UI - Started working on actions

+ Can be registered
+ Can be used to draw menu items and toolbar buttons

Makefile

@@ -26,6 +26,7 @@ COMMON = \
 	 filewatcher.cc \
 	 window.cc \
 	 dialogs.cc \
+	 ui-actions.cc \
 	 globals.cc \
 	 profiling.cc \
 	 shaders.cc \

main.cc

@@ -50,6 +50,45 @@ T_Main::T_Main( )
 {
 	Globals::Init( );
 	prevSize = ImVec2( -1 , -1 );
+
+	// FIXME: should be somewhere else
+	T_UIAction saveCurves{ "Save curves" , []() {
+		if ( Globals::Sync( ).curvesFileChanged( ) ) {
+			Globals::Window( ).msgbox(
+				"Curves file changed" ,
+				"The file containing the curves has been modified "
+				"on the disk. These changes will be overwritten. "
+				"Do you want to continue?" ,
+				[]( auto b ) {
+					if ( b == T_MessageBox::BT_YES ) {
+						Globals::Sync( ).saveCurves( );
+					}
+				} , { T_MessageBox::BT_YES , T_MessageBox::BT_NO } );
+		} else {
+			Globals::Sync( ).saveCurves( );
+		}
+	} };
+	saveCurves.setEnabledCheck( []() { return Globals::Sync( ).curvesModified( ); } )
+		.setIcon( ICON_FA_FLOPPY_O )
+		.setShortcut( T_KeyboardShortcut{ 's' , E_KeyboardModifier::CTRL } );
+	Globals::Window( ).addAction( std::move( saveCurves ) );
+
+	T_UIAction reloadCurves{ "Reload curves" , []() {
+		Globals::Window( ).msgbox(
+			"Reload curves?" ,
+			"Changes you made to the curves will be lost. Do you "
+			"want to continue?" ,
+			[]( auto b ) {
+				if ( b == T_MessageBox::BT_YES ) {
+					Globals::Sync( ).loadCurves( );
+				}
+			} , { T_MessageBox::BT_YES , T_MessageBox::BT_NO } );
+	} };
+	reloadCurves.setEnabledCheck( []() { return Globals::Sync( ).curvesModified( ); } )
+		.setIcon( ICON_FA_DOWNLOAD )
+		.setShortcut( T_KeyboardShortcut{ 'r' ,
+				{ E_KeyboardModifier::CTRL , E_KeyboardModifier::SHIFT } } );
+	Globals::Window( ).addAction( std::move( reloadCurves ) );
 }
 
 void T_Main::mainLoop( )
@@ -208,33 +247,8 @@ void T_Main::makeUI( )
 	bool eSequencer{ sequencer };
 	if ( BeginMainMenuBar( ) ) {
 		if ( BeginMenu( "File" ) ) {
-			if ( MenuItem( "Save curves" , "C-s" , false , sync.curvesModified( ) ) ) {
-				if ( sync.curvesFileChanged( ) ) {
-					Globals::Window( ).msgbox(
-							"Curves file changed" ,
-							"The file containing the curves has been modified "
-							"on the disk. These changes will be overwritten. "
-							"Do you want to continue?" ,
-							[]( auto b ) {
-								if ( b == T_MessageBox::BT_YES ) {
-									Globals::Sync( ).saveCurves( );
-								}
-							} , { T_MessageBox::BT_YES , T_MessageBox::BT_NO } );
-				} else {
-					sync.saveCurves( );
-				}
-			}
-			if ( MenuItem( "Reload curves" , "C-R" , false , sync.curvesModified( ) ) ) {
-				Globals::Window( ).msgbox(
-						"Reload curves?" ,
-						"Changes you made to the curves will be lost. Do you "
-						"want to continue?" ,
-						[]( auto b ) {
-							if ( b == T_MessageBox::BT_YES ) {
-								Globals::Sync( ).loadCurves( );
-							}
-						} , { T_MessageBox::BT_YES , T_MessageBox::BT_NO } );
-			}
+			Globals::Window( ).actionMenu( "Save curves" );
+			Globals::Window( ).actionMenu( "Reload curves" );
 			Separator( );
 			if ( MenuItem( "Undo" , "C-z" , false , undo.canUndo( ) ) ) {
 				undo.undo( );

ui-actions.cc

@@ -0,0 +1,89 @@
+#include "externals.hh"
+#include "ui-actions.hh"
+
+#include <imgui_internal.h>
+
+
+/*= T_KeyboardShortcut =======================================================*/
+
+void T_KeyboardShortcut::toString(
+		char* const buffer ,
+		const size_t size ) const noexcept
+{
+	const char ch[ 2 ] = {
+		char( ( modifiers & E_KeyboardModifier::SHIFT )
+			? toupper( character ) : tolower( character ) ) ,
+		0
+	};
+	snprintf( buffer , size , "%s%s%s" ,
+			( modifiers & E_KeyboardModifier::CTRL ) ? "C-" : "" ,
+			( modifiers & E_KeyboardModifier::ALT ) ? "A-" : "" ,
+			[&]( ) {
+				switch ( character ) {
+					case ' ': return "<space>";
+					case '\n': return "<enter>";
+					default: return ch;
+				}
+			}( ) );
+}
+
+
+/*= T_UIAction ===============================================================*/
+
+void T_UIAction::menuItem( ) const noexcept
+{
+	const bool e{ enabled ? enabled( ) : true };
+
+	T_String const& title{ text ? text : id };
+	const uint32_t ts{ title.size( ) };
+	char name[ ts + 1 ];
+	memcpy( name , title.data( ) , ts );
+	name[ ts ] = 0;
+
+	char kbs[ 20 ];
+	char const* kbsp = shortcut ? kbs : nullptr;
+	if ( shortcut ) {
+		shortcut->toString( kbs , 20 );
+	}
+
+	if ( ImGui::MenuItem( name , kbsp , false , e ) ) {
+		handler( );
+	}
+}
+
+void T_UIAction::tbButton( ) const noexcept
+{
+	using namespace ImGui;
+	static T_StringBuilder sb;
+
+	sb.clear( ) << ( icon ? icon : "" ) << "##" << id << '\0';
+
+	const bool e{ enabled ? enabled( ) : true };
+	if ( !e ) {
+		PushItemFlag( ImGuiItemFlags_Disabled , true );
+		PushStyleVar( ImGuiStyleVar_Alpha ,
+				GetStyle( ).Alpha * .5f );
+	}
+	const bool rv{ Button( sb.data( ) , ImVec2{ 20 , 0 } ) };
+	if ( e && IsItemHovered( ) ) {
+		sb.clear( ) << ( text ? text : id );
+		if ( shortcut ) {
+			char kbs[ 20 ];
+			shortcut->toString( kbs , 20 );
+			sb << ' ' << kbs;
+		}
+		sb << '\0';
+
+		BeginTooltip( );
+		Text( "%s" , sb.data( ) );
+		EndTooltip( );
+	}
+	if ( !e ) {
+		PopItemFlag( );
+		PopStyleVar( );
+	}
+
+	if ( rv ) {
+		handler( );
+	}
+}

ui-actions.hh

@@ -0,0 +1,57 @@
+#pragma once
+#include "ui-input.hh"
+
+
+/*= COMMON ACTION DEFINITIONS ================================================*/
+
+struct T_KeyboardShortcut
+{
+	char character;
+	T_KeyboardModifiers modifiers;
+
+	explicit constexpr T_KeyboardShortcut(
+			char character ,
+			T_KeyboardModifiers modifiers = { } ) noexcept
+		: character{ character } , modifiers{ modifiers }
+	{}
+
+	// Writes the keyboard shortcut to a buffer
+	void toString( char* buffer , size_t size ) const noexcept;
+};
+
+struct T_UIAction
+{
+	// Function to call when the action is executed
+	using F_ActionHandler = std::function< void( void ) >;
+	// Function that checks whether the action is enabled
+	using F_ActionChecker = std::function< bool( void ) >;
+
+	T_String id;
+	T_String text;		// Text, if different from the identifier
+	char const* icon{ nullptr };
+	T_Optional< T_KeyboardShortcut > shortcut;
+	F_ActionHandler handler;
+	F_ActionChecker enabled;
+
+	T_UIAction( char const* id ,
+			F_ActionHandler handler ) noexcept
+		: id( T_String::Pooled( id ) ) ,
+			handler( std::move( handler ) )
+	{ assert( this->handler ); }
+	T_UIAction( T_String const& id ,
+			F_ActionHandler handler ) noexcept
+		: id( id ) , handler( std::move( handler ) )
+	{ assert( this->handler ); }
+
+	T_UIAction& setShortcut( const T_KeyboardShortcut sc ) noexcept
+		{ shortcut = sc; return *this; }
+	T_UIAction& setText( T_String const& t ) noexcept
+		{ text = t; return *this; }
+	T_UIAction& setIcon( char const* const i ) noexcept
+		{ icon = i; return *this; }
+	T_UIAction& setEnabledCheck( F_ActionChecker check ) noexcept
+		{ enabled = std::move( check ); return *this; }
+
+	void menuItem( ) const noexcept;
+	void tbButton( ) const noexcept;
+};

window.cc

@@ -80,6 +80,30 @@ T_Window::~T_Window( )
 	SDL_Quit( );
 }
 
+void T_Window::addAction(
+		T_UIAction action ) noexcept
+{
+	actions_.set( std::move( action ) );
+}
+
+void T_Window::actionMenu(
+		T_String const& id ) const noexcept
+{
+	auto const* const a{ actions_.get( id ) };
+	if ( a ) {
+		a->menuItem( );
+	}
+}
+
+void T_Window::actionButton(
+		T_String const& id ) const noexcept
+{
+	auto const* const a{ actions_.get( id ) };
+	if ( a ) {
+		a->tbButton( );
+	}
+}
+
 void T_Window::startFrame(
 		const bool capture ,
 		ImVec2 const& mouseInitial ) const

window.hh

@@ -1,6 +1,7 @@
 #pragma once
 #include "dialogs.hh"
 #include "mousectrl.hh"
+#include "ui-actions.hh"
 
 
 /*= WINDOW MANAGEMENT ========================================================*/
@@ -28,6 +29,12 @@ struct T_Window
 
 	//----------------------------------------------------------------------
 
+	void addAction( T_UIAction action ) noexcept;
+	void actionMenu( T_String const& id ) const noexcept;
+	void actionButton( T_String const& id ) const noexcept;
+
+	//----------------------------------------------------------------------
+
 	ImFont* defaultFont( ) const noexcept
 		{ return defaultFont_; }
 	ImFont* smallFont( ) const noexcept
@@ -48,5 +55,9 @@ struct T_Window
 	ImFont* defaultFont_;
 	ImFont* smallFont_;
 	T_AutoArray< P_ModalDialog , 8 > modals_;
+	T_ObjectTable< T_String , T_UIAction > actions_{
+		[]( T_UIAction const& a ) -> T_String {
+			return a.id;
+		} };
 };