107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
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// ----------------------------------------------------------------------------
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// - Open3D: www.open3d.org -
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// ----------------------------------------------------------------------------
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// Copyright (c) 2018-2023 www.open3d.org
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// SPDX-License-Identifier: MIT
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// ----------------------------------------------------------------------------
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#pragma once
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#include <memory>
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#include <vector>
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#include "open3d/visualization/gui/Gui.h"
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#include "open3d/visualization/gui/Widget.h"
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namespace open3d {
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namespace visualization {
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namespace gui {
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/// \class WidgetProxy
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///
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/// \brief Widget container to delegate any widget dynamically.
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///
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/// Widget can not be managed dynamically. Although it is allowed
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/// to add more child widgets, it's impossible to replace some child
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/// with new on or remove children. WidgetProxy is designed to solve
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/// this problem.
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///
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/// When WidgetProxy is created, it's invisible and disabled, so it
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/// won't be drawn or layout, seeming like it does not exist. When
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/// a widget is set by \ref SetWidget, all \ref Widget's APIs will be
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/// conducted to that child widget. It looks like WidgetProxy is
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/// that widget.
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///
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/// At any time, a new widget could be set, to replace the old one.
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/// and the old widget will be destroyed.
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///
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/// Due to the content changing after a new widget is set or cleared,
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/// a relayout of Window might be called after SetWidget.
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///
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/// The delegated widget could be retrieved by \ref GetWidget in case you
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/// need to access it directly, like get check status of a CheckBox.
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///
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/// API other than \ref SetWidget and \ref GetWidget has completely
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/// same function as \ref Widget.
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class WidgetProxy : public Widget {
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public:
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WidgetProxy();
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~WidgetProxy() override;
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void AddChild(std::shared_ptr<Widget> child) override;
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const std::vector<std::shared_ptr<Widget>> GetChildren() const override;
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/// \brief set a new widget to be delegated by this one.
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///
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/// After SetWidget, the previously delegated widget will be abandon,
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/// all calls to \ref Widget's API will be conducted to \p widget.
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///
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/// Before any SetWidget call, this widget is invisible and disabled,
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/// seems it does not exist because it won't be drawn or in a layout.
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///
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/// \param widget Any widget to be delegated. Set to NULL to clear
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/// current delegated proxy.
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virtual void SetWidget(std::shared_ptr<Widget> widget);
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/// \brief Retrieve current delegated widget.
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///
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/// \return Instance of current delegated widget set by \ref SetWidget.
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/// An empty pointer will be returned if there is none.
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virtual std::shared_ptr<Widget> GetWidget();
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const Rect& GetFrame() const override;
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void SetFrame(const Rect& f) override;
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const Color& GetBackgroundColor() const override;
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bool IsDefaultBackgroundColor() const override;
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void SetBackgroundColor(const Color& color) override;
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bool IsVisible() const override;
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void SetVisible(bool vis) override;
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bool IsEnabled() const override;
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void SetEnabled(bool enabled) override;
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void SetTooltip(const char* text) override;
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const char* GetTooltip() const override;
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Size CalcPreferredSize(const LayoutContext& context,
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const Constraints& constraints) const override;
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Size CalcMinimumSize(const LayoutContext& context) const override;
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void Layout(const LayoutContext& context) override;
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DrawResult Draw(const DrawContext& context) override;
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EventResult Mouse(const MouseEvent& e) override;
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EventResult Key(const KeyEvent& e) override;
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DrawResult Tick(const TickEvent& e) override;
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protected:
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virtual std::shared_ptr<Widget> GetActiveWidget() const;
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private:
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struct Impl;
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std::unique_ptr<Impl> impl_;
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};
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} // namespace gui
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} // namespace visualization
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} // namespace open3d
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