Button.cpp

00001 /*
00002  *  Copyright 2014 Embedded Artists AB
00003  *
00004  *  Licensed under the Apache License, Version 2.0 (the "License");
00005  *  you may not use this file except in compliance with the License.
00006  *  You may obtain a copy of the License at
00007  *
00008  *    http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  *  Unless required by applicable law or agreed to in writing, software
00011  *  distributed under the License is distributed on an "AS IS" BASIS,
00012  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  *  See the License for the specific language governing permissions and
00014  *  limitations under the License.
00015  */
00016 
00017 #include "Button.h"
00018 #include "mbed.h"
00019 #include "DMBoard.h"
00020 
00021 #include "lpc_swim_font.h"
00022 
00023 Button::Button(const char* caption, COLOR_T* fb, uint16_t x, uint16_t y, uint16_t width, uint16_t height) :
00024   Clickable(fb, x, y, width, height),
00025   _caption(caption), _capx(0), _capy(0), 
00026   _bgCol(GREEN), _fgCol(BLACK), 
00027   _bgColPressed(BLACK), _fgColPressed(GREEN)
00028 {
00029   swim_set_font_transparency(&_win, 1);
00030   setCaption(caption);
00031 }
00032 
00033 void Button::setCaption(const char* caption)
00034 {
00035   int w, h;
00036   _caption = caption;
00037   swim_get_string_bounds(&_win, _caption, &w, &h);
00038   _capx = (_win.xpmax-_win.xpmin-w)/2;
00039   _capy = (_win.ypmax-_win.ypmin-h)/2;
00040 }
00041 
00042 void Button::setColors(COLOR_T bg, COLOR_T fg, COLOR_T bgPressed, COLOR_T fgPressed)
00043 {
00044   _bgCol = bg;
00045   _fgCol = fg;
00046   _bgColPressed = bgPressed;
00047   _fgColPressed = fgPressed;
00048 }
00049 
00050 void Button::draw(COLOR_T* fb)
00051 {
00052   if (fb != NULL) {
00053     _win.fb = fb;
00054   }
00055   if (_pressed) {
00056     swim_set_pen_color(&_win, _fgColPressed);
00057     swim_set_bkg_color(&_win, _bgColPressed);
00058     swim_set_fill_color(&_win, _fgColPressed);
00059     swim_clear_screen(&_win, _bgColPressed);
00060   } else {
00061     swim_set_pen_color(&_win, _fgCol);
00062     swim_set_bkg_color(&_win, _bgCol);
00063     swim_set_fill_color(&_win, _fgCol);
00064     swim_clear_screen(&_win, _bgCol);
00065   }
00066   swim_put_text_xy(&_win, _caption, _capx, _capy);
00067 }