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Canvas bug fix and documentation. (#289)

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Arthur Sonzogni 2021-12-29 16:31:27 +01:00 committed by GitHub
parent 7614bf04a6
commit aea67743d4
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2 changed files with 287 additions and 54 deletions
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2
examples/component/canvas_animated.cpp
View File

@ -184,7 +184,7 @@ int main(int argc, const char* argv[]) {
});
int selected_tab = 0;
int selected_tab = 12;
auto tab = Container::Tab({
renderer_line_braille,
renderer_line_block,

339
src/ftxui/dom/canvas.cpp
View File

@ -60,22 +60,42 @@ const std::map<std::string, uint8_t> g_map_block_inversed = {
} // namespace
/// @brief Constructor.
/// @param width the width of the canvas. A cell is a 2x8 braille dot.
/// @param height the height of the canvas. A cell is a 2x8 braille dot.
Canvas::Canvas(int width, int height)
: width_(width), height_(height), storage_(width_ * height_ / 8) {}
/// @brief Get the content of a cell.
/// @param x the x coordinate of the cell.
/// @param y the y coordinate of the cell.
Pixel Canvas::GetPixel(int x, int y) const {
auto it = storage_.find(XY{x / 2, y / 4});
auto it = storage_.find(XY{x, y});
return (it == storage_.end()) ? Pixel{} : it->second.content;
}
/// @brief Draw a braille dot.
/// @param x the x coordinate of the dot.
/// @param y the y coordinate of the dot.
/// @param value whether the dot is filled or not.
void Canvas::DrawPoint(int x, int y, bool value) {
DrawPoint(x, y, value, [](Pixel&) {});
}
/// @brief Draw a braille dot.
/// @param x the x coordinate of the dot.
/// @param y the y coordinate of the dot.
/// @param value whether the dot is filled or not.
/// @param color the color of the dot.
void Canvas::DrawPoint(int x, int y, bool value, const Color& color) {
DrawPoint(x, y, value, [color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw a braille dot.
/// @param x the x coordinate of the dot.
/// @param y the y coordinate of the dot.
/// @param value whether the dot is filled or not.
/// @param style the style of the cell.
void Canvas::DrawPoint(int x, int y, bool value, const Stylizer& style) {
Style(x, y, style);
if (value)
@ -84,6 +104,9 @@ void Canvas::DrawPoint(int x, int y, bool value, const Stylizer& style) {
DrawPointOff(x, y);
}
/// @brief Draw a braille dot.
/// @param x the x coordinate of the dot.
/// @param y the y coordinate of the dot.
void Canvas::DrawPointOn(int x, int y) {
if (!IsIn(x, y))
return;
@ -97,6 +120,9 @@ void Canvas::DrawPointOn(int x, int y) {
cell.content.character[2] |= g_map_braille[x % 2][y % 4][1];
}
/// @brief Erase a braille dot.
/// @param x the x coordinate of the dot.
/// @param y the y coordinate of the dot.
void Canvas::DrawPointOff(int x, int y) {
if (!IsIn(x, y))
return;
@ -110,6 +136,10 @@ void Canvas::DrawPointOff(int x, int y) {
cell.content.character[2] &= ~(g_map_braille[x % 2][y % 4][1]);
}
/// @brief Toggle a braille dot. A filled one will be erased, and the other will
/// be drawn.
/// @param x the x coordinate of the dot.
/// @param y the y coordinate of the dot.
void Canvas::DrawPointToggle(int x, int y) {
if (!IsIn(x, y))
return;
@ -123,15 +153,32 @@ void Canvas::DrawPointToggle(int x, int y) {
cell.content.character[2] ^= g_map_braille[x % 2][y % 4][1];
}
/// @brief Draw a line made of braille dots.
/// @param x1 the x coordinate of the first dot.
/// @param y1 the y coordinate of the first dot.
/// @param x2 the x coordinate of the second dot.
/// @param y2 the y coordinate of the second dot.
void Canvas::DrawPointLine(int x1, int y1, int x2, int y2) {
DrawPointLine(x1, y1, x2, y2, [](Pixel&) {});
}
/// @brief Draw a line made of braille dots.
/// @param x1 the x coordinate of the first dot.
/// @param y1 the y coordinate of the first dot.
/// @param x2 the x coordinate of the second dot.
/// @param y2 the y coordinate of the second dot.
/// @param color the color of the line.
void Canvas::DrawPointLine(int x1, int y1, int x2, int y2, const Color& color) {
DrawPointLine(x1, y1, x2, y2,
[color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw a line made of braille dots.
/// @param x1 the x coordinate of the first dot.
/// @param y1 the y coordinate of the first dot.o
/// @param x2 the x coordinate of the second dot.
/// @param y2 the y coordinate of the second dot.
/// @param style the style of the line.
void Canvas::DrawPointLine(int x1,
int y1,
int x2,
@ -163,54 +210,99 @@ void Canvas::DrawPointLine(int x1,
DrawPoint(x2, y2, true, style);
}
void Canvas::DrawPointCircle(int x1, int y1, int radius) {
DrawPointCircle(x1, y1, radius, [](Pixel&) {});
/// @brief Draw a circle made of braille dots.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
void Canvas::DrawPointCircle(int x, int y, int radius) {
DrawPointCircle(x, y, radius, [](Pixel&) {});
}
void Canvas::DrawPointCircle(int x1, int y1, int radius, const Color& color) {
DrawPointCircle(x1, y1, radius,
/// @brief Draw a circle made of braille dots.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
/// @param color the color of the circle.
void Canvas::DrawPointCircle(int x, int y, int radius, const Color& color) {
DrawPointCircle(x, y, radius,
[color](Pixel& p) { p.foreground_color = color; });
}
void Canvas::DrawPointCircle(int x1,
int y1,
/// @brief Draw a circle made of braille dots.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
/// @param style the style of the circle.
void Canvas::DrawPointCircle(int x,
int y,
int radius,
const Stylizer& style) {
DrawPointEllipse(x1, y1, radius, radius, style);
DrawPointEllipse(x, y, radius, radius, style);
}
void Canvas::DrawPointCircleFilled(int x1, int y1, int radius) {
DrawPointCircleFilled(x1, y1, radius, [](Pixel&) {});
/// @brief Draw a filled circle made of braille dots.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
void Canvas::DrawPointCircleFilled(int x, int y, int radius) {
DrawPointCircleFilled(x, y, radius, [](Pixel&) {});
}
void Canvas::DrawPointCircleFilled(int x1,
int y1,
/// @brief Draw a filled circle made of braille dots.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
/// @param color the color of the circle.
void Canvas::DrawPointCircleFilled(int x,
int y,
int radius,
const Color& color) {
DrawPointCircleFilled(x1, y1, radius,
DrawPointCircleFilled(x, y, radius,
[color](Pixel& p) { p.foreground_color = color; });
}
void Canvas::DrawPointCircleFilled(int x1,
int y1,
/// @brief Draw a filled circle made of braille dots.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
/// @param style the style of the circle.
void Canvas::DrawPointCircleFilled(int x,
int y,
int radius,
const Stylizer& style) {
DrawPointEllipseFilled(x1, y1, radius, radius, style);
DrawPointEllipseFilled(x, y, radius, radius, style);
}
void Canvas::DrawPointEllipse(int x1, int y1, int r1, int r2) {
DrawPointEllipse(x1, y1, r1, r2, [](Pixel&) {});
/// @brief Draw an ellipse made of braille dots.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
void Canvas::DrawPointEllipse(int x, int y, int r1, int r2) {
DrawPointEllipse(x, y, r1, r2, [](Pixel&) {});
}
void Canvas::DrawPointEllipse(int x1,
int y1,
/// @brief Draw an ellipse made of braille dots.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
/// @param color the color of the ellipse.
void Canvas::DrawPointEllipse(int x,
int y,
int r1,
int r2,
const Color& color) {
DrawPointEllipse(x1, y1, r1, r2,
DrawPointEllipse(x, y, r1, r2,
[color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw an ellipse made of braille dots.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
/// @param style the style of the ellipse.
void Canvas::DrawPointEllipse(int x1,
int y1,
int r1,
@ -245,10 +337,21 @@ void Canvas::DrawPointEllipse(int x1,
}
}
/// @brief Draw a filled ellipse made of braille dots.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
void Canvas::DrawPointEllipseFilled(int x1, int y1, int r1, int r2) {
DrawPointEllipseFilled(x1, y1, r1, r2, [](Pixel&) {});
}
/// @brief Draw a filled ellipse made of braille dots.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
/// @param color the color of the ellipse.
void Canvas::DrawPointEllipseFilled(int x1,
int y1,
int r1,
@ -258,6 +361,12 @@ void Canvas::DrawPointEllipseFilled(int x1,
[color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw a filled ellipse made of braille dots.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
/// @param style the style of the ellipse.
void Canvas::DrawPointEllipseFilled(int x1,
int y1,
int r1,
@ -293,14 +402,28 @@ void Canvas::DrawPointEllipseFilled(int x1,
}
}
/// @brief Draw a block.
/// @param x the x coordinate of the block.
/// @param y the y coordinate of the block.
/// @param value whether the block is filled or not.
void Canvas::DrawBlock(int x, int y, bool value) {
DrawBlock(x, y, value, [](Pixel&) {});
}
/// @brief Draw a block.
/// @param x the x coordinate of the block.
/// @param y the y coordinate of the block.
/// @param value whether the block is filled or not.
/// @param color the color of the block.
void Canvas::DrawBlock(int x, int y, bool value, const Color& color) {
DrawBlock(x, y, value, [color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw a block.
/// @param x the x coordinate of the block.
/// @param y the y coordinate of the block.
/// @param value whether the block is filled or not.
/// @param style the style of the block.
void Canvas::DrawBlock(int x, int y, bool value, const Stylizer& style) {
Style(x, y, style);
if (value)
@ -309,6 +432,9 @@ void Canvas::DrawBlock(int x, int y, bool value, const Stylizer& style) {
DrawBlockOff(x, y);
}
/// @brief Draw a block.
/// @param x the x coordinate of the block.
/// @param y the y coordinate of the block.
void Canvas::DrawBlockOn(int x, int y) {
if (!IsIn(x, y))
return;
@ -325,6 +451,9 @@ void Canvas::DrawBlockOn(int x, int y) {
cell.content.character = g_map_block[value];
}
/// @brief Erase a block.
/// @param x the x coordinate of the block.
/// @param y the y coordinate of the block.
void Canvas::DrawBlockOff(int x, int y) {
if (!IsIn(x, y))
return;
@ -341,6 +470,10 @@ void Canvas::DrawBlockOff(int x, int y) {
cell.content.character = g_map_block[value];
}
/// @brief Toggle a block. If it is filled, it will be erased. If it is empty,
/// it will be filled.
/// @param x the x coordinate of the block.
/// @param y the y coordinate of the block.
void Canvas::DrawBlockToggle(int x, int y) {
if (!IsIn(x, y))
return;
@ -357,15 +490,32 @@ void Canvas::DrawBlockToggle(int x, int y) {
cell.content.character = g_map_block[value];
}
/// @brief Draw a line made of block characters.
/// @param x1 the x coordinate of the first point of the line.
/// @param y1 the y coordinate of the first point of the line.
/// @param x2 the x coordinate of the second point of the line.
/// @param y2 the y coordinate of the second point of the line.
void Canvas::DrawBlockLine(int x1, int y1, int x2, int y2) {
DrawBlockLine(x1, y1, x2, y2, [](Pixel&) {});
}
/// @brief Draw a line made of block characters.
/// @param x1 the x coordinate of the first point of the line.
/// @param y1 the y coordinate of the first point of the line.
/// @param x2 the x coordinate of the second point of the line.
/// @param y2 the y coordinate of the second point of the line.
/// @param color the color of the line.
void Canvas::DrawBlockLine(int x1, int y1, int x2, int y2, const Color& color) {
DrawBlockLine(x1, y1, x2, y2,
[color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw a line made of block characters.
/// @param x1 the x coordinate of the first point of the line.
/// @param y1 the y coordinate of the first point of the line.
/// @param x2 the x coordinate of the second point of the line.
/// @param y2 the y coordinate of the second point of the line.
/// @param style the style of the line.
void Canvas::DrawBlockLine(int x1,
int y1,
int x2,
@ -400,54 +550,99 @@ void Canvas::DrawBlockLine(int x1,
DrawBlock(x2, y2 * 2, true, style);
}
void Canvas::DrawBlockCircle(int x1, int y1, int radius) {
DrawBlockCircle(x1, y1, radius, [](Pixel&) {});
/// @brief Draw a circle made of block characters.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
void Canvas::DrawBlockCircle(int x, int y, int radius) {
DrawBlockCircle(x, y, radius, [](Pixel&) {});
}
void Canvas::DrawBlockCircle(int x1, int y1, int radius, const Color& color) {
DrawBlockCircle(x1, y1, radius,
/// @brief Draw a circle made of block characters.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
/// @param color the color of the circle.
void Canvas::DrawBlockCircle(int x, int y, int radius, const Color& color) {
DrawBlockCircle(x, y, radius,
[color](Pixel& p) { p.foreground_color = color; });
}
void Canvas::DrawBlockCircle(int x1,
int y1,
/// @brief Draw a circle made of block characters.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
/// @param style the style of the circle.
void Canvas::DrawBlockCircle(int x,
int y,
int radius,
const Stylizer& style) {
DrawBlockEllipse(x1, y1, radius, radius, style);
DrawBlockEllipse(x, y, radius, radius, style);
}
void Canvas::DrawBlockCircleFilled(int x1, int y1, int radius) {
DrawBlockCircleFilled(x1, y1, radius, [](Pixel&) {});
/// @brief Draw a filled circle made of block characters.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
void Canvas::DrawBlockCircleFilled(int x, int y, int radius) {
DrawBlockCircleFilled(x, y, radius, [](Pixel&) {});
}
void Canvas::DrawBlockCircleFilled(int x1,
int y1,
/// @brief Draw a filled circle made of block characters.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
/// @param color the color of the circle.
void Canvas::DrawBlockCircleFilled(int x,
int y,
int radius,
const Color& color) {
DrawBlockCircleFilled(x1, y1, radius,
DrawBlockCircleFilled(x, y, radius,
[color](Pixel& p) { p.foreground_color = color; });
}
void Canvas::DrawBlockCircleFilled(int x1,
int y1,
/// @brief Draw a filled circle made of block characters.
/// @param x the x coordinate of the center of the circle.
/// @param y the y coordinate of the center of the circle.
/// @param radius the radius of the circle.
/// @param style the style of the circle.
void Canvas::DrawBlockCircleFilled(int x,
int y,
int radius,
const Stylizer& s) {
DrawBlockEllipseFilled(x1, y1, radius, radius, s);
DrawBlockEllipseFilled(x, y, radius, radius, s);
}
void Canvas::DrawBlockEllipse(int x1, int y1, int r1, int r2) {
DrawBlockEllipse(x1, y1, r1, r2, [](Pixel&) {});
/// @brief Draw an ellipse made of block characters.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
void Canvas::DrawBlockEllipse(int x, int y, int r1, int r2) {
DrawBlockEllipse(x, y, r1, r2, [](Pixel&) {});
}
void Canvas::DrawBlockEllipse(int x1,
int y1,
/// @brief Draw an ellipse made of block characters.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
/// @param color the color of the ellipse.
void Canvas::DrawBlockEllipse(int x,
int y,
int r1,
int r2,
const Color& color) {
DrawBlockEllipse(x1, y1, r1, r2,
DrawBlockEllipse(x, y, r1, r2,
[color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw an ellipse made of block characters.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
/// @param style the style of the ellipse.
void Canvas::DrawBlockEllipse(int x1,
int y1,
int r1,
@ -484,19 +679,36 @@ void Canvas::DrawBlockEllipse(int x1,
}
}
void Canvas::DrawBlockEllipseFilled(int x1, int y1, int r1, int r2) {
DrawBlockEllipseFilled(x1, y1, r1, r2, [](Pixel&) {});
/// @brief Draw a filled ellipse made of block characters.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
void Canvas::DrawBlockEllipseFilled(int x, int y, int r1, int r2) {
DrawBlockEllipseFilled(x, y, r1, r2, [](Pixel&) {});
}
void Canvas::DrawBlockEllipseFilled(int x1,
int y1,
/// @brief Draw a filled ellipse made of block characters.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
/// @param color the color of the ellipse.
void Canvas::DrawBlockEllipseFilled(int x,
int y,
int r1,
int r2,
const Color& color) {
DrawBlockEllipseFilled(x1, y1, r1, r2,
DrawBlockEllipseFilled(x, y, r1, r2,
[color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw a filled ellipse made of block characters.
/// @param x the x coordinate of the center of the ellipse.
/// @param y the y coordinate of the center of the ellipse.
/// @param r1 the radius of the ellipse along the x axis.
/// @param r2 the radius of the ellipse along the y axis.
/// @param style the style of the ellipse.
void Canvas::DrawBlockEllipseFilled(int x1,
int y1,
int r1,
@ -534,10 +746,19 @@ void Canvas::DrawBlockEllipseFilled(int x1,
}
}
/// @brief Draw a piece of text.
/// @param x the x coordinate of the text.
/// @param y the y coordinate of the text.
/// @param value the text to draw.
void Canvas::DrawText(int x, int y, const std::string& value) {
DrawText(x, y, value, [](Pixel&) {});
}
/// @brief Draw a piece of text.
/// @param x the x coordinate of the text.
/// @param y the y coordinate of the text.
/// @param value the text to draw.
/// @param color the color of the text.
void Canvas::DrawText(int x,
int y,
const std::string& value,
@ -545,23 +766,28 @@ void Canvas::DrawText(int x,
DrawText(x, y, value, [color](Pixel& p) { p.foreground_color = color; });
}
/// @brief Draw a piece of text.
/// @param x the x coordinate of the text.
/// @param y the y coordinate of the text.
/// @param value the text to draw.
/// @param style the style of the text.
void Canvas::DrawText(int x,
int y,
const std::string& value,
const Stylizer& style) {
x /= 2;
y /= 4;
for (const auto& it : Utf8ToGlyphs(value)) {
if (!IsIn(x, y))
continue;
Cell& cell = storage_[XY{x, y}];
Cell& cell = storage_[XY{x / 2, y / 4}];
cell.type = CellType::kText;
cell.content.character = it;
style(cell.content);
x++;
x+=2;
}
}
/// @brief Modify a pixel at a given location.
/// @param style a function that modifies the pixel.
void Canvas::Style(int x, int y, const Stylizer& style) {
if (IsIn(x, y))
style(storage_[XY{x / 2, y / 4}].content);
@ -575,11 +801,11 @@ class CanvasNodeBase : public Node {
void Render(Screen& screen) override {
const Canvas& c = canvas();
int y_max = std::min(c.width() * 2, box_.y_max - box_.y_min + 1);
int x_max = std::min(c.height() * 4, box_.x_max - box_.x_min + 1);
int y_max = std::min(c.height() / 4, box_.y_max - box_.y_min + 1);
int x_max = std::min(c.width() / 2, box_.x_max - box_.x_min + 1);
for (int y = 0; y < y_max; ++y) {
for (int x = 0; x < x_max; ++x) {
screen.PixelAt(box_.x_min + x, box_.y_min + y) = c.GetPixel(x * 2, y * 4);
screen.PixelAt(box_.x_min + x, box_.y_min + y) = c.GetPixel(x, y);
}
}
}
@ -589,6 +815,7 @@ class CanvasNodeBase : public Node {
} // namespace
/// @brief Produce an element from a Canvas, or a reference to a Canvas.
Element canvas(ConstRef<Canvas> canvas) {
class Impl : public CanvasNodeBase {
public:
@ -602,6 +829,10 @@ Element canvas(ConstRef<Canvas> canvas) {
return std::make_shared<Impl>(std::move(canvas));
}
/// @brief Produce an element drawing a canvas of requested size.
/// @param width the width of the canvas.
/// @param height the height of the canvas.
/// @param fn a function drawing the canvas.
Element canvas(int width, int height, std::function<void(Canvas&)> fn) {
class Impl : public CanvasNodeBase {
public:
@ -630,6 +861,8 @@ Element canvas(int width, int height, std::function<void(Canvas&)> fn) {
return std::make_shared<Impl>(width, height, std::move(fn));
}
/// @brief Produce an element drawing a canvas.
/// @param fn a function drawing the canvas.
Element canvas(std::function<void(Canvas&)> fn) {
return canvas(12, 12, std::move(fn));
}