ImGuiMenu.h

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#pragma  once
// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2018 Jérémie Dumas <jeremie.dumas@ens-lyon.org>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.
 
#include "MRViewerPlugin.h"
#include "MRViewerEventsListener.h"
#include "MRStatePlugin.h"
#include "MRNotificationType.h"
#include "MRSignalCombiners.h"
#include "MRShowModal.h"
#include "MRMesh/MRIRenderObject.h" //only for BasicUiRenderTask::BackwardPassParams
#include "MRMesh/MRFlagOperators.h"
#include "MRMesh/MRBox.h"
#include <unordered_map>
 
// Forward declarations
struct ImGuiContext;
struct ImGuiWindow;
 
namespace MR
{
 
class ShortcutManager;
class MeshModifier;
struct UiRenderManager;
class SceneObjectsListDrawer;
 
enum class SelectedTypesMask
{
    ObjectBit = 1 << 0,
    ObjectPointsHolderBit = 1 << 1,
    ObjectLinesHolderBit = 1 << 2,
    ObjectMeshHolderBit = 1 << 3,
    ObjectLabelBit = 1 << 4,
    ObjectMeshBit = 1 << 5,
    ObjectFeatureBit = 1 << 6,
    ObjectMeasurementBit = 1 << 7,
};
MR_MAKE_FLAG_OPERATORS( SelectedTypesMask )
 
class MRVIEWER_CLASS ImGuiMenu : public MR::ViewerPlugin,
    public MultiListener<
    MouseDownListener, MouseMoveListener, MouseUpListener, MouseScrollListener, CursorEntranceListener,
    CharPressedListener, KeyDownListener, KeyUpListener, KeyRepeatListener,
    SpaceMouseMoveListener, SpaceMouseDownListener,
    TouchpadRotateGestureBeginListener, TouchpadRotateGestureUpdateListener, TouchpadRotateGestureEndListener,
    TouchpadSwipeGestureBeginListener, TouchpadSwipeGestureUpdateListener, TouchpadSwipeGestureEndListener,
    TouchpadZoomGestureBeginListener, TouchpadZoomGestureUpdateListener, TouchpadZoomGestureEndListener,
    PostResizeListener, PostRescaleListener>
{
    using ImGuiMenuMultiListener = MultiListener<
        MouseDownListener, MouseMoveListener, MouseUpListener, MouseScrollListener,
        CharPressedListener, KeyDownListener, KeyUpListener, KeyRepeatListener,
        SpaceMouseMoveListener, SpaceMouseDownListener,
        TouchpadRotateGestureBeginListener, TouchpadRotateGestureUpdateListener, TouchpadRotateGestureEndListener,
        TouchpadSwipeGestureBeginListener, TouchpadSwipeGestureUpdateListener, TouchpadSwipeGestureEndListener,
        TouchpadZoomGestureBeginListener, TouchpadZoomGestureUpdateListener, TouchpadZoomGestureEndListener,
        PostResizeListener, PostRescaleListener>;
protected:
  // Hidpi scaling to be used for text rendering.
  float hidpi_scaling_;
 
  // Ratio between the framebuffer size and the window size.
  // May be different from the hipdi scaling!
  float pixel_ratio_;
 
  // ImGui Context
  ImGuiContext * context_ = nullptr;
  // last focused plugin window
  ImGuiWindow* prevFrameFocusPlugin_ = nullptr;
 
  // if true, then pre_draw will start from polling glfw events
  bool pollEventsInPreDraw = false; // be careful here with true, this can cause infinite recurse
 
  bool showShortcuts_{ false };
  bool showStatistics_{ false };
  long long frameTimeMillisecThreshold_{ 25 };
  bool showRenameModal_{ false };
  std::string renameBuffer_;
  std::string popUpRenameBuffer_;
  bool needModalBgChange_{ false };
  bool showInfoModal_{ false };
  std::string storedModalMessage_;
  NotificationType modalMessageType_{ NotificationType::Error };
  std::shared_ptr<ShortcutManager> shortcutManager_;
 
  ImVec2 sceneWindowPos_;
  ImVec2 sceneWindowSize_;
  ImVec2 mainWindowPos_;
  ImVec2 mainWindowSize_;
 
  MRVIEWER_API virtual void setupShortcuts_();
 
  bool savedDialogPositionEnabled_{ false };
 
  std::weak_ptr<Object> lastRenameObj_;
  Box3f selectionBbox_; // updated in drawSelectionInformation_
  Box3f selectionWorldBox_;
 
  struct LabelParams
  {
      std::string lastLabel;
      std::string labelBuffer;
      std::shared_ptr<ObjectLabel> obj{ nullptr };
  } oldLabelParams_;
 
  bool allowRemoval_{ true };
  bool uniformScale_{ true };
  bool xfHistUpdated_{ false };
  bool invertedRotation_{ false };
 
  std::optional<std::pair<std::string, Vector4f>> storedColor_;
  Vector4f getStoredColor_( const std::string& str, const Color& defaultColor ) const;
 
  mutable struct PluginsCache
  {
      // if cache is valid do nothing, otherwise accumulate all custom plugins in tab sections and sort them by special string
      void validate( const std::vector<ViewerPlugin*>& viewerPlugins );
      // finds enabled custom plugin, nullptr if none is
      StateBasePlugin* findEnabled() const;
      const std::vector<StateBasePlugin*>& getTabPlugins( StatePluginTabs tab ) const;
  private:
      std::array<std::vector<StateBasePlugin*>, size_t( StatePluginTabs::Count )> sortedCustomPlufins_;
      std::vector<ViewerPlugin*> allPlugins_; // to validate
  } pluginsCache_;
 
  std::string searchPluginsString_;
 
  std::vector<std::shared_ptr<MR::MeshModifier>> modifiers_;
 
  enum ViewportConfigurations
  {
      Single,
      Horizontal, // left viewport, right viewport
      Vertical, // lower viewport, upper viewport
      Quad // left lower vp, left upper vp, right lower vp, right upper vp
  } viewportConfig_{ Single };
 
  // flag to correctly update scroll on transform window appearing
  bool selectionChangedToSingleObj_{ false };
  // menu will change objects' colors in this viewport
  ViewportId selectedViewport_ = {};
 
  // When editing feature properties, this is the target object.
  std::weak_ptr<Object> editedFeatureObject_;
  // When editing feature properties, this is the original xf of the target object, for history purposes.
  AffineXf3f editedFeatureObjectOldXf_;
 
public:
  MRVIEWER_API static const std::shared_ptr<ImGuiMenu>& instance();
 
  MRVIEWER_API virtual void init(MR::Viewer *_viewer) override;
 
  // inits glfw and glsl backend
  MRVIEWER_API virtual void initBackend();
 
  // call this to validate imgui context in the begining of the frame
  MRVIEWER_API virtual void startFrame();
  // call this to draw valid imgui context at the end of the frame
  MRVIEWER_API virtual void finishFrame();
 
  MRVIEWER_API virtual void load_font(int font_size = 13);
  MRVIEWER_API virtual void reload_font(int font_size = 13);
 
  MRVIEWER_API virtual void shutdown() override;
 
  // Draw menu
  MRVIEWER_API virtual void draw_menu();
 
  MRVIEWER_API void draw_helpers();
 
  // Can be overwritten by `callback_draw_viewer_window`
  MRVIEWER_API virtual void draw_viewer_window();
 
  MRVIEWER_API void draw_mr_menu();
 
  // Can be overwritten by `callback_draw_viewer_menu`
  //virtual void draw_viewer_menu();
 
  // Can be overwritten by `callback_draw_custom_window`
  virtual void draw_custom_window() {}
 
  // Easy-to-customize callbacks
  std::function<void(void)> callback_draw_viewer_window;
  std::function<void(void)> callback_draw_viewer_menu;
  std::function<void(void)> callback_draw_custom_window;
 
  void draw_labels_window();
 
  void draw_labels( const VisualObject& obj );
 
  MRVIEWER_API void draw_text(
      const Viewport& viewport,
      const Vector3f& pos,
      const Vector3f& normal,
      const std::string& text,
      const Color& color,
      bool clipByViewport );
 
  MRVIEWER_API float pixel_ratio();
 
  MRVIEWER_API float hidpi_scaling();
 
  MRVIEWER_API float menu_scaling() const;
 
  MRVIEWER_API ImGuiContext* getCurrentContext() const;
 
  ImGuiWindow* getLastFocusedPlugin() const { return prevFrameFocusPlugin_; };
 
  // opens Error / Warning / Info modal window with message text
  MRVIEWER_API virtual void showModalMessage( const std::string& msg, NotificationType msgType );
 
  MRVIEWER_API virtual std::filesystem::path getMenuFontPath() const;
 
  // setup maximum good time for frame rendering (if rendering is slower it will become red in statistics window)
  MRVIEWER_API void setDrawTimeMillisecThreshold( long long maxGoodTimeMillisec );
 
  // Draw scene list window with content
  MRVIEWER_API void draw_scene_list();
  // Draw scene list content only
  MRVIEWER_API void draw_scene_list_content( const std::vector<std::shared_ptr<Object>>& selected, const std::vector<std::shared_ptr<Object>>& all );
 
  // override this to have custom "Selection Properties" window
  // draw window with content
  MRVIEWER_API virtual void draw_selection_properties( const std::vector<std::shared_ptr<Object>>& selected );
  // override this to have custom "Selection Properties" content
  // draw content only
  MRVIEWER_API virtual void draw_selection_properties_content( const std::vector<std::shared_ptr<Object>>& selected );
  // override this to have custom UI in "Selection Properties" window (under "Draw Options")
 
  // override this to customize appearance of collapsing headers
  MRVIEWER_API virtual bool drawCollapsingHeader_( const char* label, ImGuiTreeNodeFlags flags = 0);
  // override this to customize appearance of collapsing headers for transform block
  MRVIEWER_API virtual bool drawCollapsingHeaderTransform_();
 
  bool make_visualize_checkbox( std::vector<std::shared_ptr<VisualObject>> selectedVisualObjs, const char* label, AnyVisualizeMaskEnum type, MR::ViewportMask viewportid, bool invert = false );
  template<typename ObjectT>
  void make_color_selector( std::vector<std::shared_ptr<ObjectT>> selectedVisualObjs, const char* label,
                            std::function<Vector4f( const ObjectT* )> getter,
                            std::function<void( ObjectT*, const Vector4f& )> setter );
  template<typename ObjType>
  void make_width( std::vector<std::shared_ptr<VisualObject>> selectedVisualObjs, const char* label,
                   std::function<float( const ObjType* )> getter,
                   std::function<void( ObjType*, const float& )> setter );
 
  void make_light_strength( std::vector<std::shared_ptr<VisualObject>> selectedVisualObjs, const char* label,
    std::function<float( const VisualObject* )> getter,
    std::function<void( VisualObject*, const float& )> setter);
 
  template <typename T, typename ObjectType>
  void make_slider( std::vector<std::shared_ptr<ObjectType>> selectedVisualObjs, const char* label,
    std::function<T( const ObjectType* )> getter,
    std::function<void( ObjectType*, T )> setter, T min, T max );
 
  void make_points_discretization( std::vector<std::shared_ptr<VisualObject>> selectedVisualObjs, const char* label,
  std::function<int( const ObjectPointsHolder* )> getter,
  std::function<void( ObjectPointsHolder*, const int& )> setter );
 
  MRVIEWER_API void draw_custom_plugins();
 
  std::shared_ptr<ShortcutManager> getShortcutManager() { return shortcutManager_; };
 
  MRVIEWER_API void add_modifier( std::shared_ptr<MR::MeshModifier> modifier );
 
  MRVIEWER_API void allowSceneReorder( bool allow );
  bool checkPossibilityObjectRemoval() { return allowRemoval_; };
 
  MRVIEWER_API void allowObjectsRemoval( bool allow );
 
  MRVIEWER_API void tryRenameSelectedObject();
 
  MRVIEWER_API void setObjectTreeState( const Object* obj, bool open );
 
  //set show shortcuts state (enable / disable)
  MRVIEWER_API void setShowShortcuts( bool val );
  //return show shortcuts state (enable / disable)
  MRVIEWER_API bool getShowShortcuts() const;
 
  // enables using of saved positions of plugin windows in the config file
  void enableSavedDialogPositions( bool on ) { savedDialogPositionEnabled_ = on; }
  // returns true if enabled using of saved positions of plugin windows in the config file, false otherwise
  bool isSavedDialogPositionsEnabled() const { return savedDialogPositionEnabled_; }
 
  // This class helps the viewer to `renderUi()` from `IRenderObject`s.
  MRVIEWER_API virtual UiRenderManager& getUiRenderManager();
 
  MRVIEWER_API const std::shared_ptr<SceneObjectsListDrawer>& getSceneObjectsList() { return sceneObjectsList_; };
 
  enum class NameTagSelectionMode
  {
      // Click without modifiers, selects one object and unselects all others.
      selectOne,
      // Ctrl+Click, toggles the selection of one object.
      toggle,
  };
  using NameTagClickSignal = boost::signals2::signal<bool( Object& object, NameTagSelectionMode mode ), StopOnTrueCombiner>;
  // This is triggered whenever a name tag of an object is clicked.
  NameTagClickSignal nameTagClickSignal;
  // Behaves as if the user clicked the object name tag, by invoking `nameTagClickSignal`.
  MRVIEWER_API bool simulateNameTagClick( Object& object, NameTagSelectionMode mode );
 
  using DrawSceneUiSignal = boost::signals2::signal<void( float menuScaling, ViewportId viewportId, UiRenderParams::UiTaskList& tasks )>;
  // This is called every frame for every viewport. Use this to draw UI bits on top of the scene.
  DrawSceneUiSignal drawSceneUiSignal;
 
  // Scene pick should be disabled because an ImGui window is in the way.
  MRVIEWER_API bool anyImGuiWindowIsHovered() const;
  // Scene pick should be disabled because a `renderUi()` UI of some object is in the way.
  MRVIEWER_API bool anyUiObjectIsHovered() const;
 
    // ======== selected objects options drawing
    // getting the mask of the list of selected objects
    MRVIEWER_API SelectedTypesMask calcSelectedTypesMask( const std::vector<std::shared_ptr<Object>>& selectedObjs );
    MRVIEWER_API bool drawGeneralOptions( const std::vector<std::shared_ptr<Object>>& selectedObjs );
    MRVIEWER_API bool drawAdvancedOptions( const std::vector<std::shared_ptr<VisualObject>>& selectedObjs, SelectedTypesMask selectedMask );
    MRVIEWER_API bool drawRemoveButton( const std::vector<std::shared_ptr<Object>>& selectedObjs );
    MRVIEWER_API bool drawDrawOptionsCheckboxes( const std::vector<std::shared_ptr<VisualObject>>& selectedObjs, SelectedTypesMask selectedMask );
    MRVIEWER_API bool drawDrawOptionsColors( const std::vector<std::shared_ptr<VisualObject>>& selectedObjs );
protected:
    MRVIEWER_API virtual void drawModalMessage_();
 
    bool capturedMouse_{ false };
    // Mouse IO
    MRVIEWER_API virtual bool onMouseDown_( MouseButton button, int modifier ) override;
    MRVIEWER_API virtual bool onMouseUp_( MouseButton button, int modifier ) override;
    MRVIEWER_API virtual bool onMouseMove_( int mouse_x, int mouse_y ) override;
    MRVIEWER_API virtual bool onMouseScroll_( float delta_y ) override;
    MRVIEWER_API virtual void cursorEntrance_( bool entered ) override;
    // Keyboard IO
    MRVIEWER_API virtual bool onCharPressed_( unsigned key, int modifiers ) override;
    MRVIEWER_API virtual bool onKeyDown_( int key, int modifiers ) override;
    MRVIEWER_API virtual bool onKeyUp_( int key, int modifiers ) override;
    MRVIEWER_API virtual bool onKeyRepeat_( int key, int modifiers ) override;
    // Scene events
    MRVIEWER_API virtual void postResize_( int width, int height ) override;
    MRVIEWER_API virtual void postRescale_( float x, float y) override;
    // Spacemouse events
    MRVIEWER_API virtual bool spaceMouseMove_( const Vector3f& translate, const Vector3f& rotate ) override;
    MRVIEWER_API virtual bool spaceMouseDown_( int key ) override;
    // Touchpad gesture events
    MRVIEWER_API virtual bool touchpadRotateGestureBegin_() override;
    MRVIEWER_API virtual bool touchpadRotateGestureUpdate_( float angle ) override;
    MRVIEWER_API virtual bool touchpadRotateGestureEnd_() override;
    MRVIEWER_API virtual bool touchpadSwipeGestureBegin_() override;
    MRVIEWER_API virtual bool touchpadSwipeGestureUpdate_( float deltaX, float deltaY, bool kinetic ) override;
    MRVIEWER_API virtual bool touchpadSwipeGestureEnd_() override;
    MRVIEWER_API virtual bool touchpadZoomGestureBegin_() override;
    MRVIEWER_API virtual bool touchpadZoomGestureUpdate_( float scale, bool kinetic ) override;
    MRVIEWER_API virtual bool touchpadZoomGestureEnd_() override;
 
    // This function reset ImGui style to current theme and scale it by menu_scaling
    // called in ImGuiMenu::postRescale_()
    MRVIEWER_API virtual void rescaleStyle_();
 
    MRVIEWER_API virtual void addMenuFontRanges_( ImFontGlyphRangesBuilder& builder ) const;
 
    MRVIEWER_API float drawSelectionInformation_();
    MRVIEWER_API void drawFeaturePropertiesEditor_( const std::shared_ptr<Object>& object );
 
 
    MRVIEWER_API virtual void draw_custom_selection_properties( const std::vector<std::shared_ptr<Object>>& selected );
 
    MRVIEWER_API float drawTransform_();
 
    MRVIEWER_API virtual bool drawTransformContextMenu_( const std::shared_ptr<Object>& /*selected*/ ) { return false; }
 
    void draw_history_block_();
 
    void draw_open_recent_button_();
 
    // A virtual function for drawing of the dialog with shortcuts. It can be overriden in the inherited classes
    MRVIEWER_API virtual void drawShortcutsWindow_();
    // returns width of items in Scene Info window
    MRVIEWER_API float getSceneInfoItemWidth_( int itemCount  = 1 );
 
    class UiRenderManagerImpl : public UiRenderManager
    {
    public:
        MRVIEWER_API void preRenderViewport( ViewportId viewport ) override;
        MRVIEWER_API void postRenderViewport( ViewportId viewport ) override;
        MRVIEWER_API BasicUiRenderTask::BackwardPassParams beginBackwardPass( ViewportId viewport, UiRenderParams::UiTaskList& tasks ) override;
        MRVIEWER_API void finishBackwardPass( const BasicUiRenderTask::BackwardPassParams& params ) override;
 
        // Which things are blocked by our `renderUi()` calls.
        BasicUiRenderTask::InteractionMask consumedInteractions{};
 
        // If this returns false, the event should be allowed to pass through to other plugins, even if ImGui wants to consume it.
        // Pass at most one bit at a time.
        MRVIEWER_API bool canConsumeEvent( BasicUiRenderTask::InteractionMask event ) const;
    };
    // This class helps the viewer to `renderUi()` from `IRenderObject`s.
    std::unique_ptr<UiRenderManagerImpl> uiRenderManager_;
    std::shared_ptr<SceneObjectsListDrawer> sceneObjectsList_;
};
 
 
// call if you want ImGui to take event if this key is pressed (to prevent scene reaction on key press)
MRVIEWER_API void reserveKeyEvent( ImGuiKey key );
 
 
} // end namespace