drivers/displays/tft/controls/button.c

   1 /**************************************************************************/
   2 /*!
   3     @file     button.c
   4     @author   K. Townsend (microBuilder.eu)
   5
   6     @brief    Renders a button
   7
   8     @section LICENSE
   9
  10     Software License Agreement (BSD License)
  11
  12     Copyright (c) 2012, K. Townsend
  13     All rights reserved.
  14
  15     Redistribution and use in source and binary forms, with or without
  16     modification, are permitted provided that the following conditions are met:
  17     1. Redistributions of source code must retain the above copyright
  18     notice, this list of conditions and the following disclaimer.
  19     2. Redistributions in binary form must reproduce the above copyright
  20     notice, this list of conditions and the following disclaimer in the
  21     documentation and/or other materials provided with the distribution.
  22     3. Neither the name of the copyright holders nor the
  23     names of its contributors may be used to endorse or promote products
  24     derived from this software without specific prior written permission.
  25
  26     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
  27     EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  28     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  29     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
  30     DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  31     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  32     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  33     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  35     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36 */
  37 /**************************************************************************/
  38 #include <string.h>
  39
  40 #include "button.h"
  41
  42 /**************************************************************************/
  43 /*!
  44     @brief  Draws a simple button with centered text
  45
  46     @param[in]  x
  47                 Starting x co-ordinate
  48     @param[in]  y
  49                 Starting y co-ordinate
  50     @param[in]  width
  51                 Button width in pixels
  52     @param[in]  height
  53                 Button height in pixels
  54     @param[in]  fontColor
  55                 Color used when rendering the text
  56     @param[in]  text
  57                 Text to center inside the button
  58 */
  59 /**************************************************************************/
  60 void buttonRender(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint16_t fontColor, char *text, theme_t theme)
  61 {
  62   uint16_t brighter, darker;
  63   uint16_t buttonEnd;
  64
  65   // Draw background gradient then outline
  66   drawGradient(x+2, y+2, x+width-2, y+height-2, theme.colorFill, theme.colorBorder);
  67   drawRoundedRectangle(x+1, y+1, x+width-1, y+height-1, theme.colorFill, 5, DRAW_CORNERS_ALL);
  68   drawRoundedRectangle(x, y, x+width, y+height, theme.colorBorderDarker, 5, DRAW_CORNERS_ALL);
  69
  70   #if CFG_TFTLCD_USEAAFONTS
  71     uint16_t ctable[4];
  72
  73     // Calculate 4 color lookup table using the appropriate fore and bg colors
  74     // This should really be optimized out into theme.h!
  75     aafontsCalculateColorTable(theme.colorFill, fontColor, &ctable[0], 4);
  76
  77     if (text != NULL)
  78     {
  79       aafontsCenterString(x + width / 2, y + 1 + (height / 2) - (THEME_FONT.fontHeight / 2), ctable, &THEME_FONT, text);
  80     }
  81   #else
  82     // Render text
  83     if (text != NULL)
  84     {
  85       uint16_t textWidth = fontsGetStringWidth(&THEME_FONT, text);
  86       uint16_t xStart = x + (width / 2) - (textWidth / 2);
  87       uint16_t yStart = y + (height / 2) - (THEME_FONT.height / 2) + 1;
  88       fontsDrawString(xStart, yStart, fontColor, &THEME_FONT, text);
  89     }
  90   #endif
  91 }