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Added some comments for clarity. Ready for review. Tested.

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panky-codes 2021-03-13 14:53:37 +01:00
parent 02824d0671
commit d409643b8e
2 changed files with 15 additions and 3 deletions
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14
src/displayapp/screens/StopWatch.cpp
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@ -85,7 +85,19 @@ StopWatch::~StopWatch() {
} }
bool StopWatch::Refresh() { bool StopWatch::Refresh() {
// @startuml CHIP8_state
// State "INIT" as init
// State "RUNNING" as run
// State "HALTED" as halt
// [*] --> init
// init -> run : press play
// run -> run : press lap
// run --> halt : press pause
// halt --> run : press play
// halt --> init : press stop
// @enduml
// Copy paste the above plantuml text to visualize the state diagram
switch (currentState) { switch (currentState) {
// Init state when an user first opens the app // Init state when an user first opens the app
// and when a stop/reset button is pressed // and when a stop/reset button is pressed
@ -132,7 +144,7 @@ bool StopWatch::Refresh() {
if (lapBuffer[0]) { if (lapBuffer[0]) {
lv_label_set_text_fmt(lapTwoText, "#%d %d:%d:%d", lapNr, lapBuffer[0]->mins, lapBuffer[0]->secs, lapBuffer[0]->msecs); lv_label_set_text_fmt(lapTwoText, "#%d %d:%d:%d", lapNr, lapBuffer[0]->mins, lapBuffer[0]->secs, lapBuffer[0]->msecs);
} }
// Reset the bool to avoid setting the text in each cycle // Reset the bool to avoid setting the text in each cycle until there is a change
lapPressed = false; lapPressed = false;
} }

4
src/displayapp/screens/StopWatch.h
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@ -21,6 +21,7 @@ namespace Pinetime::Applications::Screens {
int msecs; int msecs;
}; };
// A simple buffer to hold the latest two laps
template <int N> struct LapTextBuffer_t { template <int N> struct LapTextBuffer_t {
LapTextBuffer_t() : _arr {}, currentSz {}, capacity {N}, head {-1} { LapTextBuffer_t() : _arr {}, currentSz {}, capacity {N}, head {-1} {
} }
@ -41,11 +42,11 @@ namespace Pinetime::Applications::Screens {
head = -1; head = -1;
} }
// Optional return type would be much more appropriate here
TimeSeparated_t* operator[](std::size_t idx) { TimeSeparated_t* operator[](std::size_t idx) {
// Sanity check for out-of-bounds // Sanity check for out-of-bounds
if (idx >= 0 && idx < capacity) { if (idx >= 0 && idx < capacity) {
if (idx < currentSz) { if (idx < currentSz) {
// This transformation is to ensure that head is always pointing to index 0.
const auto transformed_idx = (head - idx) % capacity; const auto transformed_idx = (head - idx) % capacity;
return (&_arr[transformed_idx]); return (&_arr[transformed_idx]);
} }
@ -66,7 +67,6 @@ namespace Pinetime::Applications::Screens {
~StopWatch() override; ~StopWatch() override;
bool Refresh() override; bool Refresh() override;
bool OnButtonPushed() override; bool OnButtonPushed() override;
bool OnTouchEvent(uint16_t x, uint16_t y) override;
void playPauseBtnEventHandler(lv_event_t event); void playPauseBtnEventHandler(lv_event_t event);
void stopLapBtnEventHandler(lv_event_t event); void stopLapBtnEventHandler(lv_event_t event);