ctrlhelp.h

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00001 // $Id: ctrlhelp.h 1282 2006-06-09 09:46:49Z alex $
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00003 ================================XARAHEADERSTART===========================
00004  
00005                Xara LX, a vector drawing and manipulation program.
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00009 
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00095 
00096 =================================XARAHEADEREND============================
00097  */
00098 
00099 // Code to modify the behaviour of controls on Camelot bars so that they respond
00100 // to help messages and can be dragged about etc.
00101 
00102 #ifndef INC_CTRLHELP
00103 #define INC_CTRLHELP
00104 
00105 //#include "monotime.h" - in camtypes.h [AUTOMATICALLY REMOVED]
00106 
00107 class OpDescriptor;
00108 class ControlTable;
00109 class BarTable;
00110 class BubbleHelpWnd;   
00111 
00112 #define COMMIT 2
00113 
00114 /********************************************************************************************
00115 
00116 >   class ControlHelpInfo
00117 
00118     Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
00119     Created:    10/05/94
00120     Purpose:    Used to specify details of a control that is to be added to the list of
00121                 sub-classed controls. The fields are:
00122                 MonoOn
00123                 pOpDesc - pointer to the OpDescriptor for this control.
00124                           If this field is non-NULL, then all the ID fields are ignored.
00125                           Id this field is NULL, then the ID fields are used to define the
00126                           bubble help text and status bar text to be displayed for this
00127                           control.
00128                 BubbleID - ID of the string resource to be used for bubble help.
00129                 StatusID - ID of the string resource to be used for status bar text.
00130                 ModuleID - defines where to find the above resources.
00131                 Parent - internal use; any value you put in here will be ignored.
00132                 MonoOff
00133     SeeAlso:    ControlHelper::NotifyControlCreated
00134 
00135 ********************************************************************************************/
00136 
00137 class ControlHelpInfo
00138 {
00139 public:
00140     OpDescriptor* pOpDesc;
00141     UINT32 BubbleID;
00142     UINT32 StatusID;
00143     UINT32 ModuleID;
00144     wxWindow* Parent;
00145 };
00146 
00147 /********************************************************************************************
00148 
00149 < BubbleHelpCallback
00150 
00151     Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
00152     Comment:    This is a function that is called by the bubble help system when providing
00153                 'ad-hoc' bubble help on a window, i.e. not on 'real' controls, but on
00154                 GUI elements which may be just rendered, e.g. the colour bar uses this
00155                 facility.
00156                 You pass a function of this type into ControlHelper::DoBubbleHelpOn(), and
00157                 this function is called back when the bubble help needs to be displayed.
00158                 You should return a pointer to the bubble help text to display.
00159 
00160                 MonoOn
00161                 typedef TCHAR *(*BubbleHelpCallback)(wxWindow*, UINT32, void*);
00162                 MonoOff
00163 
00164                 The parameters provide context information for the callback as there is
00165                 usually a delay between calling DoBubbleHelpOn(), and the callback being
00166                 called (because there is a short time delay before bubble help appears).
00167 
00168     Inputs:     wxWindow* - the handle of the window that bubble help is being provided on.
00169                 UINT32 - the 'psuedo-ID' you passed in to DoBubbleHelpOn() which indicates
00170                        which GUI element in the window that bubble help is being provided
00171                        for.  This number is determined by you - it means nothing to the
00172                        bubble help system, apart from when it does an equality check to
00173                        see if the user has moved onto another GUI element in your window.
00174                 void* - an arbitrary piece of data associated with you system which may
00175                         provide more assistance in working out the context of the call.
00176                         This data is the data you pass in to DoBubbleHelpOn.
00177 
00178     SeeAlso:    ControlHelper::DoBubbleHelpOn
00179 
00180 ********************************************************************************************/
00181 
00182 
00183 /********************************************************************************************
00184 
00185 >   class ControlHelper : public SimpleCCObject
00186 
00187     Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
00188     Created:    01/07/94
00189     Purpose:    Provide a system for subclassing controls on Camelot bars which offers
00190                 various facilities such as bubble help/status bar text and commit handling.
00191                 To use this system you use the Notifyxxx() functions to keep the class up
00192                 to date with which bars/controls exist.  This module will subclass these
00193                 controls and do some preprocessing of Windows messages in order to do
00194                 bubble help/commit handling etc.
00195                 You can 'fake' bubble help on a window that doesn't really have controls
00196                 in it, by using the 'ad-hoc' bubble help function, DoBubbleHelpOn().
00197     SeeAlso:    ControlHelpInfo;
00198                 ControlHelper::NotifyBarCreated; ControlHelper::NotifyBarDeleted;
00199                 ControlHelper::NotifyBarChanged;
00200                 ControlHelper::NotifyControlCreated; ControlHelper::NotifyControlDeleted
00201                 ControlHelper::DoBubbleHelpOn
00202 
00203 ********************************************************************************************/
00204 
00205 class ControlHelper : public SimpleCCObject
00206 {
00207 public:
00208     // Interface for use by the routines that manage bars + child controls.
00209     static BOOL Init();
00210     static void DeInit();
00211 
00212     static BOOL NotifyBarCreated(wxWindow*);
00213     static BOOL NotifyBarDeleted(wxWindow*);
00214     static BOOL NotifyBarChanged(wxWindow* Old, wxWindow* New);
00215     static BOOL NotifyControlCreated(wxWindow*, ControlHelpInfo*);
00216     static BOOL NotifyControlCreated(wxWindow*, OpDescriptor*);
00217     static BOOL NotifyControlDeleted(wxWindow*);
00218 
00219     // Allow the control Bubble help to be changed on the fly
00220     static BOOL NotifyControlChanged(wxWindow*, ControlHelpInfo*);
00221 
00222     typedef TCHAR *(*BubbleHelpCallback)(wxWindow*, UINT32, void*);
00223 
00224     static void DoBubbleHelpOn(wxWindow*, UINT32, BubbleHelpCallback, void*);
00225 
00226     static void ServiceBubbleHelp();
00227     static void BubbleHelpDisable();
00228 
00229     static void InformModalDialogOpened();
00230     static void InformModalDialogClosed();
00231     static BOOL GetStatusLineText(String_256* ptext, wxWindow* window);
00232 
00233     static BOOL IsUserInterfaceCaptured();
00234 
00235 private:
00236     static void BubbleHelpKill();
00237 
00238     static BOOL AddControl(wxWindow*, ControlHelpInfo *);
00239     static ControlTable  *Controls;
00240     static BarTable      *Bars;
00241     static BubbleHelpWnd *BubbleWnd;
00242 
00243     static LRESULT CALLBACK MyWndProc(wxWindow*, UINT32, WPARAM, LPARAM);
00244     static MonotonicTime PendingTimer;
00245     static POINT LastPos;
00246     static wxWindow* LastControl;
00247     static BOOL ControlHasFocus;
00248 
00249     static wxWindow* AdHocWindow;
00250     static UINT32 AdHocControl;
00251     static BOOL AdHocControlIsDifferent;
00252     static void *AdHocReference;
00253     static BubbleHelpCallback AdHocCallback;
00254 
00255     typedef enum
00256     {
00257 
00258         STATE_DEAD,             // No bubble help is displayed - cursor is not over a
00259                                 // a bar or a control.
00260 
00261         STATE_ACTIVE,           // Bubble help is displayed - cursor is over a control.
00262 
00263         STATE_INITIAL_PENDING,  // Waiting to show bubble help for the first time - the 
00264                                 // cursor is over a control.
00265 
00266         STATE_UPDATE_PENDING,   // Waiting to display help for a different control - i.e.
00267                                 // the user has moved from one control to another,
00268                                 // possible via a bar (STATE_DISABLED).
00269 
00270         STATE_INITIAL_DISABLED, // Pointer is over bar, but no help has yet been displayed 
00271                                 // during this session.
00272 
00273         STATE_DISABLED          // Pointer over bar, and bubble help has been displayed
00274                                 // during this session.
00275 
00276     } BubbleState;
00277 
00278     static BubbleState BubbleHelpState;
00279 
00280     // Number of modal dialogs open (that are NOT managed by the kernel dialog manager)
00281     static INT32 ModalDialogs;
00282 
00283     // State control functions
00284 PORTNOTE( "dialog", "Remove function that needs WNDPROC" )
00285 #if 0
00286     static void BubbleHelpStateMachine(POINT Pos, wxWindow* ThisControl, WNDPROC WndProc);
00287 #endif
00288     static void SetState(BubbleState NewState, wxWindow* Window = NULL);
00289     static void DeadHandler();
00290     static void ActiveHandler(wxWindow* Window);
00291     static void InitialPendingHandler();
00292     static void InitialDisabledHandler();
00293     static void UpdatePendingHandler();
00294     static void DisabledHandler();
00295 };
00296 
00297 
00298 
00299 /********************************************************************************************
00300 
00301 >   class ControlEntry
00302 
00303     Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
00304     Created:    26/04/94
00305     Purpose:    Contains the information for a particular control.
00306                 The data members are:
00307                 MonoOn
00308                 wxWindow* Window - the handle of the control.
00309                 OpDescriptor *pOpDesc - pointer to the OpDescriptor associated with this
00310                                         control.
00311                 WNDPROC WndProc - pointer to the normal WndProc for the subclassed control.
00312                 MonoOff
00313     SeeAlso:    ControlTable; ControlHelper
00314 
00315 ********************************************************************************************/
00316 
00317 class ControlEntry
00318 {
00319 public:
00320     wxWindow* Window;           // Handle of the control being sublassed (may be a subwindow of
00321                             // a control).
00322     wxWindow* Parent;           // Not necessarily the immediate parent - just the handle of the
00323                             // parent control, or none if this *is* the parent control.
00324     OpDescriptor *pOpDesc;  // The OpDescriptor for this control, or NULL if there isn't one.
00325     UINT32 BubbleID;            // String resource ID for bubble help.
00326     UINT32 StatusID;            // String resource ID for status bar text.
00327     UINT32 ModuleID;            // Module ID to be used when loading bubble help/status 
00328                             // bar string resources.
00329 PORTNOTE( "dialog", "Remove WNDPROC usage" )
00330 #if 0
00331     WNDPROC WndProc;        // Normal WndProc for this control.
00332 #endif
00333 
00334     BOOL AddCommitHandling; // This flag is set to TRUE if the control is an edit or a combo 
00335                             // it is used in the subclass procedure to determine if we
00336                             // should respond to Enter and Tab keys being pressed
00337                             // - Added by Simon (08/06/94)
00338     BOOL ControlStatusLineText(String_256* text);
00339 };
00340 
00341 
00342 /********************************************************************************************
00343 
00344 >   class ControlTable : public SimpleCCObject
00345 
00346     Author:     Tim_Browse (Xara Group Ltd) <camelotdev@xara.com>
00347     Created:    26/04/94
00348     Purpose:    Stores/manipulates an array of ControlEntry objects, in order to keep
00349                 track of all the controls we have currently subclassed.
00350     SeeAlso:    ControlEntry; ControlHelper
00351 
00352 ********************************************************************************************/
00353 
00354 class ControlTable : public SimpleCCObject
00355 {
00356 public:
00357     ControlTable();
00358     ~ControlTable();
00359     BOOL Init();
00360 
00361 PORTNOTE( "dialog", "Remove function that needs WNDPROC" )
00362 #if 0
00363     BOOL AddControl(wxWindow*, ControlHelpInfo*, WNDPROC);
00364     WNDPROC DeleteControl(wxWindow* Window, wxWindow* *RealWindow);
00365 #endif
00366     ControlEntry *FindControl(wxWindow* Window);
00367     BOOL ChangeControl(wxWindow*, ControlHelpInfo*);
00368 
00369 private:
00370     INT32 FindControlIndex(wxWindow* Window, BOOL IgnoreChildren = TRUE);
00371 
00372     enum
00373     {
00374         NotFound = -1,
00375         EmptySlot = 0,
00376         Granularity = 30,
00377         InitialSize = 100
00378     };
00379 
00380     ControlEntry *Table;
00381     INT32 TableSize;
00382 
00383     // State information - used when scanning the table for controls.
00384     wxWindow* LastWindow;
00385     INT32  LastIndex;
00386 };
00387 
00388 #endif
00389 

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