From a42ded75e297cedfcb448537e77d13350df0fe92 Mon Sep 17 00:00:00 2001
From: Michael R Sweet <michael.r.sweet@gmail.com>
Date: Tue, 23 Nov 2004 19:47:52 +0000
Subject: Added the 2.0 Fl_Widget::copy_label() method to allow FLTK 1.x
 applications to have their label strings managed by FLTK (STR #630)

Added Fl::delete_widget() method to safely delete widgets in
callback methods (STR #629)


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@3917 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl.cxx        | 48 ++++++++++++++++++++++++++++++++++++++++++++++--
 src/Fl_Widget.cxx | 26 ++++++++++++++++++++++++--
 2 files changed, 70 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/Fl.cxx b/src/Fl.cxx
index f66f63c4b..a25009101 100644
--- a/src/Fl.cxx
+++ b/src/Fl.cxx
@@ -1,5 +1,5 @@
 //
-// "$Id: Fl.cxx,v 1.24.2.41.2.69 2004/11/23 19:09:55 easysw Exp $"
+// "$Id: Fl.cxx,v 1.24.2.41.2.70 2004/11/23 19:47:51 easysw Exp $"
 //
 // Main event handling code for the Fast Light Tool Kit (FLTK).
 //
@@ -236,6 +236,8 @@ extern int fl_wait(double time); // in Fl_<platform>.cxx
 static char in_idle;
 
 double Fl::wait(double time_to_wait) {
+  do_widget_deletions();
+
   if (first_timeout) {
     elapse_timeouts();
     Timeout *t;
@@ -1051,6 +1053,48 @@ void Fl_Window::flush() {
   draw();
 }
 
+
+//
+// The following methods allow callbacks to schedule the deletion of
+// widgets at "safe" times.
+//
+
+static int		num_dwidgets = 0, alloc_dwidgets = 0;
+static Fl_Widget	**dwidgets = 0;
+
+void
+Fl::delete_widget(Fl_Widget *w) {
+  if (!w) return;
+
+  if (num_dwidgets >= alloc_dwidgets) {
+    Fl_Widget	**temp;
+
+    temp = new Fl_Widget *[alloc_dwidgets + 10];
+    if (alloc_dwidgets) {
+      memcpy(temp, dwidgets, alloc_dwidgets * sizeof(Fl_Widget *));
+      delete[] dwidgets;
+    }
+
+    dwidgets = temp;
+    alloc_dwidgets += 10;
+  }
+
+  dwidgets[num_dwidgets] = w;
+  num_dwidgets ++;
+}
+
+
+void
+Fl::do_widget_deletion() {
+  if (!num_dwidgets) return;
+
+  for (int i = 0; i < num_dwidgets; i ++)
+    delete dwidgets[i];
+
+  num_dwidgets = 0;
+}
+
+
 //
-// End of "$Id: Fl.cxx,v 1.24.2.41.2.69 2004/11/23 19:09:55 easysw Exp $".
+// End of "$Id: Fl.cxx,v 1.24.2.41.2.70 2004/11/23 19:47:51 easysw Exp $".
 //
diff --git a/src/Fl_Widget.cxx b/src/Fl_Widget.cxx
index 528ac5b81..ecf9fce33 100644
--- a/src/Fl_Widget.cxx
+++ b/src/Fl_Widget.cxx
@@ -1,5 +1,5 @@
 //
-// "$Id: Fl_Widget.cxx,v 1.5.2.4.2.24 2004/08/25 00:20:25 matthiaswm Exp $"
+// "$Id: Fl_Widget.cxx,v 1.5.2.4.2.25 2004/11/23 19:47:52 easysw Exp $"
 //
 // Base widget class for the Fast Light Tool Kit (FLTK).
 //
@@ -129,6 +129,7 @@ extern void fl_throw_focus(Fl_Widget*); // in Fl_x.cxx
 // However, it is only legal to destroy a "root" such as an Fl_Window,
 // and automatic destructors may be called.
 Fl_Widget::~Fl_Widget() {
+  if (flags() & COPIED_LABEL) free(label_.value);
   parent_ = 0; // Don't throw focus to a parent widget.
   fl_throw_focus(this);
 }
@@ -244,6 +245,27 @@ int Fl_Widget::contains(const Fl_Widget *o) const {
   return 0;
 }
 
+
+void
+Fl_Widget::label(const char *a) {
+  if (flags() & COPIED_LABEL) {
+    free(label_.value);
+    clear_flag(COPIED_LABEL);
+  }
+  label_.value=a;
+  redraw_label();
+}
+
+
+void
+Fl_Widget::copy_label(const char *a) {
+  if (flags() & COPIED_LABEL) free(label_.value);
+  set_flag(COPIED_LABEL);
+  label_.value=strdup(a);
+  redraw_label();
+}
+
+
 //
-// End of "$Id: Fl_Widget.cxx,v 1.5.2.4.2.24 2004/08/25 00:20:25 matthiaswm Exp $".
+// End of "$Id: Fl_Widget.cxx,v 1.5.2.4.2.25 2004/11/23 19:47:52 easysw Exp $".
 //
-- 
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