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Implement menu rendering (very basic without selection)

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Jan-Henrik 2020-02-04 23:19:53 +01:00
parent e54318126a
commit 85d1144261
4 changed files with 36 additions and 7 deletions
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1
midi2cv/makefile
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@ -40,6 +40,7 @@ UPLOAD_COMMAND = upload_combo_jtag
TARGET = midi2cv
PACKAGES = midi2cv \
midi2cv/drivers \
midi2cv/menu \
stmlib/utils \
stmlib/system
RESOURCES = midi2cv/resources

26
midi2cv/menu/menu.cc
View file

@ -1,7 +1,31 @@
#include "menu.h"
#include <algorithm>
#include <u8g2.h>
#define MENU_ITEM_HEIGHT 8
void Menu::render(u8g2_t* u8g2_, uint8_t x, uint8_t y, uint8_t width, uint8_t height) {
void Menu::render(u8g2_t* u8g2_, uint8_t xStart, uint8_t yStart, uint8_t width, uint8_t height)
{
uint8_t maxVisibleItems = height / MENU_ITEM_HEIGHT;
uint8_t itemsToRender = std::min(maxVisibleItems, uint8_t(this->itemCount - currentScrollStart));
for (uint8_t i = 0; i < itemsToRender; i++) {
bool selected = this->selectedItem == (i + this->currentScrollStart);
uint8_t yPosition = yStart + i * MENU_ITEM_HEIGHT;
AbstractMenuItem* item = this->items[i + this->currentScrollStart];
u8g2_SetDrawColor(u8g2_, selected ? 1 : 0);
if (selected) {
u8g2_DrawBox(u8g2_, xStart, yPosition, width, MENU_ITEM_HEIGHT);
}
u8g2_SetDrawColor(u8g2_, !selected ? 1 : 0);
u8g2_DrawStr(u8g2_, xStart + 0, yPosition + MENU_ITEM_HEIGHT, item->get_label());
uint8_t valueStringWidth = u8g2_GetStrWidth(u8g2_, item->get_string_representation());
u8g2_DrawStr(u8g2_, xStart + width - valueStringWidth, yPosition + MENU_ITEM_HEIGHT, item->get_string_representation());
}
}

2
midi2cv/menu/menu_items.h
View file

@ -14,6 +14,7 @@ template <class T>
class MenuItem : public AbstractMenuItem {
private:
const char* label;
bool visible;
T value;
T step;
char stringRepresentation[24];
@ -21,6 +22,7 @@ class MenuItem : public AbstractMenuItem {
protected:
MenuItem(const char* _label, T _initialValue)
: label(_label)
, visible(true)
, value(_initialValue) {};
virtual void to_string(char* buf) = 0;

2
midi2cv/midi2cv.cc
View file

@ -129,6 +129,8 @@ int main(void)
menu.add_item(&item);
menu.add_item(&item2);
menu.add_item(&item3);
menu.render(0, 0, 0, 0, 0);
item.increase();
item2.increase();
item3.increase();