Added fl_gleam.cxx..

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10114 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/fl_gleam.cxx

@@ -0,0 +1,131 @@
+//
+// "Gleam" drawing routines for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 1998-2010 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+// These box types provide a sort of Clearlooks Glossy scheme
+// for FLTK.
+//
+// Copyright 2001-2005 by Colin Jones.
+//
+// Modified 2012-2013 by Edmanuel Torres
+// This is a new version of the fl_gleam. The gradients are on the top
+// an the bottom, the text area looks like in the classic FLTK way.
+//
+
+#include <FL/Fl.H>
+#include <FL/fl_draw.H>
+#include <iostream>
+
+using namespace std;
+
+static void gleam_color(Fl_Color c) {
+  if (Fl::draw_box_active()) fl_color(c);
+  else fl_color(fl_inactive(c));
+}
+
+static void shade_rect_top_bottom(int x, int y, int w, int h, Fl_Color fg1, Fl_Color fg2, float th) {
+  // Draws the shiny using maximum limits
+  int h_top  = min(h/2,20);
+  int h_bottom = min(h/6,15);
+  int h_flat = h-(h_top+h_bottom);
+  int j = 0;
+  float step_size_top = h_top>1?(0.999/(float)(h_top)):1;
+  float step_size_bottom = h_bottom>1?(0.999/(float)(h_bottom)):1;
+  // This loop generates the gradient at the top of the widget
+  for (float k = 1; k >= 0; k -= step_size_top){
+    gleam_color(fl_color_average(fl_color_average(fg1, fg2, th), fg1, k));
+    fl_line(x, y+j, x+w, y+j);
+    j++;
+  }
+  gleam_color(fg1);
+  fl_rectf(x, y+h_top, w+1, h_flat);
+  // This loop generates the gradient at the bottom of the widget
+  for (float k = 1; k >= 0; k -= step_size_bottom){
+    gleam_color(fl_color_average(fg1,fl_color_average(fg1, fg2, th), k));
+    fl_line(x, y+j+h_flat-1, x+w, y+j+h_flat-1);
+    j++;
+  }
+}
+
+static void shade_rect_top_bottom_up(int x, int y, int w, int h, Fl_Color bc, float th) {
+  shade_rect_top_bottom(x,y,w,h,bc,FL_WHITE,th);
+}
+
+static void shade_rect_top_bottom_down(int x, int y, int w, int h, Fl_Color bc, float th) {
+  shade_rect_top_bottom(x,y,w,h,bc,FL_BLACK,th);
+}
+
+static void frame_rect(int x, int y, int w, int h, Fl_Color fg1, Fl_Color fg2, Fl_Color lc) {
+  gleam_color(fg1);
+  fl_line(x, y+h-1, x, y+1);         //Go from bottom to top left side
+  fl_line(x+w, y+h-1, x+w, y+1);     //Go from bottom to top right side
+  fl_line(x+1, y, x+w-1, y);         //Go across the top
+  fl_line(x+1, y+h, x+w-1, y+h);     //Go across the bottom
+  gleam_color(fg2);
+  fl_line(x+1, y+h-2, x+1, y+2);     //Go from bottom to top left side
+  fl_line(x+w-1, y+h-2, x+w-1, y+2); //Go from bottom to top right side
+  gleam_color(lc);
+  fl_line(x+2, y+1, x+w-3, y+1);     //Go across the top
+  fl_line(x+2, y+h-1, x+w-3, y+h-1); //Go across the bottom
+}
+
+static void frame_rect_up(int x, int y, int w, int h, Fl_Color bc, Fl_Color lc, float th1, float th2) {
+  frame_rect(x,y,w,h,fl_color_average(fl_darker(bc), FL_BLACK, th1),fl_color_average(bc, FL_WHITE, th2),lc);
+}
+
+static void frame_rect_down(int x, int y, int w, int h, Fl_Color bc, Fl_Color lc, float th1, float th2) {
+  frame_rect(x,y,w,h,fl_color_average(bc, FL_WHITE, th1),fl_color_average(FL_BLACK, bc, th2),lc);
+}
+
+static void up_frame(int x, int y, int w, int h, Fl_Color c) {
+  frame_rect_up(x, y, w-1, h-1, c, fl_color_average(c, FL_WHITE, .25f), .55f, .05f);
+}
+
+static void up_box(int x, int y, int w, int h, Fl_Color c) {
+  shade_rect_top_bottom_up(x+2, y+1, w-5, h-3, c, .15f);
+  frame_rect_up(x, y, w-1, h-1, c, fl_color_average(c, FL_WHITE, .05f), .15f, .05f);
+}
+
+static void thin_up_box(int x, int y, int w, int h, Fl_Color c) {
+  shade_rect_top_bottom_up(x+2, y+1, w-5, h-3, c, .25f);
+  frame_rect_up(x, y, w-1, h-1, c, fl_color_average(c, FL_WHITE, .45f), .25f, .15f);
+}
+
+static void down_frame(int x, int y, int w, int h, Fl_Color c) {
+  frame_rect_down(x, y, w-1, h-1, fl_darker(c), fl_darker(c), .25f, .95f);
+}
+
+static void down_box(int x, int y, int w, int h, Fl_Color c) {
+  shade_rect_top_bottom_down(x+1, y+1, w-3, h-3, c, .65f);
+  frame_rect_down(x, y, w-1, h-1, c, fl_color_average(c, FL_BLACK, .05f), .05f, .95f);
+}
+
+static void thin_down_box(int x, int y, int w, int h, Fl_Color c) {
+  shade_rect_top_bottom_down(x+1, y+1, w-3, h-3, c, .85f);
+  frame_rect_down(x, y, w-1, h-1, c, fl_color_average(c, FL_BLACK, .45f), .35f, 0.85f);
+}
+
+extern void fl_internal_boxtype(Fl_Boxtype, Fl_Box_Draw_F*);
+
+Fl_Boxtype fl_define_FL_GLEAM_UP_BOX() {
+  fl_internal_boxtype(_FL_GLEAM_UP_BOX, up_box);
+  fl_internal_boxtype(_FL_GLEAM_DOWN_BOX, down_box);
+  fl_internal_boxtype(_FL_GLEAM_UP_FRAME, up_frame);
+  fl_internal_boxtype(_FL_GLEAM_DOWN_FRAME, down_frame);
+  fl_internal_boxtype(_FL_GLEAM_THIN_UP_BOX, thin_up_box);
+  fl_internal_boxtype(_FL_GLEAM_THIN_DOWN_BOX, thin_down_box);
+  fl_internal_boxtype(_FL_GLEAM_ROUND_UP_BOX, up_box);
+  fl_internal_boxtype(_FL_GLEAM_ROUND_DOWN_BOX, down_box);
+  return _FL_GLEAM_UP_BOX;
+}