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Use vscroll_indicator in examples.

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This commit is contained in:
ArthurSonzogni 2021-09-26 17:30:41 +02:00 committed by Arthur Sonzogni
parent 535974d291
commit 84287eb217
5 changed files with 35 additions and 27 deletions
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3
examples/component/checkbox_in_frame.cpp
View File

@ -24,7 +24,8 @@ int main(int argc, const char* argv[]) {
}
auto renderer = Renderer(container, [&] {
return container->Render() | frame | size(HEIGHT, LESS_THAN, 10) | border;
return container->Render() | vscroll_indicator | frame |
size(HEIGHT, LESS_THAN, 10) | border;
});
auto screen = ScreenInteractive::FitComponent();

14
examples/component/homescreen.cpp
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@ -214,12 +214,13 @@ int main(int argc, const char* argv[]) {
};
auto compiler_renderer = Renderer(compiler_component, [&] {
auto compiler_win = window(text("Compiler"), compiler->Render() | frame);
auto flags_win = window(text("Flags"), flags->Render() | frame);
auto compiler_win = window(text("Compiler"),
compiler->Render() | vscroll_indicator | frame);
auto flags_win =
window(text("Flags"), flags->Render() | vscroll_indicator | frame);
auto executable_win = window(text("Executable:"), executable_->Render());
auto input_win =
window(text("Input"),
hbox({
window(text("Input"), hbox({
vbox({
hbox({
text("Add: "),
@ -229,7 +230,8 @@ int main(int argc, const char* argv[]) {
filler(),
}),
separator(),
input->Render() | frame | size(HEIGHT, EQUAL, 3) | flex,
input->Render() | vscroll_indicator | frame |
size(HEIGHT, EQUAL, 3) | flex,
}));
return vbox({
hbox({
@ -240,7 +242,7 @@ int main(int argc, const char* argv[]) {
input_win | size(WIDTH, EQUAL, 60),
}),
filler(),
}) | size(HEIGHT, LESS_THAN, 6),
}) | size(HEIGHT, LESS_THAN, 8),
hflow(render_command()) | flex_grow,
}) |
flex_grow | border;

3
examples/component/menu_in_frame.cpp
View File

@ -18,7 +18,8 @@ int main(int argc, const char* argv[]) {
entries.push_back("Entry " + std::to_string(i));
auto radiobox = Menu(&entries, &selected);
auto renderer = Renderer(radiobox, [&] {
return radiobox->Render() | frame | size(HEIGHT, LESS_THAN, 10) | border;
return radiobox->Render() | vscroll_indicator | frame |
size(HEIGHT, LESS_THAN, 10) | border;
});
auto screen = ScreenInteractive::FitComponent();

3
examples/component/radiobox_in_frame.cpp
View File

@ -18,7 +18,8 @@ int main(int argc, const char* argv[]) {
entries.push_back("RadioBox " + std::to_string(i));
auto radiobox = Radiobox(&entries, &selected);
auto renderer = Renderer(radiobox, [&] {
return radiobox->Render() | frame | size(HEIGHT, LESS_THAN, 10) | border;
return radiobox->Render() | vscroll_indicator | frame |
size(HEIGHT, LESS_THAN, 10) | border;
});
auto screen = ScreenInteractive::FitComponent();

19
src/ftxui/dom/scroll_indicator.cpp
View File

@ -31,17 +31,20 @@ Element vscroll_indicator(Element child) {
const Box& stencil = screen.stencil;
float size_inner = box_.y_max - box_.y_min;
float size_outter = stencil.y_max - stencil.y_min;
float start_y = stencil.y_min +
(stencil.y_min - box_.y_min) * size_outter / size_inner;
float end_y = stencil.y_min +
(stencil.y_max - box_.y_min) * size_outter / size_inner;
int size_inner = box_.y_max - box_.y_min;
int size_outter = stencil.y_max - stencil.y_min;
if (size_outter >= size_inner)
return;
int start_y = 2 * stencil.y_min + 2 * float(stencil.y_min - box_.y_min) *
(size_outter - 1) / size_inner;
int size = 2 * float(size_outter) * (size_outter - 1) / size_inner + 2;
size = std::max(size, 1);
const int x = stencil.x_max;
for (int y = stencil.y_min; y <= stencil.y_max; ++y) {
bool up = (2 * y + -1 >= 2 * start_y) && (2 * y + -1 <= 2 * end_y);
bool down = (2 * y + 0 >= 2 * start_y) && (2 * y + 0 <= 2 * end_y);
bool up = (2 * y + -1 >= start_y) && (2 * y - 1 <= start_y + size);
bool down = (2 * y - 0 >= start_y) && (2 * y - 0 <= start_y + size);
const char* c = up ? (down ? "┃" : "╹") : (down ? "╻" : " ");
screen.PixelAt(x, y).character = c;