Split general FLTK appearance to separate file

These are general things and not specific to TigerVNC, so let's move it
to the fltk specific directory for clarity.

2 files changed, 86 insertions, 0 deletions

diff --git a/vncviewer/fltk/theme.cxx b/vncviewer/fltk/theme.cxx
new file mode 100644
index 00000000..7478cd88
--- /dev/null
+++ b/vncviewer/fltk/theme.cxx
@@ -0,0 +1,57 @@
+/* Copyright 2011-2022 Pierre Ossman for Cendio AB
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <FL/Fl.H>
+#include <FL/Fl_Widget.H>
+#include <FL/fl_ask.H>
+
+#include "theme.h"
+
+void init_theme()
+{
+  // Basic text size (10pt @ 96 dpi => 13px)
+  FL_NORMAL_SIZE = 13;
+
+  // Select a FLTK scheme and background color that looks somewhat
+  // close to modern systems
+  Fl::scheme("gtk+");
+  Fl::background(220, 220, 220);
+
+  // macOS has a slightly brighter default background though
+#ifdef __APPLE__
+  Fl::background(240, 240, 240);
+#endif
+
+  // This makes the "icon" in dialogs rounded, which fits better
+  // with the above schemes.
+  fl_message_icon()->box(FL_UP_BOX);
+
+#ifdef WIN32
+  // Most "normal" Windows apps use this font for UI elements.
+  Fl::set_font(FL_HELVETICA, "Tahoma");
+#endif
+}
diff --git a/vncviewer/fltk/theme.h b/vncviewer/fltk/theme.h
new file mode 100644
index 00000000..aa4b3586
--- /dev/null
+++ b/vncviewer/fltk/theme.h
@@ -0,0 +1,29 @@
+/* Copyright 2022 Pierre Ossman for Cendio AB
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __FLTK_THEME_H__
+#define __FLTK_THEME_H__
+
+void init_theme();
+
+#endif