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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Application;
interface
uses
Boolean,
Character,
Event,
Exception,
Integer._32.Positive,
Object_.Base,
Text,
UserInterface.Control,
UserInterface.Control.Navigation,
UserInterface.Control.Panel.Paged,
UserInterface.DragAndDrop.Manager,
UserInterface.Keyboard.Event,
UserInterface.Keyboard.HotKey.Manager,
UserInterface.Keyboard.Modifiers,
UserInterface.Mouse.Event,
UserInterface.Object_.Action.Factory,
Value,
Value.Path,
Windows.Api.Messages,
Windows.ClipBoard,
Windows.Control.Window,
Windows.Event.Queue,
Windows.MouseManager;
type
TTargetedEvent = class(TObject)
public
Target: TControl;
Event: TEvent;
destructor Destroy(); override;
end;
TApplication = class(TBaseObject)
protected
FExplorerTarget: TPagedPanel;
FControlFactory: TControlFactory;
ObjectActionFactory: TObjectActionFactory;
ClipBoard: TWindowsClipBoard;
MouseManager: TWindowsMouseManager;
FocusManager: TKeyboardFocusManager;
HotKeyManager: THotKeyManager;
NavigationManager: TControlNavigationManager;
DragAndDropManager: TDragAndDropManager;
ThreadIdentifier: TPositiveInteger32;
EventQueue: TWindowsEventQueue;
SurrogatePairStart: TCharacterCodePoint;
function ConvertMessageToMouseButtonEvent(const Message: TMSG): TMouseButtonEvent;
function ConvertMessageToMouseMoveEvent(const Message: TMSG): TMouseMoveEvent;
function ConvertMessageToMouseWheelEvent(TopLevelControl: TControl; const Message: TMSG): TMouseWheelEvent;
function ConvertMessageToMouseLeaveEvent(TopLevelControl: TControl; const Message: TMSG): TMouseLeaveEvent;
function ConvertMessageToMouseEvent(TopLevelControl: TControl; const Message: TMSG): TMouseEvent;
function ConvertMouseMessage(const Message: TMSG): TTargetedEvent;
function GetCurrentModifierKeys(): TKeyModifiers;
function HandleSurrogatePair(Character: TCharacterCodePoint): TCharacterCodePoint;
function ConvertMessageToKeyboardEvent(const Message: TMSG): TKeyboardEvent;
function PreemptTargetedEvent(TargetedEvent: TTargetedEvent): TBoolean;
function HandleKeyboardEvent(TargetedEvent: TTargetedEvent): TBoolean;
function HandleTargetedEvent(TargetedEvent: TTargetedEvent): TBoolean;
function ConvertKeyboardMessage(const Message: TMSG): TTargetedEvent;
function ConvertMessage(const Message: TMSG): TTargetedEvent;
function HandleMessage(var Message: TMSG): TBoolean;
function CreateWindow(): TWindow; virtual;
function DetermineExplorerTarget(): TPagedPanel;
procedure CloseUserInterface(); virtual;
function EmbellishWithToolbar(Control: TControl; Path: TValuePath): TControl;
public
MainWindow: TWindow; // TODO: make protected again
constructor Create(); override;
procedure Run(); virtual;
procedure OpenControl(Control: TControl; TransferFocus: TBoolean; Target: TPagedPanel = nil);
function OpenControlForValue(Path: TValuePath; TransferFocus: TBoolean; Target: TPagedPanel = nil): TControl;
function Old_OpenControlForValue(Value: TValue; TransferFocus: TBoolean; Target: TPagedPanel = nil): TControl; deprecated 'Use OpenControlForValue() with an entire TValuePath';
procedure ShowError(Message: TText);
procedure ShowException(Exception: EException);
procedure ShowInformation(Message: TText);
function ShowConfirmation(Message: TText): TBoolean;
procedure HandleException(Exception: EException); virtual;
property ControlFactory: TControlFactory read FControlFactory write FControlFactory;
public
class var
Instance: TApplication;
class procedure Main(); virtual; stdcall;
end;
implementation
uses
Character.Set_.Unicode,
Collection.List,
Integer._16,
Log,
Reference.User,
Task.Scheduler,
UserInterface.Control.Query.ExplorerTarget,
UserInterface.Control.Query.Path,
UserInterface.Control.Toolbar,
UserInterface.Keyboard.FocusManager.Default,
UserInterface.Keyboard.Key,
UserInterface.Mouse,
UserInterface.Navigation,
UserInterface.Object_.Action,
UserInterface.Object_.Selection,
Windows.Api.Error,
Windows.Api.Kernel.Thread,
Windows.Api.Type_,
Windows.Api.Type_.Geometry,
Windows.Api.UserInterface,
Windows.Api.VirtualKeyCodes,
Windows.Control,
Windows.Direct2d.Window;
{ TApplication }
constructor TApplication.Create();
begin
inherited Create();
TApplication.Instance := Self;
IsMultiThread := True;
ThreadIdentifier := GetCurrentThreadId();
ClipBoard := TWindowsClipBoard.Create();
HotKeyManager := THotKeyManager.Create();
MouseManager := TWindowsMouseManager.Create();
FocusManager := TDefaultKeyboardFocusManager.Create();
EventQueue := TWindowsEventQueue.Create();
TTaskScheduler.Instance.UserInterfaceEventQueue := EventQueue;
DragAndDropManager := TDragAndDropManager.Create();
DragAndDropManager.MouseManager := MouseManager;
NavigationManager := TControlNavigationManager.Create();
NavigationManager.FocusManager := FocusManager;
NavigationManager.DragAndDropManager := DragAndDropManager;
SurrogatePairStart := TUnicode.NOT_A_CHARACTER_FFFF;
end;
function TApplication.CreateWindow(): TWindow;
begin
Result := TDirect2dWindow.Create();
end;
function TApplication.DetermineExplorerTarget(): TPagedPanel;
var
Source: TControl;
begin
Source := FocusManager.FocusedControl;
if Source = nil then
Source := MainWindow;
Result := Source.FindFirstSibling(TExplorerTargetQuery.Create()) as TPagedPanel;
end;
procedure TApplication.HandleException(Exception: EException);
begin
ShowException(Exception);
TLog.Get([ClassName]).AppendException(Exception);
end;
function TApplication.HandleKeyboardEvent(TargetedEvent: TTargetedEvent): TBoolean;
var
Event: TKeyboardEvent;
KeyDown: TKeyDownEvent;
begin
Event := TargetedEvent.Event as TKeyboardEvent;
Result := (TargetedEvent.Target <> nil) and TargetedEvent.Target.DistributeKeyboardEventUpCompositionHierarchy(Event);
if not Result and (Event is TKeyDownEvent) then
begin
KeyDown := Event as TKeyDownEvent;
if IsNavigationKey(KeyDown.Key) then
Result := NavigationManager.ImmediateNavigateControl(KeyToNavigation(KeyDown.Key, KeyDown.Modifiers));
end;
end;
function TApplication.HandleMessage(var Message: TMSG): TBoolean;
var
TargetedEvent: TTargetedEvent;
begin
TargetedEvent := ConvertMessage(Message);
Result := (TargetedEvent <> nil) and HandleTargetedEvent(TargetedEvent);
// TODO: Here we check whether we receive a '.' on the numeric keypad and translate it to a period, regardless of the keyboard layout and current locale
if (TargetedEvent <> nil) and (TargetedEvent.Event is TKeyStateEvent) and ((TargetedEvent.Event as TKeyStateEvent).Key = TKey.Decimal) then
Message.wParam := VK_OEM_PERIOD;
TargetedEvent.Free();
if not Result then
begin
TranslateMessage(Message);
DispatchMessage(Message);
end;
end;
function TApplication.HandleSurrogatePair(Character: TCharacterCodePoint): TCharacterCodePoint;
begin
if SurrogatePairStart <> TUnicode.NOT_A_CHARACTER_FFFF then
begin
if TUnicode.IsSurrogatePairEnd(Character) then
begin
Result := TUnicode.DecodeSurrogatePair(SurrogatePairStart, Character);
SurrogatePairStart := TUnicode.NOT_A_CHARACTER_FFFF;
end
else
raise EException.Create('Incomplete surrogate pair');
end
else if TUnicode.IsSurrogatePairStart(Character) then
begin
SurrogatePairStart := Character;
Result := TUnicode.NOT_A_CHARACTER_FFFF;
end
else
Result := Character;
end;
function TApplication.HandleTargetedEvent(TargetedEvent: TTargetedEvent): TBoolean;
begin
Result := PreemptTargetedEvent(TargetedEvent);
if not Result then
begin
if TargetedEvent.Event is TMouseEvent then
Result := MouseManager.SendEventToControl(TargetedEvent.Target, TargetedEvent.Event as TMouseEvent)
else if TargetedEvent.Event is TKeyboardEvent then
Result := HandleKeyboardEvent(TargetedEvent);
end;
end;
class procedure TApplication.Main();
begin
{$IF Defined(DEBUG) and not Defined(FPC)}
ReportMemoryLeaksOnShutdown := True;
{$ENDIF}
try
TApplication.Instance := Create();
TApplication.Instance.Run();
TApplication.Instance.Free();
except
on Exception: EException do
TLog.Get(['Startup']).AppendException(Exception);
end;
end;
procedure TApplication.Run();
var
Message: TMSG;
ControlToFocus: TControl;
OK: BOOL;
begin
ControlToFocus := MainWindow.DefaultControlToFocus();
if ControlToFocus <> nil then
ControlToFocus.RequestFocus();
repeat
OK := GetMessage(Message, 0, 0, 0);
if OK.Value = -1 then
EWindows32.RaiseLast()
else if OK then
begin
try
case Message.message of
WM_LBUTTONDOWN,
WM_LBUTTONUP,
WM_MBUTTONDOWN,
WM_MBUTTONUP,
WM_RBUTTONDOWN,
WM_RBUTTONUP,
WM_MOUSEWHEEL,
WM_MOUSEMOVE,
WM_MOUSELEAVE,
WM_KEYDOWN,
WM_KEYUP,
WM_CHAR,
WM_SYSKEYDOWN,
WM_SYSKEYUP,
WM_SYSCHAR:
HandleMessage(Message);
else
DispatchMessage(Message);
end;
except
on Exception: EException do
HandleException(Exception);
end;
end;
until not OK;
CloseUserInterface();
end;
function TApplication.ShowConfirmation(Message: TText): TBoolean;
begin
Result := MessageBox(MainWindow.Handle, Message, 'Confirmation', MB_YESNO) = ID_YES;
end;
procedure TApplication.ShowError(Message: TText);
begin
MessageBox(MainWindow.Handle, Message, 'Error', MB_ICONERROR or MB_OK);
end;
procedure TApplication.ShowException(Exception: EException);
var
Message: TText;
Handle: THandle;
begin
Message := Exception.Message;
if (Self <> nil) and (MainWindow <> nil) then
Handle := MainWindow.Handle
else
Handle := 0;
MessageBox(Handle, Message, 'Exception occurred', MB_ICONERROR or MB_OK);
end;
function TApplication.EmbellishWithToolbar(Control: TControl; Path: TValuePath): TControl;
var
Actions: TList<TObjectAction>;
Selection: TObjectSelection;
Toolbar: TControlToolbar;
ActionBar: TActionBar;
ControlToolbar: TControl;
begin
Selection := TObjectSelection.Create();
Selection.AddReference();
Selection.Objects.Add(Path);
ControlToolBar := Control.CreateToolbar();
Actions := ObjectActionFactory.CreateActionsForObjects(Selection);
Actions.ElementManager := TReferenceUser<TObjectAction>.Create();
if (ControlToolbar <> nil) or (Actions.Count > 0) then
begin
Toolbar := TControlToolbar.Create();
Toolbar.Path := Control.Path;
Toolbar.Caption := Control.Caption;
Toolbar.PanelControl := Control.Embellish();
if ControlToolbar <> nil then
Toolbar.Toolbar.AddControl(ControlToolbar);
if Actions.Count > 0 then
begin
ActionBar := TActionBar.Create();
ActionBar.Add(Actions);
Toolbar.Toolbar.AddControl(ActionBar);
end;
Result := Toolbar;
end
else
Result := Control;
Actions.Free();
Selection.ReleaseReference();
end;
function TApplication.GetCurrentModifierKeys(): TKeyModifiers;
begin
Result := [];
if GetKeyState(VK_SHIFT) < 0 then
Result := Result + [TKeyModifier.Shift];
if GetKeyState(VK_CONTROL) < 0 then
Result := Result + [TKeyModifier.Control];
if GetKeyState(VK_MENU) < 0 then
Result := Result + [TKeyModifier.Alt];
end;
procedure TApplication.CloseUserInterface();
begin
MainWindow.Free();
MainWindow := nil;
ControlFactory.Free();
ClipBoard.Free();
MouseManager.Free();
FocusManager.Free();
HotKeyManager.Free();
NavigationManager.Free();
DragAndDropManager.Free();
EventQueue.Free();
end;
function TApplication.ConvertKeyboardMessage(const Message: TMSG): TTargetedEvent;
var
KeyboardEvent: TKeyboardEvent;
FocusManager: TKeyboardFocusManager;
begin
KeyboardEvent := ConvertMessageToKeyboardEvent(Message);
if KeyboardEvent <> nil then
begin
if MainWindow.ContextMenuControl.IsVisible then
FocusManager := MainWindow.ContextMenuControl.GetFocusManager()
else
FocusManager := MainWindow.GetFocusManager();
Result := TTargetedEvent.Create();
Result.Target := FocusManager.FocusedControl;
Result.Event := KeyboardEvent;
end
else
Result := nil;
end;
function TApplication.ConvertMessage(const Message: TMSG): TTargetedEvent;
begin
case Message.message of
WM_LBUTTONDOWN, WM_LBUTTONUP, WM_MBUTTONDOWN, WM_MBUTTONUP, WM_RBUTTONDOWN, WM_RBUTTONUP, WM_MOUSEWHEEL, WM_MOUSEMOVE, WM_MOUSELEAVE:
Result := ConvertMouseMessage(Message);
WM_KEYDOWN, WM_KEYUP, WM_CHAR, WM_SYSKEYDOWN, WM_SYSKEYUP, WM_SYSCHAR:
Result := ConvertKeyboardMessage(Message);
else
raise EException.Create('Unknown message');
end;
end;
function TApplication.ConvertMessageToKeyboardEvent(const Message: TMSG): TKeyboardEvent;
var
Modifiers: TKeyModifiers;
Character: TCharacterCodePoint;
begin
Modifiers := GetCurrentModifierKeys();
case Message.message of
WM_KEYDOWN, WM_SYSKEYDOWN:
Result := TKeyDownEvent.Create(FocusManager.Keyboard, Modifiers, TVirtualKey.ToKey(Message.wParam));
WM_KEYUP, WM_SYSKEYUP:
Result := TKeyUpEvent.Create(FocusManager.Keyboard, Modifiers, TVirtualKey.ToKey(Message.wParam));
WM_CHAR:
begin
Character := HandleSurrogatePair(Message.wParam);
if Character <> TUnicode.NOT_A_CHARACTER_FFFF then
Result := TKeyPressEvent.Create(FocusManager.Keyboard, Modifiers, Character)
else
Result := nil;
end;
WM_SYSCHAR:
Result := TKeyPressEvent.Create(FocusManager.Keyboard, Modifiers, Message.wParam);
else
raise EException.Create('Unknown keyboard message');
end;
end;
function TApplication.ConvertMessageToMouseButtonEvent(const Message: TMSG): TMouseButtonEvent;
var
Mouse: TMouse;
ButtonState: TMouseButtonState;
begin
Mouse := MouseManager.Mouse;
case Message.message of
WM_LBUTTONDOWN, WM_MBUTTONDOWN, WM_RBUTTONDOWN:
Result := TMouseButtonDownEvent.Create(Mouse);
WM_LBUTTONUP, WM_MBUTTONUP, WM_RBUTTONUP:
Result := TMouseButtonUpEvent.Create(Mouse);
else
raise EException.Create('Unknown mouse button message');
end;
case Message.message of
WM_LBUTTONDOWN, WM_LBUTTONUP:
Result.Button := Mouse.Left;
WM_MBUTTONDOWN, WM_MBUTTONUP:
Result.Button := Mouse.Middle;
WM_RBUTTONDOWN, WM_RBUTTONUP:
Result.Button := Mouse.Right;
else
raise EException.Create('Unknown mouse button message');
end;
case Message.message of
WM_LBUTTONDOWN, WM_MBUTTONDOWN, WM_RBUTTONDOWN:
ButtonState := Result.Button.Down;
WM_LBUTTONUP, WM_MBUTTONUP, WM_RBUTTONUP:
ButtonState := Result.Button.Up;
else
raise EException.Create('Unknown mouse button state');
end;
Result.Position := GetPointFromLParam(Message.lParam);
Result.KeyModifiers := GetCurrentModifierKeys();
Result.Count := ButtonState.HandleRepetition(Result.Position, Message.Time);
end;
function TApplication.ConvertMessageToMouseEvent(TopLevelControl: TControl; const Message: TMSG): TMouseEvent;
begin
case Message.message of
WM_LBUTTONDOWN, WM_MBUTTONDOWN, WM_RBUTTONDOWN, WM_LBUTTONUP, WM_MBUTTONUP, WM_RBUTTONUP:
Result := ConvertMessageToMouseButtonEvent(Message);
WM_MOUSEMOVE:
Result := ConvertMessageToMouseMoveEvent(Message);
WM_MOUSEWHEEL:
Result := ConvertMessageToMouseWheelEvent(TopLevelControl, Message);
WM_MOUSELEAVE:
Result := ConvertMessageToMouseLeaveEvent(TopLevelControl, Message);
else
raise EException.Create('Unknown mouse message');
end;
end;
function TApplication.ConvertMessageToMouseLeaveEvent(TopLevelControl: TControl; const Message: TMSG): TMouseLeaveEvent;
begin
Result := TMouseLeaveEvent.Create(MouseManager.Mouse);
Result.Position := TopLevelControl.ScreenToRelative(MouseManager.GetCursorPosition());
end;
function TApplication.ConvertMessageToMouseMoveEvent(const Message: TMSG): TMouseMoveEvent;
begin
Result := TMouseMoveEvent.Create(MouseManager.Mouse);
Result.Position := GetPointFromLParam(Message.lParam);
Result.KeyModifiers := GetCurrentModifierKeys();
end;
function TApplication.ConvertMessageToMouseWheelEvent(TopLevelControl: TControl; const Message: TMSG): TMouseWheelEvent;
begin
Result := TMouseWheelEvent.Create(MouseManager.Mouse);
Result.Delta := TInteger16((Message.wParam and $FFFF0000) shr 16);
Result.Position := TopLevelControl.ScreenToRelative(GetPointFromLParam(Message.lParam));
Result.KeyModifiers := GetCurrentModifierKeys();
end;
function TApplication.ConvertMouseMessage(const Message: TMSG): TTargetedEvent;
var
Event: TMouseEvent;
TopLevelControl: TControl;
Point: TPoint;
begin
if Message.message = WM_MOUSEWHEEL then
begin
Point := GetPointFromLParam(Message.lParam);
TopLevelControl := FindControlWithHandle(WindowFromPoint(Point));
end
else
TopLevelControl := FindControlWithHandle(Message.hwnd);
if TopLevelControl <> nil then
begin
Event := ConvertMessageToMouseEvent(TopLevelControl, Message);
Event.UpdateMouseState();
Result := TTargetedEvent.Create();
Result.Target := TopLevelControl;
Result.Event := Event;
end
else
Result := nil;
end;
procedure TApplication.OpenControl(Control: TControl; TransferFocus: TBoolean; Target: TPagedPanel = nil);
begin
if Target = nil then
Target := DetermineExplorerTarget();
if Target <> nil then
begin
Target.AddPage(Control);
if TransferFocus then
Control.Enter();
end;
end;
function TApplication.Old_OpenControlForValue(Value: TValue; TransferFocus: TBoolean; Target: TPagedPanel = nil): TControl;
var
Path: TValuePath;
begin
Path := TValuePath.Create([Value]);
Path.AddReference();
try
Result := OpenControlForValue(Path, TransferFocus, Target);
finally
Path.ReleaseReference();
end;
end;
function TApplication.OpenControlForValue(Path: TValuePath; TransferFocus: TBoolean; Target: TPagedPanel): TControl;
var
Source: TControl;
begin
Path.AddReference();
try
if Path.Length > 0 then
begin
Source := FocusManager.FocusedControl;
if Source = nil then
Source := MainWindow;
if Source <> nil then
Result := Source.FindFirstSibling(TPathQuery.Create(Path.ExtractLastObject()))
else
Result := nil;
if Result = nil then
begin
Result := ControlFactory.CreateControl(ControlFactory, TControlPurpose.Standalone, Path);
if Result <> nil then
begin
// TODO: We should never assign Result.Path here and instead rely on the control factory to assign a proper path
if Result.Path = nil then
Result.Path := Path;
Result := EmbellishWithToolbar(Result, Path);
OpenControl(Result, TransferFocus, Target);
end;
end
else if TransferFocus then
Result.Enter();
end
else
Result := nil;
finally
Path.ReleaseReference();
end;
end;
procedure TApplication.ShowInformation(Message: TText);
begin
MessageBox(MainWindow.Handle, Message, 'Information', MB_ICONINFORMATION or MB_OK);
end;
function TApplication.PreemptTargetedEvent(TargetedEvent: TTargetedEvent): TBoolean;
begin
if DragAndDropManager.IsActive() then
Result := DragAndDropManager.HandleEvent(TargetedEvent.Target, TargetedEvent.Event)
else if NavigationManager.IsActive then
Result := NavigationManager.HandleEvent(TargetedEvent.Event)
else
Result :=
HotKeyManager.HandleEvent(TargetedEvent.Event)
or DragAndDropManager.HandleEvent(TargetedEvent.Target, TargetedEvent.Event)
or NavigationManager.HandleEvent(TargetedEvent.Event);
end;
{ TTargetedEvent }
destructor TTargetedEvent.Destroy();
begin
Event.Free();
inherited Destroy();
end;
end.
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