add GUI for viewpoint selection

1 files changed, 129 insertions, 0 deletions

diff --git a/src/Fl_Search_Chooser.cxx b/src/Fl_Search_Chooser.cxx
new file mode 100644
index 0000000..bfcf7fb
--- /dev/null
+++ b/src/Fl_Search_Chooser.cxx
@@ -0,0 +1,129 @@
+//
+// Search Chooser widget for the Fast Light Tool Kit (FLTK).
+// 
+// Copyright by Johannes Hofmann
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This 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
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+// USA.
+//
+//
+
+#include <stdio.h>
+#include <string.h>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Button.H>
+#include "Fl_Search_Chooser.H"
+
+int
+Fl_Search_Browser::find_prefix(const char *p) {
+  int i = find_prefix(p, 1, size());
+  if (i == -1) {
+    return 1;
+  } else {
+    deselect();
+    middleline(i);
+    select(i);
+    return 0;
+  }
+};
+
+int
+Fl_Search_Browser::find_prefix(const char *p, int s, int e) {
+  if (s < 0 || e > size() || s > e) {
+    fprintf(stderr, "Invalid search range %d %d\n", s, e);
+    return 1;
+  } else if (e - s <= 1) {
+    if (strncasecmp(p, text(s), strlen(p)) == 0) {
+       return s;
+    } else if (strncasecmp(p, text(e), strlen(p)) == 0){
+       return e;
+    } else {
+       return -1;
+    }
+  } else {
+    int med = s + (e - s) / 2;
+    if (strncasecmp(p, text(med), strlen(p)) > 0) {
+      return find_prefix(p, med, e);
+    } else {
+      return find_prefix(p, s, med);
+    }
+  }
+} 
+
+
+static void input_cb(Fl_Input* in, void*c) {
+  Fl_Search_Browser *sb = ((Fl_Search_Chooser *) c)->sb;
+  sb->find_prefix(in->value()); 
+}    
+
+
+static void ok_cb(Fl_Input* in, void*c) {
+  Fl_Search_Chooser *sc = (Fl_Search_Chooser *) c;
+  sc->w->hide();
+} 
+
+
+static void cancel_cb(Fl_Input* in, void*c) {
+  Fl_Search_Chooser *sc = (Fl_Search_Chooser *) c;
+  sc->sb->deselect();
+  sc->w->hide();
+}    
+
+Fl_Search_Chooser::Fl_Search_Chooser(const char *title) {
+  w = new Fl_Window(320, 320, title?title:"Choose");
+  Fl_Group *g = new Fl_Group(10, 10, w->w() - 10, w->h() - 10);
+  sb = new Fl_Search_Browser(g->x(), g->y(), g->w() , g->h() - 100, NULL);
+  sb->type(FL_HOLD_BROWSER);
+  Fl_Input *in = new Fl_Input(g->x(), g->h() - 80, g->w()-10, 20);
+  in->callback((Fl_Callback*) input_cb, this);
+  in->when(FL_WHEN_CHANGED);
+  Fl_Button *cancel_b = new Fl_Button(g->w()-200, g->h()-30, 80, 20, "Cancel");
+  cancel_b->callback((Fl_Callback*) cancel_cb, this);
+  Fl_Button *ok_b = new Fl_Button(g->w()-100, g->h()-30, 80, 20, "Ok");
+  ok_b->callback((Fl_Callback*) ok_cb, this);
+  g->end();
+  w->end();
+}
+
+Fl_Search_Chooser::~Fl_Search_Chooser() {
+  delete sb;
+  delete w;
+}
+
+void
+Fl_Search_Chooser::add(const char *t, void *d) {
+  sb->add(t, d);
+}
+
+void *
+Fl_Search_Chooser::data() {
+  int v = sb->value();
+  if (v) {
+    return sb->data(v);
+  } else {
+    return NULL;
+  }
+}
+
+void
+Fl_Search_Chooser::show() {
+  w->show();
+}
+
+int
+Fl_Search_Chooser::shown() {
+  return w->shown();
+}
+