ImageButton.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 "ImageButton.h"
00018 #include "mbed.h"
00019 #include "DMBoard.h"
00020 
00021 #include "lpc_swim_image.h"
00022 #include "lpc_swim_font.h"
00023 #include "lpc_colors.h"
00024 
00025 ImageButton::ImageButton(COLOR_T* fb, uint16_t x, uint16_t y, uint16_t width, uint16_t height,
00026                          const char* caption, COLOR_T color) :
00027   Clickable(fb, x, y, width, height+(caption==NULL?0:20))
00028 {
00029   _imgUp.pointerToFree = NULL;
00030   _imgUp.pixels = NULL;
00031   _imgDown.pointerToFree = NULL;
00032   _imgDown.pixels = NULL;
00033   _caption = NULL;
00034   _transparent = false;
00035     
00036   if (caption != NULL) {
00037     _caption = (char*)malloc(strlen(caption)+1);
00038     if (_caption != NULL) {
00039       strcpy(_caption, caption);
00040     }
00041     _captionColor = color;
00042   }
00043 }
00044 
00045 ImageButton::~ImageButton()
00046 {
00047   if (_imgUp.pointerToFree != NULL) {
00048     free(_imgUp.pointerToFree);
00049     _imgUp.pointerToFree = NULL;
00050   }
00051   if (_imgDown.pointerToFree != NULL) {
00052     free(_imgDown.pointerToFree);
00053     _imgDown.pointerToFree = NULL;
00054   }
00055   if (_caption != NULL) {
00056     free(_caption);
00057     _caption = NULL;
00058   }
00059 }
00060 
00061 bool ImageButton::loadImages(const char* imgUp, const char* imgDown)
00062 {
00063   if (_imgUp.pointerToFree != NULL) {
00064     free(_imgUp.pointerToFree);
00065     _imgUp.pointerToFree = NULL;
00066   }
00067   if (_imgDown.pointerToFree != NULL) {
00068     free(_imgDown.pointerToFree);
00069     _imgDown.pointerToFree = NULL;
00070   }
00071   if (Image::decode(imgUp, Image::RES_16BIT, &_imgUp) != 0) {
00072     DMBoard::instance().logger()->printf("Failed to load %s\n", imgUp);
00073     return false;
00074   }
00075   if (imgDown != NULL) {
00076     if (Image::decode(imgDown, Image::RES_16BIT, &_imgDown) == 0) {
00077       DMBoard::instance().logger()->printf("Failed to load %s\n", imgDown);
00078       return false;
00079     }
00080   }
00081   return true;
00082 }
00083 
00084 bool ImageButton::loadImages(const unsigned char* imgUp, unsigned int imgUpSize, 
00085                              const unsigned char* imgDown, unsigned int imgDownSize)
00086 {
00087   if (_imgUp.pointerToFree != NULL) {
00088     free(_imgUp.pointerToFree);
00089     _imgUp.pointerToFree = NULL;
00090   }
00091   if (_imgDown.pointerToFree != NULL) {
00092     free(_imgDown.pointerToFree);
00093     _imgDown.pointerToFree = NULL;
00094   }
00095   if (Image::decode(imgUp, imgUpSize, Image::RES_16BIT, &_imgUp) != 0) {
00096     DMBoard::instance().logger()->printf("Failed to load %s\n", imgUp);
00097     return false;
00098   }
00099   if (imgDown != NULL) {
00100     if (Image::decode(imgDown, imgDownSize, Image::RES_16BIT, &_imgDown) == 0) {
00101       DMBoard::instance().logger()->printf("Failed to load %s\n", imgDown);
00102       return false;
00103     }
00104   }
00105   return true;
00106 }
00107 
00108 bool ImageButton::loadImages(Resource* resImgUp, Resource* resImgDown)
00109 {
00110   if (_imgUp.pointerToFree != NULL) {
00111     free(_imgUp.pointerToFree);
00112     _imgUp.pointerToFree = NULL;
00113   }
00114   if (_imgDown.pointerToFree != NULL) {
00115     free(_imgDown.pointerToFree);
00116     _imgDown.pointerToFree = NULL;
00117   }
00118   if (Image::decode(resImgUp, Image::RES_16BIT, &_imgUp) != 0) {
00119     DMBoard::instance().logger()->printf("Failed to load \"up\" image\n");
00120     return false;
00121   }
00122   if (resImgDown != NULL) {
00123     if (Image::decode(resImgDown, Image::RES_16BIT, &_imgDown) == 0) {
00124       DMBoard::instance().logger()->printf("Failed to load \"down\" image\n");
00125       return false;
00126     }
00127   }
00128   return true;
00129 }
00130 
00131 
00132 void ImageButton::setTransparency(COLOR_T tColor)
00133 {
00134   _transparent = true;
00135   _transparentColor = tColor;
00136 }
00137 
00138 void ImageButton::draw(COLOR_T* fb)
00139 {
00140   if (fb != NULL) {
00141     _win.fb = fb;
00142   }
00143   if (_caption != NULL) {
00144     _win.pen = _captionColor;
00145     swim_put_text_centered_win(&_win, _caption, _imgUp.height+2);
00146   }
00147   if (_pressed) {
00148     if (_imgDown.pixels != NULL) {
00149       if (_transparent) {
00150         swim_put_transparent_image_xy(&_win, _imgDown.pixels, _imgDown.width, _imgDown.height, 0, 0, _transparentColor);
00151       } else {
00152         swim_put_image(&_win, _imgDown.pixels, _imgDown.width, _imgDown.height);
00153       }
00154     }
00155   } else {
00156     if (_imgUp.pixels != NULL) {
00157       if (_transparent) {
00158         swim_put_transparent_image_xy(&_win, _imgUp.pixels, _imgUp.width, _imgUp.height, 0, 0, _transparentColor);
00159       } else {
00160         swim_put_image(&_win, _imgUp.pixels, _imgUp.width, _imgUp.height);
00161       }
00162     }
00163   }
00164 }