b16309f13e
This adds fl_rounded_rect and fl_rounded_rectf so the user can draw rounded rectangles. This uses existing and optimised code that is rearranged.
82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
//
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// Rounded box drawing routines for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2020 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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#include <FL/Fl.H>
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#include <FL/fl_draw.H>
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// Global parameters for rounded corner drawing algorithm:
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//
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// RN = number of segments per corner (must match offset array size)
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// RS = max. corner radius
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// BW = box shadow width
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#define RS (Fl::box_border_radius_max())
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#define BW (Fl::box_shadow_width())
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static void rbox(int fill, int x, int y, int w, int h) {
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int rs, rsy;
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rs = w*2/5; rsy = h*2/5;
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if (rs > rsy) rs = rsy; // use smaller radius
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if (rs > RS) rs = RS;
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if (fill)
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fl_rounded_rectf(x, y, w, h, rs);
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else
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fl_rounded_rect(x, y, w, h, rs);
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}
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static void fl_rflat_box(int x, int y, int w, int h, Fl_Color c) {
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Fl::set_box_color(c);
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rbox(1, x, y, w, h); rbox(0, x, y, w, h);
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}
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static void fl_rounded_frame(int x, int y, int w, int h, Fl_Color c) {
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Fl::set_box_color(c);
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rbox(0, x, y, w, h);
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}
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static void fl_rounded_box(int x, int y, int w, int h, Fl_Color c) {
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Fl::set_box_color(c);
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rbox(1, x, y, w, h);
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fl_color(FL_BLACK); rbox(0, x, y, w, h);
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}
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static void fl_rshadow_box(int x, int y, int w, int h, Fl_Color c) {
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// draw shadow:
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fl_color(FL_DARK3);
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rbox(1, x+BW, y+BW, w, h);
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rbox(0, x+BW, y+BW, w, h);
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// draw the box:
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fl_rounded_box(x, y, w, h, c);
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}
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extern void fl_internal_boxtype(Fl_Boxtype, Fl_Box_Draw_F*);
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Fl_Boxtype fl_define_FL_ROUNDED_BOX() {
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fl_internal_boxtype(_FL_ROUNDED_FRAME, fl_rounded_frame);
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fl_internal_boxtype(_FL_ROUNDED_BOX, fl_rounded_box);
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return _FL_ROUNDED_BOX;
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}
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Fl_Boxtype fl_define_FL_RFLAT_BOX() {
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fl_internal_boxtype(_FL_RFLAT_BOX, fl_rflat_box);
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return _FL_RFLAT_BOX;
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}
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Fl_Boxtype fl_define_FL_RSHADOW_BOX() {
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fl_internal_boxtype(_FL_RSHADOW_BOX, fl_rshadow_box);
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return _FL_RSHADOW_BOX;
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}
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