unit Forms.Main;

interface
uses
  System.Bindings.Expression,
  System.Classes,
  System.Generics.Collections,
  System.Types,
  Vcl.ActnList,
  Vcl.ComCtrls,
  Vcl.Controls,
  Vcl.ExtCtrls,
  Vcl.Forms,
  Vcl.Graphics,
  Vcl.Imaging.jpeg,
  Vcl.Imaging.pngimage,
  Vcl.ImgList,
  Vcl.Mask,
  Vcl.Menus,
  Vcl.StdCtrls,
  Vcl.ToolWin,
  Winapi.ActiveX,

  JvExControls,
  JvExMask,
  JvGradient,
  JvGroupHeader,
  JvSpin,
  VirtualTrees,
  X2CLGraphicList,
  X2CLMenuBar,
  X2CLmusikCubeMenuBarPainter,

  Frame.MapPreview,
  Game.Base,
  Game.Intf;


type
  TMainForm = class(TForm)
    actMapAdd: TAction;
    actMapDown: TAction;
    actMapRemove: TAction;
    actMapUp: TAction;
    alMain: TActionList;
    btnClose: TButton;
    btnLaunch: TButton;
    btnSave: TButton;
    bvlButtons: TBevel;
    edtMessageOfTheDay: TEdit;
    edtServerName: TEdit;
    gbPorts: TGroupBox;
    gbServerName: TGroupBox;
    gcMenu: TX2GraphicContainer;
    gcMenuAbout: TX2GraphicContainerItem;
    gcMenuGames: TX2GraphicContainerItem;
    gcMenuMaplist: TX2GraphicContainerItem;
    gcMenuNetwork: TX2GraphicContainerItem;
    gcMenuSettings: TX2GraphicContainerItem;
    gcToolbar: TX2GraphicContainer;
    gcToolbaradd: TX2GraphicContainerItem;
    gcToolbardown: TX2GraphicContainerItem;
    gcToolbarremove: TX2GraphicContainerItem;
    gcToolbarup: TX2GraphicContainerItem;
    glMenu: TX2GraphicList;
    glToolbar: TX2GraphicList;
    grdMenu: TJvGradient;
    imgGamesWarning: TImage;
    imgLogo: TImage;
    lblChivalry: TLabel;
    lblGamesWarning: TLabel;
    lblGentleface: TLabel;
    lblJCL: TLabel;
    lblMessageOfTheDay: TLabel;
    lblPeerPort: TLabel;
    lblPixelophilia: TLabel;
    lblQueryPort: TLabel;
    lblServerName: TLabel;
    lblServerPort: TLabel;
    lblSuperObject: TLabel;
    lblVirtualTreeview: TLabel;
    llChivalry: TLinkLabel;
    llGentleface: TLinkLabel;
    llGentlefaceCC: TLinkLabel;
    llJCL: TLinkLabel;
    llPixelophilia: TLinkLabel;
    llPixelophiliaCC: TLinkLabel;
    llSuperObject: TLinkLabel;
    llVirtualTreeview: TLinkLabel;
    mbMenu: TX2MenuBar;
    mbpMenuPainter: TX2MenuBarmusikCubePainter;
    pcMain: TPageControl;
    pmnLaunch: TPopupMenu;
    pmnLaunchCopyCmdLine: TMenuItem;
    pnlButtons: TPanel;
    pnlGamesWarning: TPanel;
    pnlLogo: TPanel;
    sePeerPort: TJvSpinEdit;
    seQueryPort: TJvSpinEdit;
    seServerPort: TJvSpinEdit;
    shpLogo: TShape;
    shpMenu: TShape;
    tbGameAdd: TToolButton;
    tbGameRemove: TToolButton;
    tbGames: TToolBar;
    tbMapAdd: TToolButton;
    tbMapDown: TToolButton;
    tbMapRemove: TToolButton;
    tbMapSep1: TToolButton;
    tbMapUp: TToolButton;
    tbMapList: TToolBar;
    tsAbout: TTabSheet;
    tsConfiguration: TTabSheet;
    tsGames: TTabSheet;
    tsMapList: TTabSheet;
    tsNetwork: TTabSheet;
    vstGames: TVirtualStringTree;
    vstMapList: TVirtualStringTree;
    actLaunch: TAction;
    actCopyCmdLine: TAction;
    actSave: TAction;
    actClose: TAction;
    alMapList: TActionList;
    alGames: TActionList;
    actGameAdd: TAction;
    actGameRemove: TAction;
    pnlMapListSidebar: TPanel;
    frmMapPreview: TMapPreviewFrame;
    tbGamesSep1: TToolButton;
    tbGameActive: TToolButton;
    actGameActive: TAction;
    gcToolbaractive: TX2GraphicContainerItem;
    btnMapListSave: TButton;
    btnMapListLoad: TButton;
    actMapListLoad: TAction;
    actMapListSave: TAction;
    btnRevert: TButton;
    actRevert: TAction;
    llWebsite: TLinkLabel;
    lblProductName: TLabel;
    lblCopyright: TLabel;
    gbPassword: TGroupBox;
    lblGamePassword: TLabel;
    edtGamePassword: TEdit;
    lblAdminPassword: TLabel;
    edtAdminPassword: TEdit;
    cbShowPasswords: TCheckBox;
    pmnLaunchSep1: TMenuItem;
    actOpenConfigFolder: TAction;
    pmnLaunchOpenConfigFolder: TMenuItem;

    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
    procedure mbMenuCollapsing(Sender: TObject; Group: TX2MenuBarGroup; var Allowed: Boolean);
    procedure mbMenuSelectedChanged(Sender: TObject; Item: TX2CustomMenuBarItem);
    procedure llLinkClick(Sender: TObject; const Link: string; LinkType: TSysLinkType);
    procedure SpinEditChange(Sender: TObject);
    procedure EditChange(Sender: TObject);
    procedure actCloseExecute(Sender: TObject);
    procedure actSaveExecute(Sender: TObject);
    procedure actRevertExecute(Sender: TObject);
    procedure actLaunchExecute(Sender: TObject);
    procedure actCopyCmdLineExecute(Sender: TObject);
    procedure actGameAddExecute(Sender: TObject);
    procedure actGameRemoveExecute(Sender: TObject);
    procedure actGameActiveExecute(Sender: TObject);
    procedure vstGamesGetText(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType; var CellText: string);
    procedure vstGamesPaintText(Sender: TBaseVirtualTree; const TargetCanvas: TCanvas; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType);
    procedure vstGamesFocusChanged(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex);
    procedure vstGamesDblClick(Sender: TObject);
    procedure vstMapListGetText(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType; var CellText: string);
    procedure vstMapListChange(Sender: TBaseVirtualTree; Node: PVirtualNode);
    procedure vstMapListDragOver(Sender: TBaseVirtualTree; Source: TObject; Shift: TShiftState; State: TDragState; Pt: TPoint; Mode: TDropMode; var Effect: Integer; var Accept: Boolean);
    procedure vstMapListDragDrop(Sender: TBaseVirtualTree; Source: TObject; DataObject: IDataObject; Formats: TFormatArray; Shift: TShiftState; Pt: TPoint; var Effect: Integer; Mode: TDropMode);
    procedure vstMapListFocusChanged(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex);
    procedure actMapAddExecute(Sender: TObject);
    procedure actMapRemoveExecute(Sender: TObject);
    procedure actMapUpExecute(Sender: TObject);
    procedure actMapDownExecute(Sender: TObject);
    procedure cbShowPasswordsClick(Sender: TObject);
    procedure actOpenConfigFolderExecute(Sender: TObject);
  private type
    TBindingExpressionList = TList<TBindingExpression>;
    TPageMenuDictionary = TDictionary<TTabSheet, TX2MenuBarItem>;
  private
    FActiveGame: TCustomGame;
    FPageMenuMap: TPageMenuDictionary;
    FUIBindings: TBindingExpressionList;

    function GetModified: Boolean;
    procedure SetActiveGame(const Value: TCustomGame);
    procedure SetModified(const Value: Boolean);
  protected
    procedure EnablePageActions;
    procedure ActiveGameChanged;
    procedure SaveActiveGame;
    procedure RevertActiveGame;

    procedure ClearUIBindings;
    procedure Bind(const APropertyName: string; ADestObject: TObject; const ADestPropertyName: string);
    procedure BindGameNetwork;
    procedure BindGameName;
    procedure BindGamePassword;

    procedure UpdateMenu;
    procedure UpdateGameList;
    procedure UpdateMapList;

    procedure SaveGameList;

    function FindMapNode(AMap: TGameMap): PVirtualNode;

    procedure HandleMapSelection(ANodes: TNodeArray; ATargetIndex: Integer; ACopy: Boolean);
    procedure MoveMapSelection(ANodes: TNodeArray; ATargetIndex: Integer);
    procedure CopyMapSelection(ANodes: TNodeArray; ATargetIndex: Integer);

    property ActiveGame: TCustomGame read FActiveGame write SetActiveGame;
    property PageMenuMap: TPageMenuDictionary read FPageMenuMap;
    property UIBindings: TBindingExpressionList read FUIBindings;
  public
    property Modified: Boolean read GetModified write SetModified;
  end;


implementation
uses
  System.Bindings.Helper,
  System.DateUtils,
  System.Math,
  System.StrUtils,
  System.SysUtils,
  Vcl.Clipbrd,
  Vcl.GraphUtil,
  Vcl.Themes,
  Winapi.ShellAPI,
  Winapi.Windows,

  X2UtApp,
  X2UtGraphics,

  Forms.Game,
  Forms.Map,
  Game.Chivalry.MedievalWarfare,
  Game.List,
  Persist.GameList,
  Resources;


type
  TINIHintWindow = class(THintWindow)
  protected
    function IsINIHint(const AHint: string): Boolean;
    function GetINIHint(const AHint: string; out ASection, AKey: string): Boolean;

    procedure Paint; override;
  public
    function CalcHintRect(MaxWidth: Integer; const AHint: string; AData: Pointer): TRect; override;
  end;


const
  INIHintPrefix = 'INI:';
  INIHintSeparator = '>';


  GameColumnName = 0;
  GameColumnLocation = 1;

  MapColumnName = 0;
  MapColumnCategory = 1;


{$R *.dfm}


{ TMainForm }
procedure TMainForm.FormCreate(Sender: TObject);

  function GetVersionDate: TDateTime;
  begin
    Result := EncodeDate(2000, 1, 1) + Pred(App.Version.Release);
  end;


var
  lightBtnFace: TColor;
  pageIndex: Integer;
  menuGroup: TX2MenuBarGroup;
  menuItem: TX2MenuBarItem;
  userGamesFileName: string;

begin
  FUIBindings := TBindingExpressionList.Create;
  FPageMenuMap := TPageMenuDictionary.Create(pcMain.PageCount);


  vstGames.NodeDataSize := SizeOf(TCustomGame);
  vstMapList.NodeDataSize := SizeOf(TCustomGame);


  { Configure pages }
  for pageIndex := 0 to Pred(pcMain.PageCount) do
    pcMain.Pages[pageIndex].TabVisible := False;

  pageIndex := 0;

  for menuGroup in mbMenu.Groups do
    for menuItem in menuGroup.Items do
    begin
      Assert(pageIndex < pcMain.PageCount);

      FPageMenuMap.Add(pcMain.Pages[pageIndex], menuItem);
      menuItem.Tag := pageIndex;
      Inc(pageIndex);
    end;


  { Eye-candy }
  lightBtnFace := BlendColors(clBtnFace, clWindow, 196);
  pnlGamesWarning.Color := lightBtnFace;

  lblProductName.Caption := Format('%s v%d.%d - %s',
                                   [App.Version.Strings.ProductName,
                                    App.Version.Major,
                                    App.Version.Minor,
                                    FormatDateTime('yyyy.mm.dd', GetVersionDate)]);

  lblCopyright.Caption := App.Version.Strings.LegalCopyright;


  { Load games }
  userGamesFileName := Resources.GetUserDataPath(Resources.UserGamesFileName);
  if FileExists(userGamesFileName) then
    TGameListPersist.Load(userGamesFileName, TGameList.Instance)
  else
    TGameList.Instance.AutoDetect;

  UpdateGameList;

  // #ToDo1 -oMvR: 30-6-2014: load last active game
  if TGameList.Instance.Count > 0 then
    ActiveGame := TGameList.Instance.First;

  { Initialize menu }
  mbpMenuPainter.GroupColors.Hot.Assign(mbpMenuPainter.GroupColors.Normal);

  mbMenu.SelectFirst;
end;


procedure TMainForm.FormDestroy(Sender: TObject);
begin
  ClearUIBindings;

  FreeAndNil(FPageMenuMap);
  FreeAndNil(FUIBindings);
end;


procedure TMainForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
  if Modified then
    CanClose := (MessageBox(Self.Handle, 'Your changes will not be saved. Do you want to exit?', 'Close', MB_YESNO or MB_ICONQUESTION) = ID_YES);
end;


procedure TMainForm.EnablePageActions;
const
  ActionListState: array[Boolean] of TActionListState = (asSuspended, asNormal);

begin
  { Prevent shortcuts from triggering on invisible pages }
  alMapList.State := ActionListState[pcMain.ActivePage = tsMapList];
  alGames.State := ActionListState[pcMain.ActivePage = tsGames];
end;


procedure TMainForm.ActiveGameChanged;
begin
  ClearUIBindings;
  vstMapList.Clear;

  if Assigned(ActiveGame) and (not ActiveGame.Loaded) then
    ActiveGame.Load;

  { Bind Modified property }
  UIBindings.Add(TBindings.CreateManagedBinding(
      [TBindings.CreateAssociationScope([Associate(ActiveGame, 'src')])],
      'src.Modified',
      [TBindings.CreateAssociationScope([Associate(Self, 'dst')])],
      'dst.Modified',
      nil, nil, [coNotifyOutput, coEvaluate]));


  if Supports(ActiveGame, IGameNetwork) then
    BindGameNetwork;

  if Supports(ActiveGame, IGameName) then
    BindGameName;

  if Supports(ActiveGame, IGamePassword) then
    BindGamePassword;

  if Supports(ActiveGame, IGameMapList) then
    UpdateMapList;

  UpdateMenu;
end;


procedure TMainForm.SaveActiveGame;
begin
  if Assigned(ActiveGame) then
    ActiveGame.Save;
end;


procedure TMainForm.RevertActiveGame;
begin
  if Assigned(ActiveGame) then
  begin
    ActiveGame.Load;

    // #ToDo2 -oMvR: 2-7-2014: This should be based on the observer pattern used by TBindings,
    //                         but I haven't figured out how that works yet. For now, manually refresh.
    UpdateMapList;
  end;
end;


procedure TMainForm.ClearUIBindings;
var
  binding: TBindingExpression;

begin
  for binding in UIBindings do
    TBindings.RemoveBinding(binding);

  UIBindings.Clear;
end;


procedure TMainForm.Bind(const APropertyName: string; ADestObject: TObject; const ADestPropertyName: string);
begin
  { Source -> Destination }
  UIBindings.Add(TBindings.CreateManagedBinding(
      [TBindings.CreateAssociationScope([Associate(ActiveGame, 'src')])],
      'src.' + APropertyName,

      [TBindings.CreateAssociationScope([Associate(ADestObject, 'dst')])],
      'dst.' + ADestPropertyName,

      nil, nil, [coNotifyOutput, coEvaluate]));

  { Destination -> Source }
  UIBindings.Add(TBindings.CreateManagedBinding(
      [TBindings.CreateAssociationScope([Associate(ADestObject, 'src')])],
      'src.' + ADestPropertyName,

      [TBindings.CreateAssociationScope([Associate(ActiveGame, 'dst')])],
      'dst.' + APropertyName,

      nil, nil, [coNotifyOutput]));
end;


procedure TMainForm.BindGameNetwork;
begin
  Bind('ServerPort', seServerPort, 'Value');
  Bind('PeerPort', sePeerPort, 'Value');
  Bind('QueryPort', seQueryPort, 'Value');
end;


procedure TMainForm.BindGameName;
begin
  Bind('ServerName', edtServerName, 'Text');
  Bind('MessageOfTheDay', edtMessageOfTheDay, 'Text');
end;


procedure TMainForm.BindGamePassword;
begin
  Bind('GamePassword', edtGamePassword, 'Text');
  Bind('AdminPassword', edtAdminPassword, 'Text');
end;


procedure TMainForm.cbShowPasswordsClick(Sender: TObject);
const
  PasswordChar: array[Boolean] of Char = ('*', #0);

begin
  edtGamePassword.PasswordChar := PasswordChar[cbShowPasswords.Checked];
  edtAdminPassword.PasswordChar := PasswordChar[cbShowPasswords.Checked];
end;

procedure TMainForm.UpdateMenu;

  procedure EnablePageByInterface(APage: TTabSheet; AInterface: TGUID);
  begin
    PageMenuMap[APage].Enabled := Supports(ActiveGame, AInterface);
  end;

begin
  EnablePageByInterface(tsNetwork, IGameNetwork);
  EnablePageByInterface(tsConfiguration, IGameName);
  EnablePageByInterface(tsMapList, IGameMapList);

  gbPassword.Visible := Supports(ActiveGame, IGamePassword);

  if Assigned(mbMenu.SelectedItem) and (not mbMenu.SelectedItem.Enabled) then
    mbMenu.SelectFirst;
end;


procedure TMainForm.UpdateGameList;
begin
  vstGames.RootNodeCount := TGameList.Instance.Count;
  pnlGamesWarning.Visible := (TGameList.Instance.Count = 0);
end;


procedure TMainForm.UpdateMapList;
var
  gameMapList: IGameMapList;

begin
  vstMapList.BeginUpdate;
  try
    if Supports(ActiveGame, IGameMapList, gameMapList) then
      vstMapList.RootNodeCount := gameMapList.MapCount
    else
      vstMapList.Clear;
  finally
    vstMapList.EndUpdate;
  end;
end;


procedure TMainForm.SaveGameList;
begin
  TGameListPersist.Save(Resources.GetUserDataPath(Resources.UserGamesFileName), TGameList.Instance);
  UpdateGameList;
end;


function TMainForm.FindMapNode(AMap: TGameMap): PVirtualNode;
var
  gameMapList: IGameMapList;

begin
  Result := nil;
  if not Supports(ActiveGame, IGameMapList, gameMapList) then
    exit;

  Result := vstMapList.IterateSubtree(nil,
    procedure(Sender: TBaseVirtualTree; Node: PVirtualNode; Data: Pointer; var Abort: Boolean)
    begin
      Abort := (gameMapList.Map[Node^.Index] = AMap);
    end,
    nil);
end;


procedure TMainForm.HandleMapSelection(ANodes: TNodeArray; ATargetIndex: Integer; ACopy: Boolean);
var
  gameMapList: IGameMapList;
  node: PVirtualNode;
  targetIndex: Integer;
  sourceShift: Integer;
  sourceIndex: Integer;
  newIndex: Integer;
  selectedMaps: TList<TGameMap>;
  map: TGameMap;

begin
  if (ATargetIndex < 0) or (Cardinal(ATargetIndex) > vstMapList.RootNodeCount) then
    exit;

  if not Supports(ActiveGame, IGameMapList, gameMapList) then
    exit;

  targetIndex := ATargetIndex;
  sourceShift := 0;

  vstMapList.BeginUpdate;
  try
    selectedMaps := TList<TGameMap>.Create;
    try
      for node in ANodes do
      begin
        sourceIndex := node^.Index;

        if ACopy then
        begin
          { Copy map nodes }
          Inc(sourceIndex, sourceShift);

          map := TGameMap.Create(gameMapList.Map[sourceIndex]);
          gameMapList.InsertMap(targetIndex, map);
          selectedMaps.Add(map);

          Inc(targetIndex);

          if sourceIndex > ATargetIndex then
            Inc(sourceShift);
        end else
        begin
          { Move map nodes }
          if sourceIndex < ATargetIndex then
            Inc(sourceIndex, sourceShift);

          if targetIndex > sourceIndex then
          begin
            newIndex := Pred(targetIndex);
            Dec(sourceShift);
          end else
          begin
            newIndex := targetIndex;
            Inc(targetIndex);
          end;

          selectedMaps.Add(gameMapList.Map[sourceIndex]);
          gameMapList.MoveMap(sourceIndex, newIndex);
        end;
      end;


      vstMapList.ClearSelection;
      vstMapList.IterateSubtree(nil,
        procedure(Sender: TBaseVirtualTree; Node: PVirtualNode; Data: Pointer; var Abort: Boolean)
        begin
          if selectedMaps.Contains(gameMapList.Map[Node^.Index]) then
            Sender.Selected[Node] := True;
        end,
        nil);
    finally
      FreeAndNil(selectedMaps);
    end;
  finally
    vstMapList.EndUpdate;
  end;
end;


procedure TMainForm.MoveMapSelection(ANodes: TNodeArray; ATargetIndex: Integer);
begin
  HandleMapSelection(ANodes, ATargetIndex, False);
end;


procedure TMainForm.CopyMapSelection(ANodes: TNodeArray; ATargetIndex: Integer);
begin
  HandleMapSelection(ANodes, ATargetIndex, True);
end;


function TMainForm.GetModified: Boolean;
begin
  Result := actSave.Enabled;
end;


procedure TMainForm.SetActiveGame(const Value: TCustomGame);
begin
  if Value <> FActiveGame then
  begin
    FActiveGame := Value;
    ActiveGameChanged;
  end;
end;


procedure TMainForm.SetModified(const Value: Boolean);
begin
  actSave.Enabled := Value;
  actRevert.Enabled := Value;
end;


procedure TMainForm.mbMenuCollapsing(Sender: TObject; Group: TX2MenuBarGroup; var Allowed: Boolean);
begin
  Allowed := False;
end;


procedure TMainForm.mbMenuSelectedChanged(Sender: TObject; Item: TX2CustomMenuBarItem);
begin
  pcMain.ActivePageIndex := Item.Tag;
  EnablePageActions;
end;


procedure TMainForm.llLinkClick(Sender: TObject; const Link: string; LinkType: TSysLinkType);
begin
  ShellExecute(0, 'open', PChar(Link), nil, nil, SW_SHOWNORMAL);
end;


procedure TMainForm.SpinEditChange(Sender: TObject);
begin
  TBindings.Notify(Sender, 'Value');
end;


procedure TMainForm.EditChange(Sender: TObject);
begin
  TBindings.Notify(Sender, 'Text');
end;


procedure TMainForm.actCloseExecute(Sender: TObject);
begin
  Close;
end;


procedure TMainForm.actSaveExecute(Sender: TObject);
begin
  SaveActiveGame;
end;


procedure TMainForm.actRevertExecute(Sender: TObject);
begin
  if MessageBox(Self.Handle, 'Do you want to revert your changes?', 'Revert', MB_YESNO or MB_ICONQUESTION) = ID_NO then
    exit;

  RevertActiveGame;
end;


procedure TMainForm.actGameAddExecute(Sender: TObject);
var
  game: TCustomGame;

begin
  if TGameForm.Insert(Self, game) then
  begin
    TGameList.Instance.Add(game);
    SaveGameList;

    ActiveGame := game;
  end;
end;


procedure TMainForm.actGameRemoveExecute(Sender: TObject);
var
  gameIndex: Integer;
  game: TCustomGame;

begin
  if not Assigned(vstGames.FocusedNode) then
    exit;

  gameIndex := vstGames.FocusedNode^.Index;

  if MessageBox(Self.Handle, 'Do you want to remove the selected game?', 'Remove', MB_YESNO or MB_ICONQUESTION) = ID_YES then
  begin
    vstGames.BeginUpdate;
    try
      game := TGameList.Instance[gameIndex];
      TGameList.Instance.Delete(gameIndex);

      if game = ActiveGame then
      begin
        if TGameList.Instance.Count > 0 then
          ActiveGame := TGameList.Instance.First
        else
          ActiveGame := nil;
      end;

      SaveGameList;
    finally
      vstGames.EndUpdate;
    end;
  end;
end;


procedure TMainForm.actGameActiveExecute(Sender: TObject);
begin
  if Assigned(vstGames.FocusedNode) then
  begin
    { For the sake of clarity, always save or revert changes when switching }
    if Modified then
    begin
      case MessageBox(Self.Handle, 'Do you want to save your changes before switching the active game?', 'Set active game',
                      MB_YESNOCANCEL or MB_ICONQUESTION) of
        ID_YES:
          SaveActiveGame;

        ID_NO:
          RevertActiveGame;

        ID_CANCEL:
          exit;
      end;
    end;

    vstGames.BeginUpdate;
    try
      ActiveGame := TGameList.Instance[vstGames.FocusedNode^.Index];
      vstGames.InvalidateNode(vstGames.FocusedNode);
    finally
      vstGames.EndUpdate;
    end;
  end;
end;


procedure TMainForm.vstGamesGetText(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType; var CellText: string);
var
  game: TCustomGame;

begin
  game := TGameList.Instance[Node^.Index];

  case Column of
    GameColumnName:
      CellText := game.GameName;

    GameColumnLocation:
      CellText := game.Location;
  end;
end;


procedure TMainForm.vstGamesFocusChanged(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex);
begin
  actGameRemove.Enabled := Assigned(Sender.FocusedNode);
  actGameActive.Enabled := Assigned(Sender.FocusedNode) and (ActiveGame <> TGameList.Instance[Sender.FocusedNode^.Index]);
end;


procedure TMainForm.vstGamesDblClick(Sender: TObject);
begin
  actGameActive.Execute;
end;


procedure TMainForm.vstMapListGetText(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType; var CellText: string);
var
  gameMapList: IGameMapList;
  map: TGameMap;

begin
  if not Supports(ActiveGame, IGameMapList, gameMapList) then
    exit;

  map := gameMapList.Map[Node^.Index];

  case Column of
    MapColumnName:
      CellText := map.DisplayName;

    MapColumnCategory:
      CellText := map.Category;
  end;
end;


procedure TMainForm.vstGamesPaintText(Sender: TBaseVirtualTree; const TargetCanvas: TCanvas; Node: PVirtualNode; Column: TColumnIndex; TextType: TVSTTextType);
begin
  if (Column = GameColumnName) and (TGameList.Instance[Node^.Index] = ActiveGame) then
    TargetCanvas.Font.Style := [fsBold];
end;


procedure TMainForm.vstMapListChange(Sender: TBaseVirtualTree; Node: PVirtualNode);
var
  hasSelection: Boolean;

begin
  hasSelection := (Sender.SelectedCount > 0);

  actMapRemove.Enabled := hasSelection;
  actMapUp.Enabled := hasSelection;
  actMapDown.Enabled := hasSelection;
end;


procedure TMainForm.vstMapListDragOver(Sender: TBaseVirtualTree; Source: TObject; Shift: TShiftState; State: TDragState; Pt: TPoint;
                                       Mode: TDropMode; var Effect: Integer; var Accept: Boolean);
begin
  Accept := (Source = Sender);
end;


procedure TMainForm.vstMapListDragDrop(Sender: TBaseVirtualTree; Source: TObject; DataObject: IDataObject; Formats: TFormatArray;
                                       Shift: TShiftState; Pt: TPoint; var Effect: Integer; Mode: TDropMode);
var
  sourceTree: TBaseVirtualTree;
  selectedNodes: TNodeArray;
  targetIndex: Integer;
  lastNode: PVirtualNode;

begin
  sourceTree := (Source as TBaseVirtualTree);
  targetIndex := 0;

  case Mode of
    dmNowhere:
      begin
        lastNode := Sender.GetLast;
        if Assigned(lastNode) then
          targetIndex := Succ(lastNode^.Index);
      end;

    dmAbove,
    dmOnNode:
      targetIndex := Sender.DropTargetNode^.Index;

    dmBelow:
      targetIndex := Succ(Sender.DropTargetNode^.Index);
  end;

  selectedNodes := sourceTree.GetSortedSelection(True);

  if Effect = DROPEFFECT_COPY then
    CopyMapSelection(selectedNodes, targetIndex)
  else
    MoveMapSelection(selectedNodes, targetIndex);
end;


procedure TMainForm.vstMapListFocusChanged(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex);
var
  gameMapList: IGameMapList;

begin
  if not Supports(ActiveGame, IGameMapList, gameMapList) then
    exit;

  if Assigned(Node) then
    frmMapPreview.Load(gameMapList.Map[Node^.Index].PreviewName)
  else
    frmMapPreview.Clear;
end;


procedure TMainForm.actLaunchExecute(Sender: TObject);
begin
  if not Assigned(ActiveGame) then
    exit;

  if ShellExecute(0, 'open', PChar(ActiveGame.GetExecutable), PChar(ActiveGame.GetParameters),
                  PChar(ActiveGame.Location), SW_SHOWNORMAL) <= 32 then
    RaiseLastOSError;
end;


procedure TMainForm.actCopyCmdLineExecute(Sender: TObject);
begin
  if not Assigned(ActiveGame) then
    exit;

  Clipboard.AsText := ActiveGame.GetCommandLine;
  MessageBox(Self.Handle, 'Command line has been copied to the clipboard', 'Copy', MB_OK or MB_ICONINFORMATION);
end;


procedure TMainForm.actOpenConfigFolderExecute(Sender: TObject);
begin
  if not Assigned(ActiveGame) then
    exit;

  ShellExecute(Self.Handle, 'explore', PChar(ActiveGame.GetConfigPath), nil, nil, SW_SHOWNORMAL);
end;


procedure TMainForm.actMapAddExecute(Sender: TObject);
var
  gameMapList: IGameMapList;
  maps: TList<TGameMap>;
  map: TGameMap;
  node: PVirtualNode;

begin
  if not Supports(ActiveGame, IGameMapList, gameMapList) then
    exit;

  maps := TList<TGameMap>.Create;
  try
    if TMapForm.Insert(Self, gameMapList, maps) then
    begin
      for map in maps do
        gameMapList.AddMap(map);

      UpdateMapList;
      vstMapList.ClearSelection;

      for map in maps do
      begin
        node := FindMapNode(map);
        if Assigned(node) then
        begin
          vstMapList.FocusedNode := node;
          vstMapList.Selected[node] := True;
        end;
      end;
    end;
  finally
    FreeAndNil(maps);
  end;
end;


procedure TMainForm.actMapRemoveExecute(Sender: TObject);
var
  gameMapList: IGameMapList;
  selectedNodes: TNodeArray;
  nodeIndex: Integer;

begin
  if not Supports(ActiveGame, IGameMapList, gameMapList) then
    exit;

  if vstMapList.SelectedCount = 0 then
    exit;

  if MessageBox(Self.Handle, 'Do you want to remove the selected map(s)?', 'Remove', MB_YESNO or MB_ICONQUESTION) = ID_YES then
  begin
    vstMapList.BeginUpdate;
    try
      selectedNodes := vstMapList.GetSortedSelection(True);

      for nodeIndex := High(selectedNodes) downto Low(selectedNodes) do
        gameMapList.DeleteMap(selectedNodes[nodeIndex]^.Index);

      UpdateMapList;
    finally
      vstMapList.ClearSelection;
      vstMapList.EndUpdate;
    end;
  end;
end;


procedure TMainForm.actMapUpExecute(Sender: TObject);
var
  selectedNodes: TNodeArray;
  targetIndex: Integer;

begin
  selectedNodes := vstMapList.GetSortedSelection(True);
  if Length(selectedNodes) = 0 then
    exit;

  targetIndex := Pred(selectedNodes[0]^.Index);
  if targetIndex < 0 then
    targetIndex := 0;

  MoveMapSelection(selectedNodes, targetIndex);
end;


procedure TMainForm.actMapDownExecute(Sender: TObject);
var
  selectedNodes: TNodeArray;
  targetIndex: Integer;

begin
  selectedNodes := vstMapList.GetSortedSelection(True);
  if Length(selectedNodes) = 0 then
    exit;

  targetIndex := Succ(selectedNodes[High(selectedNodes)]^.Index) + 1;
  MoveMapSelection(selectedNodes, targetIndex);
end;


{ TINIHintWindow }
function TINIHintWindow.CalcHintRect(MaxWidth: Integer; const AHint: string; AData: Pointer): TRect;
var
  section: string;
  key: string;
  sectionRect: TRect;

begin
  if GetINIHint(AHint, section, key) then
  begin
    Canvas.Font.Style := [fsBold];
    try
      sectionRect := inherited CalcHintRect(MaxWidth, section, AData);
    finally
      Canvas.Font.Style := [];
    end;

    Result := inherited CalcHintRect(MaxWidth, key, AData);

    Result.Right := Max(Result.Right, sectionRect.Right);
    Inc(Result.Bottom, RectHeight(sectionRect));
  end else
    Result := inherited CalcHintRect(MaxWidth, AHint, AData);
end;


procedure TINIHintWindow.Paint;
var
  section: string;
  key: string;
  textRect: TRect;
  clipRect: TRect;
  elementColor: TColor;
  elementDetails: TThemedElementDetails;
  gradientStart: TColor;
  gradientEnd: TColor;
  textColor: TColor;

begin
  if GetINIHint(Caption, section, key) then
  begin
    textRect := ClientRect;
    textColor := Screen.HintFont.Color;

    if StyleServices.Enabled then
    begin
      clipRect := textRect;
      InflateRect(textRect, 4, 4);
      if TOSVersion.Check(6) and StyleServices.IsSystemStyle then
      begin
        // Paint Windows gradient background
        StyleServices.DrawElement(Canvas.Handle, StyleServices.GetElementDetails(tttStandardNormal), textRect, clipRect);
      end else
      begin
        elementDetails := StyleServices.GetElementDetails(thHintNormal);
        if StyleServices.GetElementColor(elementDetails, ecGradientColor1, elementColor) and (elementColor <> clNone) then
          gradientStart := elementColor
        else
          gradientStart := clInfoBk;
        if StyleServices.GetElementColor(elementDetails, ecGradientColor2, elementColor) and (elementColor <> clNone) then
          gradientEnd := elementColor
        else
          gradientEnd := clInfoBk;
        if StyleServices.GetElementColor(elementDetails, ecTextColor, elementColor) and (elementColor <> clNone) then
          textColor := elementColor
        else
          textColor := Screen.HintFont.Color;
        GradientFillCanvas(Canvas, gradientStart, gradientEnd, textRect, gdVertical);
      end;

      textRect := clipRect;
    end;

    Inc(textRect.Left, 2);
    Inc(textRect.Top, 2);

    Canvas.Font.Color := textColor;
    Canvas.Font.Style := [fsBold];
    try
      DrawText(Canvas.Handle, section, -1, textRect, DT_LEFT or DT_NOPREFIX or DT_WORDBREAK or DrawTextBiDiModeFlagsReadingOnly);
      Inc(textRect.Top, Canvas.TextHeight(section) + 2);
    finally
      Canvas.Font.Style := [];
    end;

    DrawText(Canvas.Handle, key, -1, textRect, DT_LEFT or DT_NOPREFIX or DT_WORDBREAK or DrawTextBiDiModeFlagsReadingOnly);
  end else
    inherited Paint;
end;


function TINIHintWindow.IsINIHint(const AHint: string): Boolean;
begin
  Result := AnsiStartsText(INIHintPrefix, AHint);
end;


function TINIHintWindow.GetINIHint(const AHint: string; out ASection, AKey: string): Boolean;
var
  hint: string;
  separatorPos: Integer;

begin
  Result := IsINIHint(AHint);
  if Result then
  begin
    hint := Copy(AHint, Succ(Length(INIHintPrefix)), MaxInt);
    ASection := '';
    AKey := hint;

    separatorPos := Pos(INIHintSeparator, hint);
    if separatorPos > 0 then
    begin
      ASection := hint;
      SetLength(ASection, Pred(separatorPos));
      Delete(AKey, 1, Pred(separatorPos) + Length(INIHintSeparator));
    end;
  end;
end;


initialization
  HintWindowClass := TINIHintWindow;

end.