TBaseDesigner Events 

Description 

OnActiveChanged 

Occurs when the Active property of the TzCustomFormDesigner changes 

OnDragDrop 

Occurs when the user drops an object being dragged. 

OnDragOver 

Occurs when the user drags an object over a control. 

OnHandleControlMessage 

Occurs on any message sent to managed controls. 

OnKeyDown 

Occurs only at design mode when user presses down any key. 

OnKeyPress 

Occurs only at design mode when key pressed. 

OnKeyUp 

Occurs only at design mode when user releases key that has been pressed. 

OnMouseDown 

Occurs only at design mode when user presses mouse button. 

OnMouseMove 

Occurs only at design mode when user moves mouse. 

OnMouseUp 

Occurs only at design mode when user releases mouse button. 

TzCustomFormDesigner Class 

Description 

OnCanEdit 

Occurs to determine whether Edit method of component editor can be called. 

OnDrawControl 

Occurs when painting any control on the form. Use this event to draw over control. 

OnExecuteAction 

Occurs when ExecuteAction method is called. Use it to handle standard shared actions for currently active designer. 

OnGetComponentLocked 

Occurs to determine whether component is locked. 

OnCanDelete 

Occurs before deleting selected component. 

OnCanInsert 

Occurs before inserting new component. 

OnGetObjectName 

Occurs at the end of GetObjectName method to adjust resulting name. 

OnCanMove 

Occurs before moving selected component. 

OnCanRename 

Occurs before renaming component. 

OnCanResize 

Occurs before resizing selected component. 

OnPopUndo 

Occurs when restoring Target from undo buffer. 

OnCanSelect 

Occurs before selecting component. 

OnPushUndo 

Occurs when saving Target to undo buffer. 

OnCreateComponent 

Occurs before new component creation. 

OnCreateFrame 

Occurs when frame is to be inserted on the form. 

OnSetNewName 

Occurs when assigning name to newly inserted component (created or pasted). 

OnCreateIcon 

Occurs before creating icon for non-visual component. 

OnCreateMethod 

Occurs when new method name is input in object inspector. 

OnFormClosed 

Occurs immediately after hiding the Target form . 

OnUpdateAction 

Occurs when UpdateAction method is called. Use it to handle standard shared actions for currently active designer. 

OnGetComponentHint 

Occurs when the application is about to display the hint window for the particular component. 

OnGetMethodNames 

Occurs when method property editor requests designer for possible method names. 

OnGetScriptProc 

Occurs when method property editor ask for script procedure name associated with a given property. 

OnNotification 

Occurs when components are added or removed to/from Root object at design mode. 

OnRenameMethod 

Occurs when name of method is changed in object inspector. 

OnSetScriptProc 

Occurs when method property editor assigns script procedure to the event. 

OnShowMethod 

Occurs when user double clicks on the procedure in the object inspector. 

OnValidateMethod 

Occurs to validate method.