diff options
Diffstat (limited to 'demos/InputMethod')
| -rw-r--r-- | demos/InputMethod/main.cpp | 122 |
1 files changed, 49 insertions, 73 deletions
diff --git a/demos/InputMethod/main.cpp b/demos/InputMethod/main.cpp index 430075f4..6c0fba3c 100644 --- a/demos/InputMethod/main.cpp +++ b/demos/InputMethod/main.cpp @@ -1,5 +1,6 @@ #include "cru/platform/Color.h" #include "cru/platform/GraphicsBase.h" +#include "cru/platform/Matrix.h" #include "cru/platform/bootstrap/Bootstrap.h" #include "cru/platform/graphics/Factory.h" #include "cru/platform/graphics/Font.h" @@ -8,19 +9,11 @@ #include "cru/platform/gui/UiApplication.h" #include "cru/platform/gui/Window.h" -#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(); application->SetQuitOnAllWindowClosed(true); @@ -49,61 +42,51 @@ int main() { u"Ctrl+2: Disable IME\n" u"Ctrl+3: Complete composition.\n" u"Ctrl+4: Cancel composition."); - float anchor_y; - String committed_text; auto text_layout = graphics_factory->CreateTextLayout(font, u""); - std::optional<InputMethodState> state; + CompositionText composition_text; - 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; + auto update_text_layout_width = [&prompt_text_layout, + &text_layout](const Size& size) { + prompt_text_layout->SetMaxWidth(size.width); + text_layout->SetMaxWidth(size.width); }; - update_text_layout_width(window->GetClientSize().width); - - window->ResizeEvent()->AddHandler( - [&update_text_layout_width](const Size& size) { - update_text_layout_width(size.width); - }); + update_text_layout_width(window->GetClientSize()); + window->ResizeEvent()->AddHandler(update_text_layout_width); - window->PaintEvent()->AddHandler([&](auto) { + window->PaintEvent()->AddSpyOnlyHandler([&]() { auto painter = window->BeginPaint(); painter->Clear(colors::white); painter->DrawText(Point{}, prompt_text_layout.get(), brush.get()); - - if (state) { - const auto& composition_text = state->composition_text; - - for (int i = 0; i < static_cast<int>(composition_text.clauses.size()); - i++) { - const auto& clause = composition_text.clauses[i]; - auto rects = text_layout->TextRangeRect(TextRange::FromTwoSides( - clause.start, clause.end, committed_text.size())); - const auto& b = clause.target - ? target_clause_brush - : (i % 2 ? odd_clause_brush : even_clause_brush); - for (auto& rect : rects) { - rect.top += anchor_y; - painter->FillRectangle(rect, b.get()); - } + painter->PushState(); + painter->ConcatTransform( + Matrix::Translation(0, prompt_text_layout->GetTextBounds().height)); + + for (int i = 0; i < static_cast<int>(composition_text.clauses.size()); + i++) { + const auto& clause = composition_text.clauses[i]; + auto rects = text_layout->TextRangeRect(TextRange::FromTwoSides( + clause.start, clause.end, committed_text.size())); + const auto& b = clause.target + ? target_clause_brush + : (i % 2 ? odd_clause_brush : even_clause_brush); + for (auto& rect : rects) { + painter->FillRectangle(rect, b.get()); } } - painter->DrawText(Point{0, anchor_y}, text_layout.get(), brush.get()); - - if (state) { - const auto& composition_text = state->composition_text; - const auto& cursor_rect = state->cursor_rect; + painter->DrawText(Point{}, text_layout.get(), brush.get()); - painter->FillRectangle(Rect{cursor_rect.left, cursor_rect.top + anchor_y, - 3, cursor_rect.height}, - brush.get()); - } + const auto cursor_pos = composition_text.selection.position + + static_cast<int>(committed_text.size()); + auto cursor_rect = text_layout->TextSinglePoint(cursor_pos, false); + painter->FillRectangle( + Rect{cursor_rect.left, cursor_rect.top, 3, cursor_rect.height}, + brush.get()); + painter->PopState(); painter->EndDraw(); }); @@ -129,38 +112,31 @@ int main() { } }); - input_method_context->TextEvent()->AddHandler( - [window, &committed_text](const StringView& c) { - committed_text += c; - 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(); - + auto update_state = [&] { text_layout->SetText(committed_text + composition_text.text); - + auto y = prompt_text_layout->GetTextBounds().height; const auto cursor_pos = composition_text.selection.position + static_cast<int>(committed_text.size()); - state->cursor_rect = text_layout->TextSinglePoint(cursor_pos, false); - + auto cursor_rect = text_layout->TextSinglePoint(cursor_pos, false); input_method_context->SetCandidateWindowPosition( - {state->cursor_rect.left, anchor_y + state->cursor_rect.GetBottom()}); - + {cursor_rect.left, cursor_rect.GetBottom()}); window->RequestRepaint(); + }; + + input_method_context->TextEvent()->AddHandler([&](const StringView& c) { + committed_text += c; + update_state(); }); - input_method_context->CompositionEndEvent()->AddHandler( - [window, &state](auto) { - state = std::nullopt; - window->RequestRepaint(); - }); + input_method_context->CompositionEvent()->AddHandler([&](auto) { + composition_text = input_method_context->GetCompositionText(); + update_state(); + }); + + input_method_context->CompositionEndEvent()->AddHandler([&](auto) { + composition_text = {}; + update_state(); + }); window->SetVisibility(WindowVisibilityType::Show); |