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unit SynPopupMenu;
{$mode ObjFPC}{$H+}
interface
uses
Classes, SysUtils, Menus, SynEdit, SynEditStrConst;
type
TSynDefaultPopupMenu = (dpmDisabled, dpmBefore, dpmAfter);
TSynPopupMenu = class(TPopupMenu)
private
FDefaultPopupMenu: TSynDefaultPopupMenu;
procedure FillDefaultMenu;
procedure ClearDefaultMenu;
protected
procedure ItemOnClick(Sender: TObject);
public
constructor Create(AOwner: TComponent); override;
procedure PopUp(X, Y: Integer); override;
published
property DefaultPopupMenu: TSynDefaultPopupMenu read
FDefaultPopupMenu write FDefaultPopupMenu default dpmBefore;
end;
implementation
type
TMenuEntry = (meNone, meUndo, meRedo, meCut, meCopy, mePaste,
meDelete, meSelectAll);
{ TSynPopupMenu }
constructor TSynPopupMenu.Create(AOwner: TComponent);
begin
inherited;
FDefaultPopupMenu := dpmBefore;
end;
procedure TSynPopupMenu.FillDefaultMenu;
var
i: Integer;
procedure AddMenuItem(const ACaption: string; const ATag: TMenuEntry);
var
FItem: TMenuItem;
begin
FItem := TMenuItem.Create(Self);
FItem.Caption := ACaption;
FItem.OnClick := @ItemOnClick;
FItem.Tag := Integer(ATag);
if FDefaultPopupMenu = dpmAfter then
Items.Add(FItem)
else
Items.Insert(i, FItem);
Inc(i);
end;
var
FEmpty: Boolean;
begin
if FDefaultPopupMenu = dpmDisabled then
Exit;
i := 0;
FEmpty := Items.Count = 0;
if not FEmpty and (FDefaultPopupMenu = dpmAfter) then // separator
AddMenuItem('-', meNone);
AddMenuItem(SYNS_Undo, meUndo);
AddMenuItem(SYNS_Redo, meRedo);
AddMenuItem('-', meNone);
AddMenuItem(SYNS_Cut, meCut);
AddMenuItem(SYNS_Copy, meCopy);
AddMenuItem(SYNS_Paste, mePaste);
AddMenuItem('-', meNone);
AddMenuItem(SYNS_Delete, meDelete);
AddMenuItem(SYNS_SelectAll, meSelectAll);
if not FEmpty and (FDefaultPopupMenu = dpmBefore) then // separator
AddMenuItem('-', meNone);
end;
procedure TSynPopupMenu.ClearDefaultMenu;
var
i: Integer;
begin
for i := Items.Count - 1 downto 0 do
if Items[i].OnClick = @ItemOnClick then
Items.Delete(i);
end;
procedure TSynPopupMenu.ItemOnClick(Sender: TObject);
begin
with TCustomSynEdit(PopupComponent) do
case TMenuEntry(TMenuItem(Sender).Tag) of
meUndo: Undo;
meRedo: Redo;
meCut: CutToClipboard;
meCopy: CopyToClipboard;
mePaste: PasteFromClipboard;
meDelete: SelText := '';
meSelectAll: SelectAll;
end;
end;
procedure TSynPopupMenu.PopUp(X, Y: Integer);
var
i: Integer;
begin
ClearDefaultMenu;
if PopupComponent is TCustomSynEdit then
begin
FillDefaultMenu;
for i := 0 to Items.Count - 1 do
with TCustomSynEdit(PopupComponent) do
if Items[i].OnClick = @ItemOnClick then // make sure it's ours
case TMenuEntry(Items[i].Tag) of
meUndo: Items[i].Enabled := CanUndo;
meRedo: Items[i].Enabled := CanRedo;
meCut: Items[i].Enabled := SelAvail and not ReadOnly;
meCopy: Items[i].Enabled := SelAvail;
mePaste: Items[i].Enabled := CanPaste;
meDelete: Items[i].Enabled := SelAvail and not ReadOnly;
meSelectAll: Items[i].Enabled := HasText([shtIncludeVirtual]);
end;
end;
inherited;
end;
end.
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