diff options
Diffstat (limited to 'CruUI/ui/controls/text_box.cpp')
| -rw-r--r-- | CruUI/ui/controls/text_box.cpp | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/CruUI/ui/controls/text_box.cpp b/CruUI/ui/controls/text_box.cpp new file mode 100644 index 00000000..ce834ef6 --- /dev/null +++ b/CruUI/ui/controls/text_box.cpp @@ -0,0 +1,215 @@ +#include "text_box.h" + +#include "graph/graph.h" +#include "exception.h" + +namespace cru::ui::controls +{ + using graph::CreateSolidBrush; + + inline Microsoft::WRL::ComPtr<IDWriteFactory> GetDWriteFactory() + { + return graph::GraphManager::GetInstance()->GetDWriteFactory(); + } + + TextBox::TextBox(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& init_text_format, + const Microsoft::WRL::ComPtr<ID2D1Brush>& init_brush) : Control(false) + { + text_format_ = init_text_format; + + if (init_brush == nullptr) + brush_ = CreateSolidBrush(D2D1::ColorF(D2D1::ColorF::Black)); + else + brush_ = init_brush; + + caret_brush_ = CreateSolidBrush(D2D1::ColorF(D2D1::ColorF::Black)); + + //selection_brush_ = CreateSolidBrush(D2D1::ColorF(D2D1::ColorF::LightSkyBlue)); + } + + TextBox::~TextBox() = default; + + void TextBox::SetText(const String& text) + { + if (text_ != text) + { + const auto old_text = text_; + text_ = text; + OnTextChangedCore(old_text, text); + } + } + + void TextBox::SetBrush(const Microsoft::WRL::ComPtr<ID2D1Brush>& brush) + { + brush_ = brush; + Repaint(); + } + + void TextBox::SetTextFormat(const Microsoft::WRL::ComPtr<IDWriteTextFormat>& text_format) + { + text_format_ = text_format; + RecreateTextLayout(); + Repaint(); + } + + void TextBox::OnSizeChangedCore(events::SizeChangedEventArgs& args) + { + Control::OnSizeChangedCore(args); + text_layout_->SetMaxWidth(args.GetNewSize().width); + text_layout_->SetMaxHeight(args.GetNewSize().height); + Repaint(); + } + + void TextBox::OnDraw(ID2D1DeviceContext* device_context) + { + Control::OnDraw(device_context); + if (text_layout_ != nullptr) + { + //if (selected_range_.has_value()) + //{ + // DWRITE_TEXT_METRICS text_metrics{}; + // ThrowIfFailed(text_layout_->GetMetrics(&text_metrics)); + // const auto metrics_count = text_metrics.lineCount * text_metrics.maxBidiReorderingDepth; + + // Vector<DWRITE_HIT_TEST_METRICS> hit_test_metrics(metrics_count); + // UINT32 actual_count; + // text_layout_->HitTestTextRange( + // selected_range_.value().position, selected_range_.value().count, + // 0, 0, + // hit_test_metrics.data(), metrics_count, &actual_count + // ); + + // hit_test_metrics.erase(hit_test_metrics.cbegin() + actual_count, hit_test_metrics.cend()); + + // for (const auto& metrics : hit_test_metrics) + // { + // device_context->FillRoundedRectangle(D2D1::RoundedRect(D2D1::RectF(metrics.left, metrics.top, metrics.left + metrics.width, metrics.top + metrics.height), 3, 3), selection_brush_.Get()); + // } + //} + device_context->DrawTextLayout(D2D1::Point2F(), text_layout_.Get(), brush_.Get()); + } + } + + std::optional<unsigned> TextLayoutHitTest(IDWriteTextLayout* text_layout, const Point& point, bool test_inside = true) + { + BOOL is_trailing, is_inside; + DWRITE_HIT_TEST_METRICS metrics{}; + text_layout->HitTestPoint(point.x, point.y, &is_trailing, &is_inside, &metrics); + if (!test_inside || is_inside) + return is_trailing == 0 ? metrics.textPosition : metrics.textPosition + 1; + else + return std::nullopt; + } + + void TextBox::OnMouseDownCore(events::MouseButtonEventArgs& args) + { + Control::OnMouseDownCore(args); + if (args.GetMouseButton() == MouseButton::Left) + { + position_ = TextLayoutHitTest(text_layout_.Get(), args.GetPoint(this), false).value(); + + Repaint(); + } + } + + void TextBox::OnGetFocusCore(events::FocusChangeEventArgs& args) + { + Control::OnGetFocusCore(args); + assert(caret_timer_ == nullptr); + caret_timer_ = SetInterval(Application::GetInstance()->GetCaretBlinkDuration(), caret_action_); + } + + void TextBox::OnLoseFocusCore(events::FocusChangeEventArgs& args) + { + Control::OnLoseFocusCore(args); + assert(caret_timer_ != nullptr); + caret_timer_->Cancel(); + } + + Size TextBox::OnMeasure(const Size& available_size) + { + if (text_.empty()) + return Size::Zero(); + + const auto layout_params = GetLayoutParams(); + + if (layout_params->width.mode == MeasureMode::Stretch && layout_params->height.mode == MeasureMode::Stretch) + return available_size; + + auto&& get_measure_length = [](const LayoutSideParams& layout_length, const float available_length) -> float + { + switch (layout_length.mode) + { + case MeasureMode::Exactly: + { + return std::min(layout_length.length, available_length); + } + case MeasureMode::Stretch: + case MeasureMode::Content: + { + return available_length; + } + default: + UnreachableCode(); + } + }; + + const Size measure_size(get_measure_length(layout_params->width, available_size.width), + get_measure_length(layout_params->height, available_size.height)); + + ThrowIfFailed(text_layout_->SetMaxWidth(measure_size.width)); + ThrowIfFailed(text_layout_->SetMaxHeight(measure_size.height)); + + DWRITE_TEXT_METRICS metrics{}; + + ThrowIfFailed(text_layout_->GetMetrics(&metrics)); + + const Size measure_result(metrics.width, metrics.height); + + auto&& calculate_final_length = [](const LayoutSideParams& layout_length, const float measure_length, const float measure_result_length) -> float + { + if ((layout_length.mode == MeasureMode::Stretch || + layout_length.mode == MeasureMode::Exactly) + && measure_result_length < measure_length) + return measure_length; + else + return measure_result_length; + }; + + const Size result_size( + calculate_final_length(layout_params->width, measure_size.width, measure_result.width), + calculate_final_length(layout_params->height, measure_size.height, measure_result.height) + ); + + return result_size; + } + + void TextBox::OnTextChangedCore(const String& old_text, const String& new_text) + { + RecreateTextLayout(); + Repaint(); + } + + void TextBox::RecreateTextLayout() + { + if (text_.empty()) + { + text_layout_ = nullptr; + return; + } + + const auto dwrite_factory = GetDWriteFactory(); + + if (text_format_ == nullptr) + text_format_ = graph::CreateDefaultTextFormat(); + + const auto&& size = GetSize(); + + ThrowIfFailed(dwrite_factory->CreateTextLayout( + text_.c_str(), static_cast<UINT32>(text_.size()), + text_format_.Get(), + size.width, size.height, + &text_layout_ + )); + } +} |