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#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/Brush.h"
#include "cru/platform/graphics/Factory.h"
#include "cru/platform/graphics/Font.h"
#include "cru/platform/graphics/Painter.h"
#include "cru/platform/graphics/TextLayout.h"
#include "cru/platform/gui/InputMethod.h"
#include "cru/platform/gui/UiApplication.h"
#include "cru/platform/gui/Window.h"
using namespace cru;
using namespace cru::platform;
using namespace cru::platform::graphics;
using namespace cru::platform::gui;
struct DemoBrushes {
std::unique_ptr<ISolidColorBrush> black;
std::unique_ptr<ISolidColorBrush> odd_clause;
std::unique_ptr<ISolidColorBrush> even_clause;
std::unique_ptr<ISolidColorBrush> target_clause;
};
class DemoWindow {
public:
DemoWindow(IUiApplication* application, DemoBrushes* brushes,
std::shared_ptr<IFont> font);
private:
DemoBrushes* brushes_;
std::unique_ptr<INativeWindow> window_;
std::unique_ptr<ITextLayout> prompt_text_layout_;
std::unique_ptr<ITextLayout> committed_text_layout_;
String committed_text_;
CompositionText composition_text_;
};
DemoWindow::DemoWindow(IUiApplication* application, DemoBrushes* brushes,
std::shared_ptr<IFont> font)
: brushes_(brushes) {
auto graphics_factory = application->GetGraphicsFactory();
window_ = std::unique_ptr<INativeWindow>(application->CreateWindow());
auto input_method_context = window_->GetInputMethodContext();
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.");
committed_text_layout_ = graphics_factory->CreateTextLayout(font, u"");
auto update_text_layout_width = [this](const Size& size) {
prompt_text_layout_->SetMaxWidth(size.width);
committed_text_layout_->SetMaxWidth(size.width);
};
update_text_layout_width(window_->GetClientSize());
window_->ResizeEvent()->AddHandler(update_text_layout_width);
window_->PaintEvent()->AddSpyOnlyHandler([this]() {
auto painter = window_->BeginPaint();
painter->Clear(colors::white);
painter->DrawText(Point{}, prompt_text_layout_.get(),
brushes_->black.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 = committed_text_layout_->TextRangeRect(
TextRange::FromTwoSides(clause.start - committed_text_.size(),
clause.end - committed_text_.size()));
const auto& b = clause.target ? brushes_->target_clause
: (i % 2 ? brushes_->odd_clause
: brushes_->even_clause);
for (auto& rect : rects) {
painter->FillRectangle(rect, b.get());
}
}
painter->DrawText(Point{}, committed_text_layout_.get(),
brushes_->black.get());
const auto cursor_pos = composition_text_.selection.position +
static_cast<int>(committed_text_.size());
auto cursor_rect =
committed_text_layout_->TextSinglePoint(cursor_pos, false);
painter->FillRectangle(
Rect{cursor_rect.left, cursor_rect.top, 3, cursor_rect.height},
brushes_->black.get());
painter->PopState();
painter->EndDraw();
});
window_->KeyDownEvent()->AddHandler([this](const NativeKeyEventArgs& args) {
auto input_method_context = window_->GetInputMethodContext();
if (args.modifier & KeyModifiers::ctrl) {
switch (args.key) {
case KeyCode::N1:
input_method_context->EnableIME();
break;
case KeyCode::N2:
input_method_context->DisableIME();
break;
case KeyCode::N3:
input_method_context->CompleteComposition();
break;
case KeyCode::N4:
input_method_context->CancelComposition();
break;
default:
break;
}
}
});
auto update_state = [this] {
auto input_method_context = window_->GetInputMethodContext();
committed_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());
auto cursor_rect =
committed_text_layout_->TextSinglePoint(cursor_pos, false);
input_method_context->SetCandidateWindowPosition(
{cursor_rect.left, y + cursor_rect.GetBottom()});
window_->RequestRepaint();
};
input_method_context->TextEvent()->AddHandler(
[this, update_state](const StringView& c) {
committed_text_ += c;
update_state();
});
input_method_context->CompositionEvent()->AddHandler(
[this, update_state](std::nullptr_t) {
auto input_method_context = window_->GetInputMethodContext();
composition_text_ = input_method_context->GetCompositionText();
update_state();
});
input_method_context->CompositionEndEvent()->AddHandler(
[this, update_state](std::nullptr_t) {
composition_text_ = {};
update_state();
});
window_->SetVisibility(WindowVisibilityType::Show);
}
int main() {
IUiApplication* application = bootstrap::CreateUiApplication();
application->SetQuitOnAllWindowClosed(true);
auto graphics_factory = application->GetGraphicsFactory();
DemoBrushes brushes{graphics_factory->CreateSolidColorBrush(colors::black),
graphics_factory->CreateSolidColorBrush(colors::yellow),
graphics_factory->CreateSolidColorBrush(colors::green),
graphics_factory->CreateSolidColorBrush(colors::blue)};
std::shared_ptr<IFont> font = graphics_factory->CreateFont(String{}, 30);
DemoWindow window1(application, &brushes, font);
DemoWindow window2(application, &brushes, font);
return application->Run();
}
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