unit indLCDDisplay_Editor;

{$mode objfpc}{$H+}

interface

uses        
  Classes, SysUtils, PropEdits, ComponentEditors, 
  indLCDDisplay;

type
  TLCDDisplayCharDefsPropertyEditor = class(TPersistentPropertyEditor)
  public
    procedure Edit; override;
    procedure ExecuteVerb(Index: Integer); override;
    function GetAttributes: TPropertyAttributes; override;
    function GetVerb(Index: Integer): string; override;
    function GetVerbCount: Integer; override;
    function LCDDisplay: TLCDDisplay;
  end;
  
  TLCDDisplayComponentEditor = class(TComponentEditor)
  private
    procedure EditLines;    
  public
    procedure Edit; override;
    procedure ExecuteVerb(Index: Integer); override;
    function GetVerb(Index: Integer): string; override;    
    function GetVerbCount: Integer; override;
    function LCDDisplay: TLCDDisplay;
  end;

procedure EditCharDefs(ALCDDisplay: TLCDDisplay);
  
implementation

uses
  Controls, StdCtrls, Dialogs, ButtonPanel, Forms,
  indLCDDisplay_EditorForm;

{ Opens the char def editor. }
procedure EditCharDefs(ALCDDisplay: TLCDDisplay);
var
  F: TLCDCharDefsEditor;
begin
  F := TLCDCharDefsEditor.Create(nil);
  try
    F.Position := poScreenCenter;
    F.LCDDisplay := TLCDDisplay(ALCDDisplay);
    F.ShowModal;  // Cancel has been handled by the editor form.
  finally
    F.Free;
  end;
end;

{ Loads the char defs of the specified LCDDisplay from an xml file. }
procedure LoadCharDefsFromFile(ALCDDisplay: TLCDDisplay);
var
  dlg: TOpenDialog;
begin
  dlg := TOpenDialog.Create(nil);
  try
    dlg.FileName := '';
    dlg.Filter := 'XML files (*.xml)|*.xml';
    if dlg.Execute then
    begin
      ALCDDisplay.CharDefs.LoadFromFile(dlg.FileName);
      ALCDDisplay.Invalidate;
    end;
  finally
    dlg.Free;
  end;
end;
  
{ Saves the chardefs of the specified LCDDisplay to an xml file. }
procedure SaveCharDefsToFile(ALCDDisplay: TLCDDisplay);
var
  dlg: TOpenDialog;
begin
  dlg := TSaveDialog.Create(nil);
  try
    dlg.FileName := '';
    dlg.Filter := 'XML files (*.xml)|*.xml';
    if dlg.Execute then
      ALCDDisplay.CharDefs.SaveToFile(dlg.FileName);
  finally
    dlg.Free;
  end;
end;


{ TLCDDisplayCharDefsPropertyEditor }

{ Opens the chardefs editor. }
procedure TLCDDisplayCharDefsPropertyEditor.Edit;
begin
  EditCharDefs(LCDDisplay);
end;

{ Executes the routines assigned to the CharDefs context menu }
procedure TLCDDisplayCharDefsPropertyEditor.ExecuteVerb(Index: Integer); 
begin
  case Index of
    0: Edit;
    1: LoadCharDefsFromFile(LCDDisplay);
    2: SaveCharDefsToFile(LCDDisplay);
  end;
end;

{ The property editor should open the CharDefs editor. }
function TLCDDisplayCharDefsPropertyEditor.GetAttributes: TPropertyAttributes;
begin
  Result := inherited GetAttributes + [paDialog];
end;

{ Determines how many items will be added to the CharDefs context menu. }
function TLCDDisplayCharDefsPropertyEditor.GetVerbCount: Integer; 
begin
  Result := 3;
end;

{ Determines the menu item text for CharDefs context menu. }
function TLCDDisplayCharDefsPropertyEditor.GetVerb(Index: Integer): string; 
begin
  case Index of
    0: Result := 'Edit...';
    1: Result := 'Load from file...';
    2: Result := 'Save to file...';
  end;
end;

function TLCDDisplayCharDefsPropertyEditor.LCDDisplay: TLCDDisplay;
begin
  Result := TLCDDisplay(GetComponent(0));
end;


{ TLCDDisplayComponentEditor }

procedure TLCDDisplayComponentEditor.Edit;
begin
  ExecuteVerb(0);
end;

procedure TLCDDisplayComponentEditor.EditLines;
var
  F: TForm;
  Memo: TMemo;
begin
  F := TForm.CreateNew(nil);
  try
    F.Caption := 'Edit LCDDisplay text';
    F.Position := poScreenCenter;
    F.Width := 300;
    F.Height := 200;
    Memo := TMemo.Create(F);
    with Memo do
    begin
      Align := alClient;
      BorderSpacing.Around := 8;
      Parent := F;
      Lines.Assign(LCDDisplay.Lines);
    end;
    with TButtonPanel.Create(F) do
    begin
      ShowButtons := [pbOK, pbCancel];
      Parent := F;
    end;
    if F.ShowModal = mrOK then
    begin
      LCDDisplay.Lines.Assign(Memo.Lines);
      LCDDisplay.Invalidate;
    end;
  finally
    F.Free;
  end;
end;

procedure TLCDDisplayComponentEditor.ExecuteVerb(Index: Integer);
begin
  case Index of
    0: EditLines;
    1: EditCharDefs(LCDDisplay);
    2: LoadCharDefsFromFile(LCDDisplay);
    3: SaveCharDefsToFile(LCDDisplay);
  end;
end;

{ Determines how many items will be added to the LCDDisplay context menu. }
function TLCDDisplayComponentEditor.GetVerbCount: Integer; 
begin
  Result := 4;
end;

{ Determines the menu item text for LCDDisplay context menu. }
function TLCDDisplayComponentEditor.GetVerb(Index: Integer): string; 
begin
  case Index of
    0: Result := 'Lines text...';
    1: Result := 'Edit character defs...';
    2: Result := 'Load character defs from file...';
    3: Result := 'Save character defs to file...';
  end;
end;

function TLCDDisplayComponentEditor.LCDDisplay: TLCDDisplay;
begin
  Result := TLCDDisplay(GetComponent);
end;

end.