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Diffstat (limited to 'test/unittest_text.cxx')
| -rw-r--r-- | test/unittest_text.cxx | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/test/unittest_text.cxx b/test/unittest_text.cxx new file mode 100644 index 000000000..231e22dbe --- /dev/null +++ b/test/unittest_text.cxx @@ -0,0 +1,97 @@ +// +// "$Id: $" +// +// Unit tests for the Fast Light Tool Kit (FLTK). +// +// Copyright 1998-2009 by Bill Spitzak and others. +// +// 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. +// +// Please report all bugs and problems on the following page: +// +// http://www.fltk.org/str.php +// + +#include <FL/Fl_Box.H> +#include <FL/fl_draw.H> + +// +// --- fl_text_extents() tests ----------------------------------------------- +// +class TextExtentsTest : public Fl_Widget +{ + void DrawTextAndBoxes(const char *txt, int X, int Y) { + int wo = 0, ho = 0; + int dx, dy; + // First, we draw the bounding boxes (fl_measure and fl_text_extents) + // draw fl_measure() typographical bounding box + fl_measure(txt, wo, ho, 0); + int desc = fl_descent(); + fl_color(FL_RED); + fl_rect(X, Y-ho+desc, wo, ho); + // draw fl_text_extents() glyph bounding box + fl_text_extents(txt, dx, dy, wo, ho); + fl_color(FL_GREEN); + fl_rect(X+dx, Y+dy, wo, ho); + // Then we draw the text to show how it fits insode each of the two boxes + fl_color(FL_BLACK); + fl_draw(txt, X, Y); + } +public: + static Fl_Widget *create() { + return new TextExtentsTest(TESTAREA_X, TESTAREA_Y, TESTAREA_W, TESTAREA_H); + } + TextExtentsTest(int x, int y, int w, int h) : Fl_Widget(x, y, w, h) {} + void draw(void) { + int x0 = x(); // origin is current window position for Fl_Box + int y0 = y(); + int w0 = w(); + int h0 = h(); + fl_push_clip(x0, y0, w0, h0); // reset local clipping + { + // set the background colour - slightly off-white to enhance the green bounding box + fl_color(fl_gray_ramp(FL_NUM_GRAY - 3)); + fl_rectf(x0, y0, w0, h0); + + fl_font(FL_HELVETICA, 30); + int xx = x0+55; + int yy = y0+40; + DrawTextAndBoxes("!abcdeABCDE\"#A", xx, yy); yy += 50; // mixed string + DrawTextAndBoxes("oacs", xx, yy); xx += 100; // small glyphs + DrawTextAndBoxes("qjgIPT", xx, yy); yy += 50; xx -= 100; // glyphs with descenders + DrawTextAndBoxes("````````", xx, yy); yy += 50; // high small glyphs + DrawTextAndBoxes("--------", xx, yy); yy += 50; // mid small glyphs + DrawTextAndBoxes("________", xx, yy); yy += 50; // low small glyphs + + fl_font(FL_HELVETICA, 14); + fl_color(FL_RED); fl_draw("fl_measure bounding box in RED", xx, yy); yy += 20; + fl_color(FL_GREEN); fl_draw("fl_text_extents bounding box in GREEN", xx, yy); + fl_color(FL_BLACK); + xx = x0 + 10; yy += 30; + fl_draw("NOTE: On systems with text anti-aliasing (e.g. OSX Quartz)", xx, yy); + w0 = h0 = 0; fl_measure("NOTE: ", w0, h0, 0); + xx += w0; yy += h0; + fl_draw("text may leak slightly outside the fl_text_extents()", xx, yy); + } + fl_pop_clip(); // remove the local clip + } +}; + +UnitTest textExtents("rendering text", TextExtentsTest::create); + +// +// End of "$Id: $" +// |