + h_spacing + shadow,
y + v_spacing + shadow + font_ascent,
display_string, strlen (display_string));
if (!horizontal_p)
{
if (val->contents)
{
int a_w = arrow_width (mw);
draw_arrow (mw, ws->window, deco_gc,
x + label_width + mw->menu.arrow_spacing,
y + v_spacing + shadow, a_w);
}
else if (val->key)
{
XDrawString (XtDisplay (mw), ws->window, text_gc,
x + label_width + mw->menu.arrow_spacing,
y + v_spacing + shadow + font_ascent,
val->key, strlen (val->key));
}
}
else if (button_p)
{
#if 1
XDrawRectangle (XtDisplay (mw), ws->window, deco_gc,
x + shadow, y + shadow,
label_width + h_spacing - 1,
font_ascent + font_descent + 2 * v_spacing - 1);
#else
highlighted_p = True;
#endif
}
if (highlighted_p)
draw_shadow_rectangle (mw, ws->window, x, y, width, height, False);
}
}
where->x += width;
where->y += height;
}
static void
display_menu (XlwMenuWidget mw, int level, Boolean just_compute_p,
XPoint* highlighted_pos, XPoint* hit, widget_value** hit_return,
widget_value* this, widget_value* that)
{
widget_value* val;
widget_value* following_item;
window_state* ws;
XPoint where;
int horizontal_p = mw->menu.horizontal && (level == 0);
int highlighted_p;
int just_compute_this_one_p;
if (level >= mw->menu.old_depth)
abort ();
if (level < mw->menu.old_depth - 1)
following_item = mw->menu.old_stack [level + 1];
else
following_item = NULL;
if (hit)
*hit_return = NULL;
where.x = 0;
where.y = 0;
ws = &mw->menu.windows [level];
for (val = mw->menu.old_stack [level]->contents; val; val = val->next)
{
highlighted_p = val == following_item;
if (highlighted_p && highlighted_pos)
{
if (horizontal_p)
highlighted_pos->x = where.x;
else
highlighted_pos->y = where.y;
}
just_compute_this_one_p =
just_compute_p || ((this || that) && val != this && val != that);
display_menu_item (mw, val, ws, &where, highlighted_p, horizontal_p,
just_compute_this_one_p);
if (highlighted_p && highlighted_pos)
{
if (horizontal_p)
highlighted_pos->y = where.y;
else
highlighted_pos->x = where.x;
}
if (hit
&& !*hit_return
&& (horizontal_p ? hit->x < where.x : hit->y < where.y)
&& !all_dashes_p (val->name))
*hit_return = val;
if (horizontal_p)
where.y = 0;
else
where.x = 0;
}
if (!just_compute_p)
draw_shadow_rectangle (mw, ws->window, 0, 0, ws->width, ws->height, False);
}
/* Motion code */
static void
set_new_state (XlwMenuWidget mw, widget_value* val, int level)
{
int i;
mw->menu.new_depth = 0;
for (i = 0; i < level; i++)
push_new_stack (mw, mw->menu.old_stack [i]);
push_new_stack (mw, val);
}
static void
make_windows_if_needed (XlwMenuWidget mw, int n)
{
int i;
int start_at;
XSetWindowAttributes xswa;
int mask;
Window root = RootWindowOfScreen (DefaultScreenOfDisplay (XtDisplay (mw)));
window_state* windows;
if (mw->menu.windows_length >= n)
return;
xswa.save_under = True;
xswa.override_redirect = True;
xswa.background_pixel = mw->core.background_pixel;
xswa.border_pixel = mw->core.border_pixel;
xswa.event_mask =
ExposureMask | ButtonMotionMask | PointerMotionHintMask
| ButtonReleaseMask | ButtonPressMask;
xswa.cursor = mw->menu.cursor_shape;
mask = CWSaveUnder | CWOverrideRedirect | CWBackPixel | CWBorderPixel
| CWEventMask | CWCursor;
if (!mw->menu.windows)
{
mw->menu.windows =
(window_state*)XtMalloc (n * sizeof (window_state));
start_at = 0;
}
else
{
mw->menu.windows =
(window_state*)XtRealloc ((char*)mw->menu.windows,
n * sizeof (window_state));
start_at = mw->menu.windows_length;
}
mw->menu.windows_length = n;
windows = mw->menu.windows;
for (i = start_at; i < n; i++)
{
windows [i].x = 0;
windows [i].y = 0;
windows [i].width = 1;
windows [i].height = 1;
windows [i].window =
XCreateWindow (XtDisplay (mw), root, 0, 0, 1, 1,
0, 0, CopyFromParent, CopyFromParent, mask, &xswa);
}
}
/* Make the window fit in the screen */
static void
fit_to_screen (XlwMenuWidget mw, window_state* ws, window_state* previous_ws,
Boolean horizontal_p)
{
int screen_width = WidthOfScreen (XtScreen (mw));
int screen_height = HeightOfScreen (XtScreen (mw));
if (ws->x < 0)
ws->x = 0;
else if (ws->x + ws->width > screen_width)
{
if (!horizontal_p)
ws->x = previous_ws->x - ws->width;
else
ws->x = screen_width - ws->width;
}
if (ws->y < 0)
ws->y = 0;
else if (ws->y + ws->height > screen_height)
{
if (horizontal_p)
ws->y = previous_ws->y - ws->height;
else
ws->y = screen_height - ws->height;
}
}
/* Updates old_stack from new_stack and redisplays. */
static void
remap_menubar (XlwMenuWidget mw)
{
int i;
int last_same;
XPoint selection_position;
int old_depth = mw->menu.old_depth;
int new_depth = mw->menu.new_depth;
widget_value** old_stack;
widget_value** new_stack;
window_state* windows;
widget_value* old_selection;
widget_value* new_selection;
/* Check that enough windows and old_stack are ready. */
make_windows_if_needed (mw, new_depth);
make_old_stack_space (mw, new_depth);
windows = mw->menu.windows;
old_stack = mw->menu.old_stack;
new_stack = mw->menu.new_stack;
/* compute the last identical different entry */
for (i = 1; i < old_depth && i < new_depth; i++)
if (old_stack [i] != new_stack [i])
break;
last_same = i - 1;
/* Memorize the previously selected item to be able to refresh it */
old_selection = last_same + 1 < old_depth ? old_stack [last_same + 1] : NULL;
if (old_selection && !old_selection->enabled)
old_selection = NULL;
new_selection = last_same + 1 < new_depth ? new_stack [last_same + 1] : NULL;
if (new_selection && !new_selection->enabled)
new_selection = NULL;
/* updates old_state from new_state. It has to be done now because
display_menu (called below) uses the old_stack to know what to display. */
for (i = last_same + 1; i < new_depth; i++)
old_stack [i] = new_stack [i];
mw->menu.old_depth = new_depth;
/* refresh the last seletion */
selection_position.x = 0;
selection_position.y = 0;
display_menu (mw, last_same, new_selection == old_selection,
&selection_position, NULL, NULL, old_selection, new_selection);
/* Now popup the new menus */
for (i = last_same + 1; i < new_depth && new_stack [i]->contents; i++)
{
window_state* previous_ws = &windows [i - 1];
window_state* ws = &windows [i];
ws->x =
previous_ws->x + selection_position.x + mw->menu.shadow_thickness;
if (!mw->menu.horizontal || i > 1)
ws->x += mw->menu.shadow_thickness;
ws->y =
previous_ws->y + selection_position.y + mw->menu.shadow_thickness;
size_menu (mw, i);
fit_to_screen (mw, ws, previous_ws, mw->menu.horizontal && i == 1);
XClearWindow (XtDisplay (mw), ws->window);
XMoveResizeWindow (XtDisplay (mw), ws->window, ws->x, ws->y,
ws->width, ws->height);
XMapRaised (XtDisplay (mw), ws->window);
display_menu (mw, i, False, &selection_position, NULL, NULL, NULL, NULL);
}
/* unmap the menus that popped down */
for (i = new_depth - 1; i < old_depth; i++)
if (i >= new_depth || !new_stack [i]->contents)
XUnmapWindow (XtDisplay (mw), windows [i].window);
}
static Boolean
motion_event_is_in_menu (XlwMenuWidget mw, XMotionEvent* ev, int level,
XPoint* relative_pos)
{
window_state* ws = &mw->menu.windows [level];
int x = level == 0 ? ws->x : ws->x + mw->menu.shadow_thickness;
int y = level == 0 ? ws->y : ws->y + mw->menu.shadow_thickness;
relative_pos->x = ev->x_root - x;
relative_pos->y = ev->y_root - y;
return (x < ev->x_root && ev->x_root < x + ws->width
&& y < ev->y_root && ev->y_root < y + ws->height);
}
static Boolean
map_event_to_widget_value (XlwMenuWidget mw, XMotionEvent* ev,
widget_value** val, int* level)
{
int i;
XPoint relative_pos;
window_state* ws;
*val = NULL;
/* Find the window */
for (i = mw->menu.old_depth - 1; i >= 0; i--)
{
ws = &mw->menu.windows [i];
if (ws && motion_event_is_in_menu (mw, ev, i, &relative_pos))
{
display_menu (mw, i, True, NULL, &relative_pos, val, NULL, NULL);
if (*val)
{
*level = i + 1;
return True;
}
}
}
return False;
}
/* Procedures */
static void
make_drawing_gcs (XlwMenuWidget mw)
{
XGCValues xgcv;
xgcv.font = mw->menu.font->fid;
xgcv.foreground = mw->menu.foreground;
xgcv.background = mw->core.background_pixel;
mw->menu.foreground_gc = XtGetGC ((Widget)mw,
GCFont | GCForeground | GCBackground,
&xgcv);
xgcv.font = mw->menu.font->fid;
xgcv.foreground = mw->menu.button_foreground;
xgcv.background = mw->core.background_pixel;
mw->menu.button_gc = XtGetGC ((Widget)mw,
GCFont | GCForeground | GCBackground,
&xgcv);
xgcv.font = mw->menu.font->fid;
xgcv.foreground = mw->menu.foreground;
xgcv.background = mw->core.background_pixel;
xgcv.fill_style = FillStippled;
xgcv.stipple = mw->menu.gray_pixmap;
mw->menu.inactive_gc = XtGetGC ((Widget)mw,
(GCFont | GCForeground | GCBackground
| GCFillStyle | GCStipple), &xgcv);
xgcv.font = mw->menu.font->fid;
xgcv.foreground = mw->menu.button_foreground;
xgcv.background = mw->core.background_pixel;
xgcv.fill_style = FillStippled;
xgcv.stipple = mw->menu.gray_pixmap;
mw->menu.inactive_button_gc = XtGetGC ((Widget)mw,
(GCFont | GCForeground | GCBackground
| GCFillStyle | GCStipple), &xgcv);
xgcv.font = mw->menu.font->fid;
xgcv.foreground = mw->core.background_pixel;
xgcv.background = mw->menu.foreground;
mw->menu.background_gc = XtGetGC ((Widget)mw,
GCFont | GCForeground | GCBackground,
&xgcv);
}
static void
release_drawing_gcs (XlwMenuWidget mw)
{
XtReleaseGC ((Widget) mw, mw->menu.foreground_gc);
XtReleaseGC ((Widget) mw, mw->menu.button_gc);
XtReleaseGC ((Widget) mw, mw->menu.inactive_gc);
XtReleaseGC ((Widget) mw, mw->menu.inactive_button_gc);
XtReleaseGC ((Widget) mw, mw->menu.background_gc);
/* let's get some segvs if we try to use these... */
mw->menu.foreground_gc = (GC) -1;
mw->menu.button_gc = (GC) -1;
mw->menu.inactive_gc = (GC) -1;
mw->menu.inactive_button_gc = (GC) -1;
mw->menu.background_gc = (GC) -1;
}
#define MINL(x,y) ((((unsigned long) (x)) < ((unsigned long) (y))) \
? ((unsigned long) (x)) : ((unsigned long) (y)))
static void
make_shadow_gcs (XlwMenuWidget mw)
{
XGCValues xgcv;
unsigned long pm = 0;
Display *dpy = XtDisplay ((Widget) mw);
Colormap cmap = DefaultColormapOfScreen (XtScreen ((Widget) mw));
XColor topc, botc;
int top_frobbed = 0, bottom_frobbed = 0;
if (mw->menu.top_shadow_color == -1)
mw->menu.top_shadow_color = mw->core.background_pixel;
if (mw->menu.bottom_shadow_color == -1)
mw->menu.bottom_shadow_color = mw->menu.foreground;
if (mw->menu.top_shadow_color == mw->core.background_pixel ||
mw->menu.top_shadow_color == mw->menu.foreground)
{
topc.pixel = mw->core.background_pixel;
XQueryColor (dpy, cmap, &topc);
/* don't overflow/wrap! */
topc.red = MINL (65535, topc.red * 1.2);
topc.green = MINL (65535, topc.green * 1.2);
topc.blue = MINL (65535, topc.blue * 1.2);
if (XAllocColor (dpy, cmap, &topc))
{
mw->menu.top_shadow_color = topc.pixel;
top_frobbed = 1;
}
}
if (mw->menu.bottom_shadow_color == mw->menu.foreground ||
mw->menu.bottom_shadow_color == mw->core.background_pixel)
{
botc.pixel = mw->core.background_pixel;
XQueryColor (dpy, cmap, &botc);
botc.red *= 0.6;
botc.green *= 0.6;
botc.blue *= 0.6;
if (XAllocColor (dpy, cmap, &botc))
{
mw->menu.bottom_shadow_color = botc.pixel;
bottom_frobbed = 1;
}
}
if (top_frobbed && bottom_frobbed)
{
int top_avg = ((topc.red / 3) + (topc.green / 3) + (topc.blue / 3));
int bot_avg = ((botc.red / 3) + (botc.green / 3) + (botc.blue / 3));
if (bot_avg > top_avg)
{
Pixel tmp = mw->menu.top_shadow_color;
mw->menu.top_shadow_color = mw->menu.bottom_shadow_color;
mw->menu.bottom_shadow_color = tmp;
}
else if (topc.pixel == botc.pixel)
{
if (botc.pixel == mw->menu.foreground)
mw->menu.top_shadow_color = mw->core.background_pixel;
else
mw->menu.bottom_shadow_color = mw->menu.foreground;
}
}
if (!mw->menu.top_shadow_pixmap &&
mw->menu.top_shadow_color == mw->core.background_pixel)
{
mw->menu.top_shadow_pixmap = mw->menu.gray_pixmap;
mw->menu.top_shadow_color = mw->menu.foreground;
}
if (!mw->menu.bottom_shadow_pixmap &&
mw->menu.bottom_shadow_color == mw->core.background_pixel)
{
mw->menu.bottom_shadow_pixmap = mw->menu.gray_pixmap;
mw->menu.bottom_shadow_color = mw->menu.foreground;
}
xgcv.fill_style = FillStippled;
xgcv.foreground = mw->menu.top_shadow_color;
xgcv.stipple = mw->menu.top_shadow_pixmap;
pm = (xgcv.stipple ? GCStipple|GCFillStyle : 0);
mw->menu.shadow_top_gc = XtGetGC ((Widget)mw, GCForeground | pm, &xgcv);
xgcv.foreground = mw->menu.bottom_shadow_color;
xgcv.stipple = mw->menu.bottom_shadow_pixmap;
pm = (xgcv.stipple ? GCStipple|GCFillStyle : 0);
mw->menu.shadow_bottom_gc = XtGetGC ((Widget)mw, GCForeground | pm, &xgcv);
}
static void
release_shadow_gcs (XlwMenuWidget mw)
{
XtReleaseGC ((Widget) mw, mw->menu.shadow_top_gc);
XtReleaseGC ((Widget) mw, mw->menu.shadow_bottom_gc);
}
static void
XlwMenuInitialize (Widget request, Widget new, ArgList args,
Cardinal *num_args)
{
/* Get the GCs and the widget size */
XlwMenuWidget mw = (XlwMenuWidget)new;
XSetWindowAttributes xswa;
int mask;
Window window = RootWindowOfScreen (DefaultScreenOfDisplay (XtDisplay (mw)));
Display* display = XtDisplay (mw);
/* mw->menu.cursor = XCreateFontCursor (display, mw->menu.cursor_shape); */
mw->menu.cursor = mw->menu.cursor_shape;
mw->menu.gray_pixmap = XCreatePixmapFromBitmapData (display, window,
gray_bits, gray_width,
gray_height, 1, 0, 1);
make_drawing_gcs (mw);
make_shadow_gcs (mw);
xswa.background_pixel = mw->core.background_pixel;
xswa.border_pixel = mw->core.border_pixel;
mask = CWBackPixel | CWBorderPixel;
mw->menu.popped_up = False;
mw->menu.old_depth = 1;
mw->menu.old_stack = (widget_value**)XtMalloc (sizeof (widget_value*));
mw->menu.old_stack_length = 1;
mw->menu.old_stack [0] = mw->menu.contents;
mw->menu.new_depth = 0;
mw->menu.new_stack = 0;
mw->menu.new_stack_length = 0;
push_new_stack (mw, mw->menu.contents);
mw->menu.windows = (window_state*)XtMalloc (sizeof (window_state));
mw->menu.windows_length = 1;
mw->menu.windows [0].x = 0;
mw->menu.windows [0].y = 0;
mw->menu.windows [0].width = 0;
mw->menu.windows [0].height = 0;
size_menu (mw, 0);
mw->core.width = mw->menu.windows [0].width;
mw->core.height = mw->menu.windows [0].height;
}
static void
XlwMenuClassInitialize ()
{
}
static void
XlwMenuRealize (Widget w, Mask *valueMask, XSetWindowAttributes *attributes)
{
XlwMenuWidget mw = (XlwMenuWidget)w;
XSetWindowAttributes xswa;
int mask;
(*xlwMenuWidgetClass->core_class.superclass->core_class.realize)
(w, valueMask, attributes);
xswa.save_under = True;
xswa.cursor = mw->menu.cursor_shape;
mask = CWSaveUnder | CWCursor;
XChangeWindowAttributes (XtDisplay (w), XtWindow (w), mask, &xswa);
mw->menu.windows [0].window = XtWindow (w);
mw->menu.windows [0].x = w->core.x;
mw->menu.windows [0].y = w->core.y;
mw->menu.windows [0].width = w->core.width;
mw->menu.windows [0].height = w->core.height;
}
/* Only the toplevel menubar/popup is a widget so it's the only one that
receives expose events through Xt. So we repaint all the other panes
when receiving an Expose event. */
static void
XlwMenuRedisplay (Widget w, XEvent* ev, Region region)
{
XlwMenuWidget mw = (XlwMenuWidget)w;
int i;
for (i = 0; i < mw->menu.old_depth; i++)
display_menu (mw, i, False, NULL, NULL, NULL, NULL, NULL);
}
static void
XlwMenuDestroy (Widget w)
{
int i;
XlwMenuWidget mw = (XlwMenuWidget) w;
release_drawing_gcs (mw);
release_shadow_gcs (mw);
/* this doesn't come from the resource db but is created explicitly
so we must free it ourselves. */
XFreePixmap (XtDisplay (mw), mw->menu.gray_pixmap);
mw->menu.gray_pixmap = (Pixmap) -1;
/* Don't free mw->menu.contents because that comes from our creator.
The `*_stack' elements are just pointers into `contents' so leave
that alone too. But free the stacks themselves. */
if (mw->menu.old_stack) XtFree ((char *) mw->menu.old_stack);
if (mw->menu.new_stack) XtFree ((char *) mw->menu.new_stack);
/* Remember, you can't free anything that came from the resource
database. This includes:
mw->menu.cursor
mw->menu.top_shadow_pixmap
mw->menu.bottom_shadow_pixmap
mw->menu.font
Also the color cells of top_shadow_color, bottom_shadow_color,
foreground, and button_foreground will never be freed until this
client exits. Nice, eh?
*/
/* start from 1 because the one in slot 0 is w->core.window */
for (i = 1; i < mw->menu.windows_length; i++)
XDestroyWindow (XtDisplay (mw), mw->menu.windows [i].window);
if (mw->menu.windows)
XtFree ((char *) mw->menu.windows);
}
static Boolean
XlwMenuSetValues (Widget current, Widget request, Widget new)
{
XlwMenuWidget oldmw = (XlwMenuWidget)current;
XlwMenuWidget newmw = (XlwMenuWidget)new;
Boolean redisplay = False;
int i;
if (newmw->menu.contents
&& newmw->menu.contents->contents
&& newmw->menu.contents->contents->change >= VISIBLE_CHANGE)
redisplay = True;
if (newmw->core.background_pixel != oldmw->core.background_pixel
|| newmw->menu.foreground != oldmw->menu.foreground)
{
release_drawing_gcs (newmw);
make_drawing_gcs (newmw);
redisplay = True;
for (i = 0; i < oldmw->menu.windows_length; i++)
{
XSetWindowBackground (XtDisplay (oldmw),
oldmw->menu.windows [i].window,
newmw->core.background_pixel);
/* clear windows and generate expose events */
XClearArea (XtDisplay (oldmw), oldmw->menu.windows[i].window,
0, 0, 0, 0, True);
}
}
return redisplay;
}
static void
XlwMenuResize (Widget w)
{
XlwMenuWidget mw = (XlwMenuWidget)w;
mw->menu.windows [0].width = mw->core.width;
mw->menu.windows [0].height = mw->core.height;
}
/* Action procedures */
static void
handle_single_motion_event (XlwMenuWidget mw, XMotionEvent* ev)
{
widget_value* val;
int level;
if (!map_event_to_widget_value (mw, ev, &val, &level))
pop_new_stack_if_no_contents (mw);
else
set_new_state (mw, val, level);
remap_menubar (mw);
/* Sync with the display. Makes it feel better on X terms. */
XSync (XtDisplay (mw), False);
}
static void
handle_motion_event (XlwMenuWidget mw, XMotionEvent* ev)
{
int x = ev->x_root;
int y = ev->y_root;
int state = ev->state;
handle_single_motion_event (mw, ev);
/* allow motion events to be generated again */
if (ev->is_hint
&& XQueryPointer (XtDisplay (mw), ev->window,
&ev->root, &ev->subwindow,
&ev->x_root, &ev->y_root,
&ev->x, &ev->y,
&ev->state)
&& ev->state == state
&& (ev->x_root != x || ev->y_root != y))
handle_single_motion_event (mw, ev);
}
static void
Start (Widget w, XEvent *ev, String *params, Cardinal *num_params)
{
XlwMenuWidget mw = (XlwMenuWidget)w;
XtCallCallbackList ((Widget)mw, mw->menu.open, NULL);
/* notes the absolute position of the menubar window */
mw->menu.windows [0].x = ev->xmotion.x_root - ev->xmotion.x;
mw->menu.windows [0].y = ev->xmotion.y_root - ev->xmotion.y;
/* handles the down like a move, slots are compatible */
handle_motion_event (mw, &ev->xmotion);
}
static void
Drag (Widget w, XEvent *ev, String *params, Cardinal *num_params)
{
XlwMenuWidget mw = (XlwMenuWidget)w;
handle_motion_event (mw, &ev->xmotion);
}
static void
Select (Widget w, XEvent *ev, String *params, Cardinal *num_params)
{
XlwMenuWidget mw = (XlwMenuWidget)w;
widget_value* selected_item = mw->menu.old_stack [mw->menu.old_depth - 1];
/* pop down everything */
mw->menu.new_depth = 1;
remap_menubar (mw);
if (mw->menu.popped_up)
{
mw->menu.popped_up = False;
XtUngrabPointer ((Widget)mw, ev->xmotion.time);
XtPopdown (XtParent (mw));
}
/* callback */
XtCallCallbackList ((Widget)mw, mw->menu.select, (XtPointer)selected_item);
}
/* Special code to pop-up a menu */
void
pop_up_menu (XlwMenuWidget mw, XButtonPressedEvent* event)
{
int x = event->x_root;
int y = event->y_root;
int w;
int h;
int borderwidth = mw->menu.shadow_thickness;
Screen* screen = XtScreen (mw);
XtCallCallbackList ((Widget)mw, mw->menu.open, NULL);
size_menu (mw, 0);
w = mw->menu.windows [0].width;
h = mw->menu.windows [0].height;
x -= borderwidth;
y -= borderwidth;
if (x < borderwidth)
x = borderwidth;
if (x + w + 2 * borderwidth > WidthOfScreen (screen))
x = WidthOfScreen (screen) - w - 2 * borderwidth;
if (y < borderwidth)
y = borderwidth;
if (y + h + 2 * borderwidth> HeightOfScreen (screen))
y = HeightOfScreen (screen) - h - 2 * borderwidth;
mw->menu.popped_up = True;
XtConfigureWidget (XtParent (mw), x, y, w, h,
XtParent (mw)->core.border_width);
XtPopup (XtParent (mw), XtGrabExclusive);
display_menu (mw, 0, False, NULL, NULL, NULL, NULL, NULL);
XtGrabPointer ((Widget)mw, False,
(ButtonMotionMask | PointerMotionHintMask | ButtonReleaseMask
| ButtonPressMask),
GrabModeAsync, GrabModeAsync, None, mw->menu.cursor_shape,
event->time);
mw->menu.windows [0].x = x + borderwidth;
mw->menu.windows [0].y = y + borderwidth;
handle_motion_event (mw, (XMotionEvent*)event);
}