diff options
Diffstat (limited to 'demos')
| -rw-r--r-- | demos/InputMethod/main.cpp | 98 |
1 files changed, 58 insertions, 40 deletions
diff --git a/demos/InputMethod/main.cpp b/demos/InputMethod/main.cpp index abbbed2c..fc63dd5e 100644 --- a/demos/InputMethod/main.cpp +++ b/demos/InputMethod/main.cpp @@ -1,4 +1,5 @@ #include "cru/platform/Color.h" +#include "cru/platform/GraphicsBase.h" #include "cru/platform/bootstrap/Bootstrap.h" #include "cru/platform/graphics/Factory.h" #include "cru/platform/graphics/Font.h" @@ -7,12 +8,20 @@ #include "cru/platform/gui/UiApplication.h" #include "cru/platform/gui/Window.h" -int main() { - using namespace cru; - using namespace cru::platform; - using namespace cru::platform::graphics; - using namespace cru::platform::gui; +#include <optional> + +using namespace cru; +using namespace cru::platform; +using namespace cru::platform::graphics; +using namespace cru::platform::gui; + +struct InputMethodState { + CompositionText composition_text; + Rect cursor_rect; + TextRange colored_text_range; +}; +int main() { IUiApplication* application = bootstrap::CreateUiApplication(); auto graphics_factory = application->GetGraphicsFactory(); @@ -33,22 +42,30 @@ int main() { std::shared_ptr<IFont> font = graphics_factory->CreateFont(String{}, 30); - float window_width = 10000; - auto prompt_text_layout = graphics_factory->CreateTextLayout(font, u"Ctrl+1: Enable IME\n" u"Ctrl+2: Disable IME\n" u"Ctrl+3: Complete composition.\n" u"Ctrl+4: Cancel composition."); + float anchor_y; - std::optional<CompositionText> optional_composition_text; String committed_text; + auto text_layout = graphics_factory->CreateTextLayout(font, u""); + std::optional<InputMethodState> state; + + auto update_text_layout_width = [&prompt_text_layout, &anchor_y, + &text_layout](float width) { + prompt_text_layout->SetMaxWidth(width); + text_layout->SetMaxWidth(width); + anchor_y = prompt_text_layout->GetTextBounds().height; + }; + + update_text_layout_width(window->GetClientSize().width); window->ResizeEvent()->AddHandler( - [&prompt_text_layout, &window_width](const Size& size) { - prompt_text_layout->SetMaxWidth(size.width); - window_width = size.width; + [&update_text_layout_width](const Size& size) { + update_text_layout_width(size.width); }); window->PaintEvent()->AddHandler([&](auto) { @@ -57,16 +74,8 @@ int main() { painter->DrawText(Point{}, prompt_text_layout.get(), brush.get()); - const auto anchor_y = prompt_text_layout->GetTextBounds().height; - - auto text_layout = graphics_factory->CreateTextLayout( - font, committed_text + (optional_composition_text - ? optional_composition_text->text - : u"")); - text_layout->SetMaxWidth(window_width); - - if (optional_composition_text) { - const auto& composition_text = *optional_composition_text; + if (state) { + const auto& composition_text = state->composition_text; for (int i = 0; i < static_cast<int>(composition_text.clauses.size()); i++) { @@ -85,19 +94,13 @@ int main() { painter->DrawText(Point{0, anchor_y}, text_layout.get(), brush.get()); - if (optional_composition_text) { - const auto& composition_text = *optional_composition_text; + if (state) { + const auto& composition_text = state->composition_text; + const auto& cursor_rect = state->cursor_rect; - const auto cursor_pos = composition_text.selection.position + - gsl::narrow_cast<int>(committed_text.size()); - - const auto cursor_lefttop = - text_layout->TextSinglePoint(cursor_pos, false); - - painter->FillRectangle( - Rect{cursor_lefttop.left, cursor_lefttop.top + anchor_y, 3, - cursor_lefttop.height}, - brush.get()); + painter->FillRectangle(Rect{cursor_rect.left, cursor_rect.top + anchor_y, + 3, cursor_rect.height}, + brush.get()); } painter->EndDraw(); @@ -131,15 +134,30 @@ int main() { window->RequestRepaint(); }); - input_method_context->CompositionEvent()->AddHandler( - [window, &input_method_context, &optional_composition_text](auto) { - optional_composition_text = input_method_context->GetCompositionText(); - window->RequestRepaint(); - }); + input_method_context->CompositionEvent()->AddHandler([window, + &input_method_context, + &committed_text, + &anchor_y, &state, + &text_layout](auto) { + const auto composition_text = input_method_context->GetCompositionText(); + state.emplace(); + state->composition_text = input_method_context->GetCompositionText(); + + text_layout->SetText(committed_text + composition_text.text); + + const auto cursor_pos = composition_text.selection.position + + gsl::narrow_cast<int>(committed_text.size()); + state->cursor_rect = text_layout->TextSinglePoint(cursor_pos, false); + + input_method_context->SetCandidateWindowPosition( + {state->cursor_rect.left, anchor_y + state->cursor_rect.GetBottom()}); + + window->RequestRepaint(); + }); input_method_context->CompositionEndEvent()->AddHandler( - [window, &optional_composition_text](auto) { - optional_composition_text = std::nullopt; + [window, &state](auto) { + state = std::nullopt; window->RequestRepaint(); }); |