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flightgear/src/GUI/Highlight.hxx
Julian Smith 1bafe15c4c Added highlighting system.
If /sim/highlighting/enabled is true, we highlight animated objects under the
pointer, and also highlight other objects that are animated by the same or
related properties.

The intent here is to be able to give a visual indication of what cockpit
controls do or what cockpit controls affect particular aircraft objects - for
example moving the pointer over the flaps will highlight the flaps and also
highlight any controls or rotary indicators in the cockpit that are associated
with the flaps.

To make this work, we have to discover associations between properties. This
is currently done for YASim (e.g. associations between /controls/flight/flaps
and /surface-positions/flap-pos-norm) and autopilot filters (e.g. with
the 777, digital filters associate /controls/flight/rudder-nul with
/fcs/fbw/yaw/rudder-ratio-out). We don't currently gather associations between
properties in JSBSim

We also detect associations between dialogs, menus and keypresses and
properties, which is used to populate /sim/highlighting/current with
information about dialogs, menus and keypresses that are associated with the
currently highlighted nodes' properties.

Details:

src/GUI/Highlight.cxx
src/GUI/Highlight.hxx
src/GUI/CMakeLists.txt
src/Main/fg_init.cxx
    New subsystem called 'highlight', with support for registering and
    recovering links between menus, dialogs, keypresses and OSG node
    animations.

    Provides a function Highlight::highlight_nodes() which highlights
    related nodes using internal NodeHighlighting class, and populates
    /sim/highlighting/current with information about related dialogs, menus and
    keypresses.

    The NodeHighlighting class works by making nodes use an alternative
    StateSet which shows up as a distinct material on screen. We remember each
    highlighted node's original StateSet so that we can un-highlight. We update
    the material parameters using a listener for /sim/highlighting/material,
    which allows some control over the appearence of highlighted nodes.

src/FDM/flight.cxx
src/FDM/flight.hxx
    Added virtual method FGInterface::property_associations() which returns
    property associations from the FDM. Default implementation returns empty
    set. Implemented in YASim, but not (yet) in JSBSim. Uses a simple function
    pointer at the moment to avoid requring FDMs to use recent C++ features.

src/FDM/YASim/FGFDM.cpp
src/FDM/YASim/FGFDM.hpp
src/FDM/YASim/YASim.cxx
src/FDM/YASim/YASim.hxx
    Gathers information about property associations on startup such as
    /controls/flight/flaps => /surface-positions/flap-pos-norm, then
    YASim::property_associations() overrides default implementation to return
    these associations.

src/Autopilot/analogcomponent.cxx
src/Autopilot/analogcomponent.hxx
src/Autopilot/digitalfilter.cxx
src/Autopilot/inputvalue.cxx
src/Autopilot/inputvalue.hxx
    Filters now gather information about their input/output properties and
    register with Highlight::add_property_property(). For example this makes
    highlighting work on the 777, where pilot controls affect control surfaces
    only via filters.

src/GUI/new_gui.cxx
    Scan menus, keypresses and dialogs and register associations with
    Highlight::add_*().

src/GUI/property_list.cxx
src/GUI/property_list.hxx
src/GUI/FGPUIDialog.cxx
    Added <readonly> flag to property-list. If set, we don't show .. or . items
    and don't respond to mouse/keyboard.

    Used by fgdata's new Highlighting dialogue.

src/Model/acmodel.cxx
src/Model/acmodel.hxx
    Visit the user aircraft's scene graph when it is loaded, gathering
    information about osg::Node's that are animated by properties, and register
    these associations with Highlight::add_property_node().

src/Viewer/renderer.cxx
    When scanning for pick highlights, use Highlight::highlight_nodes() to
    highlight animated objects under the pointer and related objects.
2021-10-08 06:13:04 +01:00

114 lines
4.3 KiB
C++

#pragma once
#include <simgear/structure/subsystem_mgr.hxx>
#include <osg/Node>
#include <string>
#include <set>
/* Represents a menu item. */
struct HighlightMenu
{
HighlightMenu(int menu, int item) : menu(menu), item(item)
{}
int menu; /* Number of menu in the menubar, e.g. 0 is 'File'. */
int item; /* Number of item in the menu. */
std::string description() const; /* E.g. "0/6: File/Joystick Configuration". */
};
/* Information about OSG nodes, dialogs etc that are associated with a
particular property. */
struct HighlightInfo
{
/* OSG Nodes that are animated by the property. */
std::set<osg::ref_ptr<osg::Node>> nodes;
/* Dialogues that modify the property.*/
std::set<std::string> dialogs;
/* Keypresses that modify the property. */
std::set<std::string> keypresses;
/* Menu items that modify the property. */
std::set<HighlightMenu> menus;
};
struct Highlight : SGSubsystem
{
Highlight();
~Highlight();
void bind() override;
void init() override;
void reinit() override;
void shutdown() override;
void unbind() override;
void update(double dt) override;
static const char* staticSubsystemClassId() { return "reflect"; }
/* If specified node is animated, highlights it and other nodes
that are animated by the same or related properties. Also updates
/sim/highlighting/current to contain information about associated dialogs,
menus, and keypresses.
Returns the number of properties found. Returns -1 if highlighting is not
currently enabled. */
int highlight_nodes(osg::Node* node);
/* Returns information about nodes and UI elements that are associated with a
specific property. */
const HighlightInfo& find_property_info(const std::string& property);
/* Below are individual functions that return properties that are associated
with a particular node or UI element. */
/* Returns list of properties that are used to animate the specified OSG node.
*/
const std::set<std::string>& find_node_properties(osg::Node* node);
/* Returns list of properties affected by specified dialog. */
const std::set<std::string>& find_dialog_properties(const std::string& dialog);
/* Returns list of properties affected by specified keypress. */
const std::set<std::string>& find_keypress_properties(const std::string& keypress);
/* Returns list of properties affected by specified menu. */
const std::set<std::string>& find_menu_properties(const HighlightMenu& menu);
/* Returns list of properties that are influenced by the specified property,
/e.g. if <property> is controls/flight/rudder, the returned set could contain
/surface-positions/rudder-pos-norm. */
const std::set<std::string>& find_property_to_properties(const std::string& property);
/* Returns list of properties that influence the specified property, e.g.
if <property> is /surface-positions/rudder-pos-norm, the returned set could
contain /controls/flight/rudder. */
const std::set<std::string>& find_property_from_properties(const std::string& property);
/* Returns list of menus that open the specified dialog. */
const std::set<HighlightMenu>& find_menu_from_dialog(const std::string& dialog);
/* Below are functions that are used to set up associations. */
/* Should be called if <node> is animated using <property>. */
void add_property_node(const std::string& property, osg::ref_ptr<osg::Node> node);
/* Should be called if <dialog> affects <property>. */
void add_property_dialog(const std::string& property, const std::string& dialog);
/* Should be called if <keypress> affects <property>. */
void add_property_keypress(const std::string& property, const std::string& keypress);
/* Should be called if <menu> affects <property>. */
void add_property_menu(HighlightMenu menu, const std::string& property);
/* Should be called if <menu> opens <dialog>. */
void add_menu_dialog(HighlightMenu menu, const std::string& dialog);
/* Should be called if two properties are associated, for example YASim
associates /controls/flight/flaps with /surface-positions/flap-pos-norm. */
void add_property_property(const std::string& property1, const std::string& property2);
};