Add widgets (WIP)
This commit is contained in:
Jérôme Leclercq
230
src/Nazara/Widgets/Canvas.cpp
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230
src/Nazara/Widgets/Canvas.cpp
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// Copyright (C) 2020 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Widgets module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Widgets/Canvas.hpp>
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#include <limits>
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namespace Nz
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{
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std::size_t Canvas::RegisterWidget(BaseWidget* widget)
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{
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WidgetEntry box;
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box.cursor = widget->GetCursor();
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box.widget = widget;
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std::size_t index = m_widgetEntries.size();
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m_widgetEntries.emplace_back(box);
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NotifyWidgetBoxUpdate(index);
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return index;
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}
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void Canvas::UnregisterWidget(std::size_t index)
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{
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WidgetEntry& entry = m_widgetEntries[index];
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if (m_hoveredWidget == index)
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m_hoveredWidget = InvalidCanvasIndex;
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if (m_keyboardOwner == index)
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m_keyboardOwner = InvalidCanvasIndex;
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if (m_widgetEntries.size() > 1U)
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{
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WidgetEntry& lastEntry = m_widgetEntries.back();
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std::size_t lastEntryIndex = m_widgetEntries.size() - 1;
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entry = std::move(lastEntry);
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entry.widget->UpdateCanvasIndex(index);
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if (m_hoveredWidget == lastEntryIndex)
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m_hoveredWidget = index;
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if (m_keyboardOwner == lastEntryIndex)
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m_keyboardOwner = index;
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}
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m_widgetEntries.pop_back();
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}
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void Canvas::OnEventMouseButtonPressed(const Nz::EventHandler* /*eventHandler*/, const Nz::WindowEvent::MouseButtonEvent& event)
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{
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if (m_hoveredWidget != InvalidCanvasIndex)
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{
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WidgetEntry& hoveredWidget = m_widgetEntries[m_hoveredWidget];
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int x = static_cast<int>(std::round(event.x - hoveredWidget.box.x));
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int y = static_cast<int>(std::round(event.y - hoveredWidget.box.y));
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hoveredWidget.widget->OnMouseButtonPress(x, y, event.button);
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}
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}
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void Canvas::OnEventMouseButtonRelease(const Nz::EventHandler* /*eventHandler*/, const Nz::WindowEvent::MouseButtonEvent& event)
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{
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if (m_hoveredWidget != InvalidCanvasIndex)
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{
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WidgetEntry& hoveredWidget = m_widgetEntries[m_hoveredWidget];
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int x = static_cast<int>(std::round(event.x - hoveredWidget.box.x));
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int y = static_cast<int>(std::round(event.y - hoveredWidget.box.y));
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hoveredWidget.widget->OnMouseButtonRelease(x, y, event.button);
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}
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}
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void Canvas::OnEventMouseMoved(const Nz::EventHandler* /*eventHandler*/, const Nz::WindowEvent::MouseMoveEvent& event)
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{
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std::size_t bestEntry = InvalidCanvasIndex;
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float bestEntryArea = std::numeric_limits<float>::infinity();
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Nz::Vector3f mousePos(float(event.x), float(event.y), 0.f);
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for (std::size_t i = 0; i < m_widgetEntries.size(); ++i)
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{
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const Nz::Boxf& box = m_widgetEntries[i].box;
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if (box.Contains(mousePos))
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{
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float area = box.width * box.height;
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if (area < bestEntryArea)
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{
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bestEntry = i;
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bestEntryArea = area;
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}
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}
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}
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if (bestEntry != InvalidCanvasIndex)
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{
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if (m_hoveredWidget != bestEntry)
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{
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if (m_hoveredWidget != InvalidCanvasIndex)
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{
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WidgetEntry& previouslyHovered = m_widgetEntries[m_hoveredWidget];
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previouslyHovered.widget->OnMouseExit();
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}
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m_hoveredWidget = bestEntry;
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m_widgetEntries[m_hoveredWidget].widget->OnMouseEnter();
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if (m_cursorController)
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m_cursorController->UpdateCursor(Nz::Cursor::Get(m_widgetEntries[m_hoveredWidget].cursor));
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}
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WidgetEntry& hoveredWidget = m_widgetEntries[m_hoveredWidget];
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int x = static_cast<int>(std::round(event.x - hoveredWidget.box.x));
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int y = static_cast<int>(std::round(event.y - hoveredWidget.box.y));
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hoveredWidget.widget->OnMouseMoved(x, y, event.deltaX, event.deltaY);
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}
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else if (m_hoveredWidget != InvalidCanvasIndex)
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{
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m_widgetEntries[m_hoveredWidget].widget->OnMouseExit();
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m_hoveredWidget = InvalidCanvasIndex;
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if (m_cursorController)
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m_cursorController->UpdateCursor(Nz::Cursor::Get(Nz::SystemCursor::Default));
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}
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}
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void Canvas::OnEventMouseWheelMoved(const Nz::EventHandler* /*eventHandler*/, const Nz::WindowEvent::MouseWheelEvent& event)
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{
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if (m_hoveredWidget != InvalidCanvasIndex)
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{
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WidgetEntry& hoveredWidget = m_widgetEntries[m_hoveredWidget];
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int x = static_cast<int>(std::round(event.x - hoveredWidget.box.x));
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int y = static_cast<int>(std::round(event.y - hoveredWidget.box.y));
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hoveredWidget.widget->OnMouseWheelMoved(x, y, event.delta);
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}
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}
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void Canvas::OnEventMouseLeft(const Nz::EventHandler* /*eventHandler*/)
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{
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if (m_hoveredWidget != InvalidCanvasIndex)
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{
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m_widgetEntries[m_hoveredWidget].widget->OnMouseExit();
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m_hoveredWidget = InvalidCanvasIndex;
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}
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}
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void Canvas::OnEventKeyPressed(const Nz::EventHandler* eventHandler, const Nz::WindowEvent::KeyEvent& event)
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{
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if (m_keyboardOwner != InvalidCanvasIndex)
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{
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if (m_widgetEntries[m_keyboardOwner].widget->OnKeyPressed(event))
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return;
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if (event.virtualKey == Nz::Keyboard::VKey::Tab)
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{
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if (!event.shift)
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{
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// Forward
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for (std::size_t i = m_keyboardOwner + 1; i < m_widgetEntries.size(); ++i)
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{
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if (m_widgetEntries[i].widget->IsFocusable())
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{
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SetKeyboardOwner(i);
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return;
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}
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}
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for (std::size_t i = 0; i < m_keyboardOwner; ++i)
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{
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if (m_widgetEntries[i].widget->IsFocusable())
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{
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SetKeyboardOwner(i);
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return;
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}
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}
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}
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else
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{
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// Backward
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for (decltype(m_widgetEntries)::reverse_iterator rit{ m_widgetEntries.begin() + m_keyboardOwner }; rit != m_widgetEntries.rend(); ++rit)
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{
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if (rit->widget->IsFocusable())
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{
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SetKeyboardOwner(std::distance(m_widgetEntries.begin(), rit.base()) - 1);
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return;
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}
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}
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decltype(m_widgetEntries)::reverse_iterator rend { m_widgetEntries.begin() + m_keyboardOwner };
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for (auto rit = m_widgetEntries.rbegin(); rit != rend; ++rit)
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{
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if (rit->widget->IsFocusable())
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{
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SetKeyboardOwner(std::distance(m_widgetEntries.begin(), rit.base()) - 1);
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return;
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}
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}
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}
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}
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}
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OnUnhandledKeyPressed(eventHandler, event);
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}
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void Canvas::OnEventKeyReleased(const Nz::EventHandler* eventHandler, const Nz::WindowEvent::KeyEvent& event)
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{
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if (m_keyboardOwner != InvalidCanvasIndex)
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m_widgetEntries[m_keyboardOwner].widget->OnKeyReleased(event);
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OnUnhandledKeyReleased(eventHandler, event);
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}
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void Canvas::OnEventTextEntered(const Nz::EventHandler* /*eventHandler*/, const Nz::WindowEvent::TextEvent& event)
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{
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if (m_keyboardOwner != InvalidCanvasIndex)
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m_widgetEntries[m_keyboardOwner].widget->OnTextEntered(event.character, event.repeated);
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}
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void Canvas::OnEventTextEdited(const Nz::EventHandler* /*eventHandler*/, const Nz::WindowEvent::EditEvent& event)
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{
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if (m_keyboardOwner != InvalidCanvasIndex)
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m_widgetEntries[m_keyboardOwner].widget->OnTextEdited(event.text, event.length);
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}
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}
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