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LcdDrawer.h
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LcdDrawer.h
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#ifndef __lcd_drawer_h__
#define __lcd_drawer_h__
#include <MenuLib.h>
#include <LightLCD.h>
class LcdDrawer : public MenuItemDrawer {
protected:
LightLCD& lcd;
uint8_t items_per_screen;
uint8_t getNumLength(uint8_t num) {
uint8_t numLength = 0, tmp;
if(num == 0) return 1;
// Init
tmp = abs(num);
while(tmp != 0) {
tmp = tmp / 10;
numLength++;
}
if(num < 0) numLength++;
return numLength;
}
void setCenterCursor(uint8_t len, uint8_t y, uint8_t from = 0, uint8_t to = 0) {
uint8_t x;
if (to == 0)
to = lcd.width();
if( len > to - from )
x = from;
else
x = from + ( to - from - len ) / 2;
lcd.setCursor(x, y);
}
void drawCenterText(MenuItem* item, uint8_t y) {
if (item->isTextFlash()) {
const FlashString* text = reinterpret_cast<const FlashString*>(item->getText());
setCenterCursor(lcd.getStringWidth(text), y);
lcd.print(text);
} else {
const char* text = item->getText();
setCenterCursor(lcd.getStringWidth(text), y);
lcd.print(text);
}
}
void drawCenterNumber(uint8_t num, uint8_t y, uint8_t from = 0, uint8_t to = 0) {
if (to == 0)
to = lcd.width();
// A digit has an average width of 4px
setCenterCursor(4 * getNumLength(num), y, from, to);
lcd.print(num);
}
void drawMenu(Menu* menu) {
uint8_t color = 1;
uint8_t i = 0, y;
char* secText;
//lcd.drawLine(0, 7, lcd.width(), 7, 1) ;
drawCenterText(menu, 0);
ListEntry *e = menu->getCollection(), *first = e;
if (!e) return;
// Each screen contains 3 entry; when the third is reached, the next 3 will be shown
// Find the right place where to start by scanning from the top.
do {
// Skip disabled items
if (e->item->isEnabled()) {
if (i % items_per_screen == 0)
first = e;
i++;
}
if (e == menu->getSelectedListEntry())
break;
e = e->next;
} while(e);
e = first;
i = 0;
lcd.setCursor(0, 12);
// Now actually draw the entries
while (e && i < items_per_screen) {
if (e->item->isEnabled()) {
y = 9 + 13 * i;
if(e == menu->getSelectedListEntry()) {
lcd.fillRect(0, y, lcd.width(), 13, 1);
lcd.setTextColor(0);
} else
lcd.setTextColor(1);
secText = (char*)e->item->getSecondaryText();
if(!secText)
y += 3;
else {
// Draw secondary text
lcd.setCursor(lcd.width() - lcd.getStringWidth(secText), y + 6);
lcd.print(secText);
}
// Draw item's text
lcd.setCursor(1, y);
if (e->item->isTextFlash()) {
const FlashString* text = reinterpret_cast<const FlashString*>(e->item->getText());
lcd.print(text);
} else {
const char* text = e->item->getText();
lcd.print(text);
}
i++;
}
e = e->next;
}
lcd.setTextColor(1);
}
#if defined PCD8544
#define RECT_W 68
#define RECT_H 14
#define RECT_Y 18
#elif defined SSD1306
#define RECT_W 68
#define RECT_H 14
#define RECT_Y 18
#endif
#define RECT_X (lcd.width() - RECT_W) / 2
#define TEXT_Y RECT_Y + (RECT_H - 7) / 2
void drawSelector(NumericSelector* selector) {
// Draw title
drawCenterText(selector, 0);
//lcd.drawLine(0, 8, lcd.width(), 8, 1) ;
// Draw a rect around the value
lcd.drawRect(RECT_X, RECT_Y, RECT_W, RECT_H, 1);
// Some decoration
lcd.setCursor(RECT_X + 3, TEXT_Y);
lcd.print('<');
// Guess the x pos to center the value number
drawCenterNumber(selector->getValue(), TEXT_Y);
// Still some decorations
lcd.setCursor(RECT_X + RECT_W - 6, TEXT_Y);
lcd.println('>');
}
// Override this to extend functionalities
void virtual drawOther(MenuItem* item) {};
public:
LcdDrawer(LightLCD& lcd, uint8_t num_items) : lcd(lcd), items_per_screen(num_items) {}
void draw(MenuItem* item) {
if(!item) return;
lcd.clear();
lcd.setCursor(0, 0);
switch(item->getTypeId()) {
case 'm':
drawMenu((Menu*)item);
break;
// Actions and Check Boxes does not need to be drawn
// case 'a':
// case 'c':
case 's':
drawSelector((NumericSelector*)item);
break;
default:
drawOther(item);
}
lcd.update();
}
};
#endif