SelRangeMessageHandler Class Reference

Intercepts messages for the SelRange. (Basically sits there and flushes the Selection's information cache whenever it thinks the selection cache has become invalid). More...

#include <range.h>

Inheritance diagram for SelRangeMessageHandler:

List of all members.

Public Member Functions
	SelRangeMessageHandler ()
	Constructs a SelRangeMessageHandler, an object which, surprisingly, handles messages for its parent SelRange.
Protected Member Functions
MsgResult	Message (Msg *Msg)
	Process messages sent to the SelRange.

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Detailed Description

Intercepts messages for the SelRange. (Basically sits there and flushes the Selection's information cache whenever it thinks the selection cache has become invalid).

Author:

Jason_Williams (Xara Group Ltd) <camelotdev@xara.com>

Date:

07/04/94

Definition at line 496 of file range.h.

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Constructor & Destructor Documentation

SelRangeMessageHandler::SelRangeMessageHandler (   )

Constructs a SelRangeMessageHandler, an object which, surprisingly, handles messages for its parent SelRange. Author: Jason_Williams (Xara Group Ltd) <camelotdev@xara.com> Date: 07/04/94 Parameters: Message,:  The message [INPUTS] -  [OUTPUTS] Returns: - Errors: - See also: MessageHandler Definition at line 5565 of file range.cpp. : MessageHandler(CC_RUNTIME_CLASS(SelRangeMessageHandler), TRUE) { }

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Member Function Documentation

MsgResult SelRangeMessageHandler::Message (  Msg *  Message  )  [protected, virtual]

Process messages sent to the SelRange. Author: Justin_Flude (Xara Group Ltd) <camelotdev@xara.com> Date: 08/04/94 Parameters: Message,:  The message [INPUTS] -  [OUTPUTS] Returns: - Note that a SelChangingMsg is only broadcast at the end of an operation which has changed the selection. Returns: Errors: - See also: MessageHandler Taken out because when the selected spread changes, NodeRenderableInk::DeselectAll() is called which will generate a selection changed message if it needs to. Markn reporting on behalf of the Alpha release bug fixing team, 16/8/94 And now back to the studio else if (MESSAGE_IS_A(Message, SpreadMsg)) { SpreadMsg* pSpreadMsg = (SpreadMsg*) Message; switch (pSpreadMsg->Reason) { case (SpreadMsg::SELCHANGED) : GetApplication()->FindSelection()->Update(TRUE); break; } } Reimplemented from MessageHandler. Definition at line 5592 of file range.cpp. { SelRange* Sel = GetApplication()->FindSelection(); if (MESSAGE_IS_A(Message, DocChangingMsg)) { DocChangingMsg *Msg = (DocChangingMsg *) Message; // ***** Fix for Alpha release 15/8/94 Markn // Put a check in for ABOUTTODIE and KILLED doc messages because we only want to update // the selection once when the document dies (i.e. when ~Document() is called) // This solution makes hugh asumptions on the messages that are generated on document // destruction, and could go wrong in the future. // ***** // Fixed again by Jason, 5/1/95 // This ABSOLUTELY UNEQUIVOCALLY MUST flush the cache! // So if we don't want the msg broadcast, we just pass FALSE to Update() // ***** if (Sel != NULL) { if (Msg->State != DocChangingMsg::ABOUTTODIE && Msg->State != DocChangingMsg::KILLED ) { // Ensure selection cache is flushed. // The TRUE param. makes this broadcast a SelChangingMsg to inform the world // But don't bother doing a flush if it's only a title-changed notification if (Msg->State != DocChangingMsg::TITLECHANGED) Sel->Update(TRUE); } else { // Ensure the selection cache is flushed, but don't broadcast a msg! Sel->Update(FALSE); } } } else if (MESSAGE_IS_A(Message, OpMsg)) { if (((OpMsg*)Message)->MsgType == OpMsg::END) { // Make sure that any delayed message broadcast is now sent out. // This is used to allow Ops to make multiple changes to the selection, // yet only cause one SelChangingMsg broadcast (when they End). GetApplication()->FindSelection()->BroadcastAnyPendingMessages(); } } else if (MESSAGE_IS_A(Message, ToolsCurrentAttrGroupChangedMsg) || MESSAGE_IS_A(Message, CurrentAttrChangedMsg) || MESSAGE_IS_A(Message, SelChangingMsg) ) { // This convenient message gets sent out whenever a user needs to // reflect a change in the common attributes. Usually the user will // call Range::FindCommonAttribute\s is receipt of this message. // The FindCommonAttribute fns return Current Attributes in certain // cases which is why the message is broadcast when there is a // change in these as well. Sel->AttrsHaveChanged(); // The CommonAttributeCache is no longer valid. BROADCAST_TO_ALL(CommonAttrsChangedMsg); } /********** Taken out because when the selected spread changes, NodeRenderableInk::DeselectAll() is called which will generate a selection changed message if it needs to. Markn reporting on behalf of the Alpha release bug fixing team, 16/8/94 And now back to the studio else if (MESSAGE_IS_A(Message, SpreadMsg)) { SpreadMsg* pSpreadMsg = (SpreadMsg*) Message; switch (pSpreadMsg->Reason) { case (SpreadMsg::SELCHANGED) : GetApplication()->FindSelection()->Update(TRUE); break; } } */ return OK; }

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The documentation for this class was generated from the following files:

• Kernel/range.h (r1785/r1252)
• Kernel/range.cpp (r1785/r1744)

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