Slider.cpp

00001 #include "Slider.h"
00002 #include <stdio.h>
00003 
00004 /* Constructor: define dimensions, positions and colors */
00005 Slider::Slider(uint16_t x, uint16_t y,  uint16_t w, uint16_t h, uint32_t c1, uint32_t c2)
00006 {
00007     if(x<(maxWidth-w)) xpos=x;
00008     else xpos=maxWidth-w;
00009     if(y<(maxHeight-h)) ypos=y;
00010     else ypos=maxHeight-h;
00011     if(w<(maxWidth)) width=w;
00012     else width=maxWidth;
00013     if(h<(maxHeight)) height=h;
00014     else height=maxHeight;
00015     color1=c1;
00016     color2=c2;
00017     value=128;
00018 }
00019 
00020 /* Draw the slider */
00021 void Slider::Show()
00022 {
00023     char text[10];
00024     uint32_t OldTextColor;
00025     uint32_t OldBackColor;
00026     sFONT *font;
00027 
00028     // Save previous colors and font
00029     OldTextColor=BSP_LCD_GetTextColor();
00030     OldBackColor=BSP_LCD_GetBackColor();
00031     font = BSP_LCD_GetFont();
00032 
00033     // Draw Slider
00034     BSP_LCD_SetTextColor(color2);
00035     BSP_LCD_FillRect(xpos,ypos,width,(height*(255-value))/255);
00036     BSP_LCD_SetTextColor(color1);
00037     BSP_LCD_DrawRect(xpos,ypos,width,(height*(255-value))/255);
00038     BSP_LCD_FillRect(xpos,ypos+(height*(255-value))/255,width,(height*value)/255);
00039 
00040     //Draw text value
00041     BSP_LCD_SetFont(&Font16);
00042     BSP_LCD_SetBackColor(color2);
00043     sprintf(text,"%3d",value);
00044     BSP_LCD_DisplayStringAt(xpos,ypos+height,(uint8_t*)text,LEFT_MODE);
00045     
00046     //Restore colors and fonts
00047     BSP_LCD_SetTextColor(OldTextColor);
00048     BSP_LCD_SetBackColor(OldBackColor);
00049     BSP_LCD_SetFont(font);
00050 }
00051 
00052 /* Move the slider if TouchScreen is in area*/
00053 void Slider::Move(uint16_t x, uint16_t y)
00054 {
00055     if ((x>=xpos) && (x<=xpos+width) && (y>=ypos) && (y<=ypos+height)) { //(y>=ypos+value*height/100-10) && (y<=ypos+value*height/100+10))
00056         value=255-(y-ypos)*255/height;
00057         Show();
00058     }
00059 }
00060 
00061 /* read the slider value */
00062 uint16_t Slider::GetValue()
00063 {
00064     return value;
00065 }
00066 
00067 /* write the slider value */
00068 void Slider::SetValue(uint16_t v)
00069 {
00070     if (v<=255) value=v;
00071     else value=255;
00072     Show();
00073 }
00074 
00075 /* Destructor */
00076 Slider::~Slider()
00077 {
00078 }