78 lines
2.8 KiB
C
78 lines
2.8 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 "open3d/visualization/gui/Events.h"
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namespace open3d {
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namespace visualization {
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namespace gui {
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struct DrawContext;
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struct Theme;
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/// The menu item action is handled by Window, rather than by registering a
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/// a callback function with (non-existent) Menu::SetOnClicked(). This is
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/// because on macOS the menubar is global over all application windows, so any
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/// callback would need to go find the data object corresponding to the active
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/// window.
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class MenuBase {
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public:
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using ItemId = int;
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static constexpr ItemId NO_ITEM = -1;
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MenuBase() {}
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virtual ~MenuBase() {}
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virtual void AddItem(const char* name,
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ItemId item_id = NO_ITEM,
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KeyName key = KEY_NONE) = 0;
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virtual void AddMenu(const char* name,
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std::shared_ptr<MenuBase> submenu) = 0;
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virtual void AddSeparator() = 0;
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virtual void InsertItem(int index,
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const char* name,
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ItemId item_id = NO_ITEM,
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KeyName key = KEY_NONE) = 0;
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virtual void InsertMenu(int index,
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const char* name,
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std::shared_ptr<MenuBase> submenu) = 0;
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virtual void InsertSeparator(int index) = 0;
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virtual int GetNumberOfItems() const = 0;
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/// Searches the menu hierarchy down from this menu to find the item
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/// and returns true if the item is enabled.
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virtual bool IsEnabled(ItemId item_id) const = 0;
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/// Searches the menu hierarchy down from this menu to find the item
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/// and set it enabled according to \p enabled.
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virtual void SetEnabled(ItemId item_id, bool enabled) = 0;
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virtual bool IsChecked(ItemId item_id) const = 0;
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virtual void SetChecked(ItemId item_id, bool checked) = 0;
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virtual int CalcHeight(const Theme& theme) const = 0;
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/// Returns true if submenu visibility changed on last call to DrawMenuBar
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virtual bool CheckVisibilityChange() const = 0;
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virtual ItemId DrawMenuBar(const DrawContext& context, bool is_enabled) = 0;
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virtual ItemId Draw(const DrawContext& context,
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const char* name,
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bool is_enabled) = 0;
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virtual void* GetNativePointer() = 0; // nullptr if not using native menus
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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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