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Improve const correctness in the Screen class (#701)

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- Add a const variant to the accessor functions
- Make Print and ToString functions const

This fixes: https://github.com/ArthurSonzogni/FTXUI/issues/700
This commit is contained in:
Igor Bogoslavskyi
2023-07-26 00:41:16 +02:00
committed by GitHub
parent 43240a5fd4
commit b50f1fffc8
2 changed files with 38 additions and 16 deletions
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17
include/ftxui/screen/screen.hpp
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@@ -66,13 +66,18 @@ class Screen {
static Screen Create(Dimensions dimension);
static Screen Create(Dimensions width, Dimensions height);
// Node write into the screen using Screen::at.
// Access a character in the grid at a given position.
std::string& at(int x, int y);
Pixel& PixelAt(int x, int y);
const std::string& at(int x, int y) const;
// Convert the screen into a printable string in the terminal.
std::string ToString();
void Print();
// Access a cell (Pixel) in the grid at a given position.
Pixel& PixelAt(int x, int y);
const Pixel& PixelAt(int x, int y) const;
std::string ToString() const;
// Print the Screen on to the terminal.
void Print() const;
// Get screen dimensions.
int dimx() const { return dimx_; }
@@ -81,7 +86,7 @@ class Screen {
// Move the terminal cursor n-lines up with n = dimy().
std::string ResetPosition(bool clear = false) const;
// Fill with space.
// Fill the screen with space.
void Clear();
void ApplyShader();