diff options
author | panky-codes <pankaj.sarathy1992@gmail.com> | 2021-03-20 22:45:29 +0100 |
---|---|---|
committer | panky-codes <pankaj.sarathy1992@gmail.com> | 2021-03-20 22:45:29 +0100 |
commit | 534565088033221d29e968acf7267145ff10203b (patch) | |
tree | c93ae7c7aa7995204f56b979ff6524feba83763d /src/displayapp/screens/Screen.h | |
parent | 754ac233040af805ffa2e15b24539d5d02a876e5 (diff) | |
parent | a3ff2e46ca9e663af864a2bd04b9afa3efbddfb8 (diff) |
Merged upstream
Diffstat (limited to 'src/displayapp/screens/Screen.h')
-rw-r--r-- | src/displayapp/screens/Screen.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/displayapp/screens/Screen.h b/src/displayapp/screens/Screen.h index 6b1d0eec..638dac99 100644 --- a/src/displayapp/screens/Screen.h +++ b/src/displayapp/screens/Screen.h @@ -7,6 +7,26 @@ namespace Pinetime { namespace Applications { class DisplayApp; namespace Screens { + + template <class T> + class DirtyValue { + public: + DirtyValue() = default; // Use NSDMI + explicit DirtyValue(T const& v):value{v}{} // Use MIL and const-lvalue-ref + bool IsUpdated() const { return isUpdated; } + T const& Get() { this->isUpdated = false; return value; } // never expose a non-const lvalue-ref + DirtyValue& operator=(const T& other) { + if (this->value != other) { + this->value = other; + this->isUpdated = true; + } + return *this; + } + private: + T value{}; // NSDMI - default initialise type + bool isUpdated{true}; // NSDMI - use brace initilisation + }; + class Screen { public: explicit Screen(DisplayApp* app) : app{app} {} |