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flightgear/src/GUI/new_gui.hxx

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// new_gui.hxx - XML-configured GUI subsystem.
#ifndef __NEW_GUI_HXX
#define __NEW_GUI_HXX 1
#include <simgear/props/props.hxx>
#include <simgear/structure/subsystem_mgr.hxx>
#include <simgear/misc/sg_path.hxx>
#include <vector>
#include <map>
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#include <memory> // for unique_ptr on some systems
#include <cstring> // for strcmp in lstr() (in this header, alas)
class FGMenuBar;
class FGDialog;
class FGColor;
class FGFontCache;
class puFont;
/**
* XML-configured GUI subsystem.
*
* This subsystem manages the graphical user interface for FlightGear.
* It creates a menubar from the XML configuration file in
* $FG_ROOT/gui/menubar.xml, then stores the configuration properties
* for XML-configured dialog boxes found in $FG_ROOT/gui/dialogs/. It
* can show or hide the menubar, and can display any dialog by name.
*/
class NewGUI : public SGSubsystem
{
public:
/**
* Constructor.
*/
NewGUI ();
/**
* Destructor.
*/
virtual ~NewGUI ();
// Subsystem API.
void bind() override;
void init() override;
void reinit() override;
void shutdown() override;
void unbind() override;
void update(double delta_time_sec) override;
// Subsystem identification.
static const char* staticSubsystemClassId() { return "gui"; }
/**
* Redraw the GUI picking up new GUI colors.
*/
virtual void redraw ();
/**
* Creates a new dialog box, using the same property format as the
* gui/dialogs configuration files. Does not display the
* resulting dialog. If a pre-existing dialog of the same name
* exists, it will be deleted. The node argument will be stored
* in the GUI subsystem using SGPropertNode_ptr reference counting.
* It should not be deleted by user code.
*
* @param node A property node containing the dialog definition
*/
virtual void newDialog (SGPropertyNode* node);
/**
* Display a dialog box.
*
* At initialization time, the subsystem reads all of the XML
* configuration files from the directory $FG_ROOT/gui/dialogs/.
* The configuration for each dialog specifies a name, and this
* method invokes the dialog with the name specified (if it
* exists).
*
* @param name The name of the dialog box.
* @return true if the dialog exists, false otherwise.
*/
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virtual bool showDialog (const std::string &name);
/**
* Toggle display of a dialog box.
*
* @param name The name of the dialog box.
* @return true if the dialog is being displayed, false otherwise.
*/
virtual bool toggleDialog (const std::string &name);
/**
* Close the currenty active dialog. This function is intended to
* be called from code (pui callbacks, for instance) that registers
* its dialog object as active via setActiveDialog(). Other
* user-level code should use the closeDialog(name) API.
*
* @return true if a dialog was active, false otherwise
*/
virtual bool closeActiveDialog ();
/**
* Close a named dialog, if it is open.
*
* @param name The name of the dialog box.
* @return true if the dialog was active, false otherwise.
*/
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virtual bool closeDialog (const std::string &name);
/**
* Get dialog property tree's root node.
* @param name The name of the dialog box.
* @return node pointer if the dialog was found, zero otherwise.
*/
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virtual SGPropertyNode_ptr getDialogProperties (const std::string &name);
/**
* Return a pointer to the current menubar.
*/
virtual FGMenuBar * getMenuBar ();
/**
* Ignore this method.
*
* This method is for internal use only, but it has to be public
* so that a non-class callback can see it.
*/
virtual void setActiveDialog (FGDialog * dialog);
/**
* Get the dialog currently active, if any.
*
* @return The active dialog, or 0 if none is active.
*/
virtual FGDialog * getActiveDialog ();
/**
* Get the named dialog if active.
*
* @return The named dialog, or 0 if it isn't active.
*/
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virtual FGDialog * getDialog (const std::string &name);
virtual FGColor *getColor (const char * name) const {
_citt_t it = _colors.find(name);
return (it != _colors.end()) ? it->second : NULL;
}
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virtual FGColor *getColor (const std::string &name) const {
_citt_t it = _colors.find(name.c_str());
return (it != _colors.end()) ? it->second : NULL;
}
virtual puFont *getDefaultFont() { return _font; }
protected:
/**
* Test if the menubar is visible.
*
* This method exists only for binding.
*/
virtual bool getMenuBarVisible () const;
/**
* Show or hide the menubar.
*
* This method exists only for binding.
*/
virtual void setMenuBarVisible (bool visible);
virtual void setStyle ();
virtual void setupFont (SGPropertyNode *);
/**
* Used by reinit() and redraw() to close all dialogs and to apply
* current GUI colors. If "reload" is false, reopens all dialogs.
* Otherwise reloads all XML dialog files from disk and reopens all
* but Nasal * generated dialogs, omitting dynamic widgets. (This
* is only useful for GUI development.)
*/
virtual void reset (bool reload);
bool getMenuBarOverlapHide() const;
void setMenuBarOverlapHide(bool hide);
private:
void createMenuBarImplementation();
struct ltstr
{
bool operator()(const char* s1, const char* s2) const {
return strcmp(s1, s2) < 0;
}
};
puFont *_font;
typedef std::map<const char*,FGColor*, ltstr> ColourDict;
ColourDict _colors;
typedef ColourDict::iterator _itt_t;
typedef ColourDict::const_iterator _citt_t;
void clear_colors();
// Read all the configuration files in a directory.
void readDir (const SGPath& path);
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std::unique_ptr<FGMenuBar> _menubar;
FGDialog * _active_dialog;
typedef std::map<std::string,FGDialog *> DialogDict;
DialogDict _active_dialogs;
typedef std::map<std::string, SGPath> NamePathDict;
// mapping from dialog names to the corresponding XML property list
// which defines them
NamePathDict _dialog_names;
// cache of loaded dialog proeprties
typedef std::map<std::string,SGPropertyNode_ptr> NameDialogDict;
NameDialogDict _dialog_props;
};
#endif // __NEW_GUI_HXX