selector.h

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// $Id: selector.h 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
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----------------------------------

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=================================XARAHEADEREND============================
 */
// The selector tool and associated operations.

#ifndef INC_SELECTOR
#define INC_SELECTOR

#include "dragtool.h"
#include "transop.h"
//#include "doccoord.h" - in camtypes.h [AUTOMATICALLY REMOVED]
#include "blobs.h"
//#include "binds.h" - in camtypes.h [AUTOMATICALLY REMOVED]

#define OPTOKEN_SELECTOR_DRAGBOX        _T("SelectorDragBox")
#define OPTOKEN_SELECTOR_DRAGCENTRE     _T("SelectorDragCentre")

class OpState;          // #include "opdesc.h"
class Cursor;           // #include "csrstack.h"
class Spread;
class SelectorInfoBarOp;
class SelChangingMsg;
class DocViewMsg;
class KeyPress;


/********************************************************************************************
>   class OpSelectorDragBox : public Operation

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    1/7/93
    Purpose:    This operation is started when the user does a drag over the document, that
                started in empty space. A drag box will be drawn out over the document as the
                user moves the mouse about and when the drag ends, all the objects wholly
                inside the box will be selected.
********************************************************************************************/

class OpSelectorDragBox : public Operation
{
public:

    // Construction/Destruction
    OpSelectorDragBox();

    // The all important Do functions
    void StartDragBox( Spread* pSpread, DocCoord Anchor, ClickModifiers);
    virtual BOOL SnappingDrag() { return FALSE; }
    
    // Virtual functions needed for the dragging operations to work
    virtual void DragPointerMove(DocCoord, ClickModifiers, Spread*, BOOL bSolidDrag);
    virtual void DragFinished(DocCoord, ClickModifiers, Spread*, BOOL, BOOL bSolidDrag);

    // Some Render functions to will draw the EORed path
    void RenderDragBlobs(DocRect, Spread*, BOOL bSolidDrag);
        
    // These functions required for the OpDescriptor class
    static BOOL Declare();
    static OpState GetState(String_256* Description, OpDescriptor*);

private:
    
    CC_DECLARE_DYNCREATE(OpSelectorDragBox);

    // Member vars of the operation
    Spread*  StartSpread;           // The spread where the drag started
    DocCoord StartPoint;            // The point where the drag started
    DocCoord LastMousePosition;     // The last position the mouse was in
};



/********************************************************************************************
>   class OpDragRotateCentre : public Operation

    Author:     Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
    Created:    several deadlines previous, I can assure you
    Purpose:    Allows you to drag the selector tool's centre of rotattion around
    SeeAlso:    -
********************************************************************************************/

class OpDragRotateCentre : public Operation
{
public:

    // Construction/Destruction
    OpDragRotateCentre();

    // This is called by the tool when a drag has been started.
    void StartDragCentreBlob(Spread*, const DocCoord&, ClickModifiers);
    
    // Virtual functions needed for the dragging operations to work
    virtual void DragPointerMove(DocCoord, ClickModifiers, Spread*, BOOL bSolidDrag);
    virtual void DragFinished(DocCoord, ClickModifiers, Spread*, BOOL, BOOL bSolidDrag);
    virtual BOOL DragKeyPress(KeyPress* pKey, BOOL bSolidDrag);

    // Some Render functions to will draw the EORed path
    void RenderDragBlobs(DocRect, Spread*, BOOL bSolidDrag);
        
    // These functions required for the OpDescriptor class
    static BOOL Declare();
    static OpState GetState(String_256* Description, OpDescriptor*);

    // This generates a little rectangle enclosing the rotation centre blob.
    static DocRect CalcBlobClipRect(const DocCoord& dcPos);

private:

    CC_DECLARE_DYNCREATE(OpDragRotateCentre);

    // Helper functions.
    void GetNearestBlob(const DocCoord& dcPos, DocCoord* pPos, INT32* pBlob) const;

    // Data members.
    Spread*       m_pStartSpread;
    DocCoord      m_dcFirstPos;
    DocCoord      m_dcLastPos;
    DocCoord      m_dcLastMousePos;
};



/********************************************************************************************
>   class SelectorTool : public DragTool

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    20/7/93
    Purpose:    The Selector tool is used to change the selection, edit objects and
                transform them.
********************************************************************************************/

/********************************************************************************************

>   class CCAPI SelectorTool : public DragTool

    Author:     Karim_MacDonald (Xara Group Ltd) <camelotdev@xara.com>
    Created:    14/10/1999
    Purpose:    The Selector tool now derives from the DragTool, so that TransOperation
                may refer to a general DragTool when an object drag is in progress.
                At a later date, drag functionality may be pulled up into DragTool,
                to allow future tools to implement dragging of objects more easily.

********************************************************************************************/
class CCAPI SelectorTool : public DragTool
{

// Tool interface

public:

    // Creation & destruction.
    SelectorTool();
    virtual ~SelectorTool();
    BOOL Init();

    // Attributes.
    void Describe(void* InfoPtr);
    UINT32 GetID() { return TOOLID_SELECTOR; };
    
    // Event handlers etc.
    virtual void SelectChange(BOOL);
    virtual void OnClick(DocCoord, ClickType, ClickModifiers, Spread*);
    virtual void OnMouseMove(DocCoord, Spread*, ClickModifiers);
    virtual BOOL OnKeyPress(KeyPress* pKey);
    virtual BOOL OnIdle();
    virtual void RenderToolBlobs(Spread* pSpread, DocRect* pClipRect);

    // Function that allows the transform to tell the tool how things are going
    void DragMove(TransformBoundingData* pBoundingData);
    
    // This is called to notify the tool when a drag has finished so it can tidy up
    // appropriately.
    virtual BOOL DragFinished(DragEndType det);

    // This function can can called by Operations to turn idle processing on or off.
    // They need to do this to prevent the tool overwriting status bar text etc.
    static void AllowIdleWork(BOOL fIsAllowed);
    
    static BOOL IsSelectorCaching(){ return fSelectorIsCaching;};

    // This function returns TRUE if the given floating-point value exceeds the range
    // that FIXED16 numbers can represent.
    static BOOL BeyondFixedRange(double fpFixedVal);

    virtual BOOL AreToolBlobsRenderedOnSelection() {return TRUE;}

    // CGS:  support functions for profile dialogs - see NOTES where variable are defined

    static BOOL GetNormalClick_CheckProfileDialog () { return (bNormalClickCheckProfileDialog); }
    static void SetNormalClick_CheckProfileDialog (BOOL newVal) { bNormalClickCheckProfileDialog = newVal; }

private:

    BOOL fAllowIdleProcessing;          // if TRUE then perform OnIdle stuff
    BOOL fMouseHasMoved;                // sort of ditto
    static BOOL fSelectorIsCaching;     // set during a cache - avoids bar redraws

    // More attributes.
    static TCHAR* FamilyName;           // The Tools Family Name
    static TCHAR* ToolName;             // The Tool Name
    static TCHAR* Purpose;              // What the tool is for
    static TCHAR* Author;               // Who wrote it

    static INT32 CursorStackID;         // My cursor (stack position) handle
//  static INT32 pCursor;               // Pointer to my current cursor

    // own up in memory dumps
    CC_DECLARE_MEMDUMP(SelectorTool);


// View & selection message handling.

public:

    // Called when the view or selection changes.
    void SelectionHasChanged(BOOL DontUpdate =0);
    void AttributeHasChanged();
    void ViewChanged(const DocViewMsg& msg);
    BOOL UpdateSelectionInfo();

    // Attributes.
    Spread* GetSelectionSpread() const;
    const DocRect& GetSelectionBounds(BOOL WithNoAttrs = FALSE) const;
    const BOOL GetAreaDetails(BOOL WithNoAttrs, XLONG* pxlArea, XLONG* pxlPerim) const;

private:

    // Information about the selected object(s).
    Spread*     SelectionSpread;
    SelRange*   SelectRange;
    DocRect     SelectionRect;
    DocRect     SelectionRectNoAttr;

    XLONG       xlSelectionArea;
    XLONG       xlSelectionPerim;

    // When true we will ignore selection changed messages.
    BOOL        fIgnoreSelChange;


// Click & drag handling.

public:
    static NodeRenderableInk* FindPreProcessClickNode(Spread* pSpread,
                                                      DocCoord ClickPos,
                                                      BOOL Interruptible = FALSE);

protected:

    // Top-level mouse handlers.
    virtual BOOL PreProcessClick();
    virtual BOOL ProcessObjectClick();
    virtual void PostProcessClick();

    // Click event handlers.
    virtual void HandleSingleClick();
    virtual void HandleDoubleClick();
    virtual void HandleDragClick();
    virtual void HandleButtonUp();

    // Key handler.
    virtual void HandleTabKey(BOOL fIsShifted);

    // The IterateFlags structure provides a little control over tab-iteration of nodes.
    // It currently contains flags to indicate whether to ignore locked or invisible layers.
    struct IterateFlags
    {
        IterateFlags(   BOOL IgInvisibleLayers  = FALSE,
                        BOOL IgLockedLayers     = FALSE )
        {
            IgnoreInvisibleLayers   = IgInvisibleLayers;
            IgnoreLockedLayers      = IgLockedLayers;
        }

        BOOL IgnoreInvisibleLayers  :1;
        BOOL IgnoreLockedLayers     :1;
    };

    // we need to maintain a record of the layer we started on, so we don't infinitely loop
    // around the same layers again and again.
    Layer* m_pIterStartLayer;

    // These functions are for tabbing through the selection.

    Node* IteratePreProcess(Node* pCurrent);
    NodeRenderableInk* IterateNextInk(Node* pCurrent, IterateFlags iterFlags);
    NodeRenderableInk* IteratePrevInk(Node* pCurrent, IterateFlags iterFlags);
    NodeRenderableInk* IteratePostProcessNext(  Node* pCurrent, Node* pParent,
                                                IterateFlags iterFlags );
    NodeRenderableInk* IteratePostProcessPrev(  Node* pCurrent, Node* pParent,
                                                IterateFlags iterFlags );

private:

    // Returns TRUE if the current click is on the rotation centre blob.
    BOOL IsRotateCentreClicked(DocCoord ClickStart) const;

    // Returns TRUE if the user is holding down the translation op shortcut keys.
    BOOL IsTranslateShortcut(ClickModifiers cmods) const;
    
    // Returns TRUE if the current mouse click has been "modified", eg. Adjust, Constrain etc.
    BOOL IsClickModified(ClickModifiers cmods) const;

    // This detects whether the current click means "select-under", allowing for the
    // SelectUnderLikeArtWorks preference.
    BOOL IsSelectUnderClick(ClickModifiers cmods) const;

    // Returns TRUE if the current set of click modifiers indicates "select-inside".
    BOOL IsSelectMemberClick(ClickModifiers cmods) const;

    // Returns TRUE if the current set of click modifiers indicates "select-leaf".
    BOOL IsSelectLeafClick(ClickModifiers cmods) const;

    // These provide some shorthand to the FindSimple/FindCompound hit-testing functions in
    // NodeRenderableInk.  They are "hard-wired" to use the current click position.
    NodeRenderableInk* FindFrom(NodeRenderableInk* pSimpleNode) const;

    // Like the above, but for FindInnerCompound and unrelated to the click position.
    NodeRenderableInk* EnsureInkNext(Range* range, Node* pNode) const;
    NodeRenderableInk* EnsureInkPrev(Range* range, Node* pNode) const;

    // Declaration of click action code...
    enum    ClickActionCode {
                            CLICKACTION_NONE,
                            CLICKACTION_BOUNDTOPLEFT,
                            CLICKACTION_BOUNDTOP,
                            CLICKACTION_BOUNDTOPRIGHT,
                            CLICKACTION_BOUNDLEFT,
                            CLICKACTION_BOUNDRIGHT,
                            CLICKACTION_BOUNDBOTTOMLEFT,
                            CLICKACTION_BOUNDBOTTOM,
                            CLICKACTION_BOUNDBOTTOMRIGHT,
                            CLICKACTION_BOUNDTRANSFORMORIGIN,
                            CLICKACTION_SELNONE,
                            CLICKACTION_SELNODE,
                            CLICKACTION_SELUNDER,
                            CLICKACTION_SELUNDERCYCLE,
                            CLICKACTION_SELUNDERFAIL,
                            CLICKACTION_SELUNDERFAIL2,
                            CLICKACTION_SELINSIDE,
                            CLICKACTION_SELINSIDECYCLE,
                            CLICKACTION_SELINSIDEFAIL,
                            CLICKACTION_SELINSIDEFAIL2,
                            CLICKACTION_SELLEAF
                        };
                        
    // Determine what action needs to be taken in response to a click
    ClickActionCode DetermineClickAction(NodeRenderableInk** ppActionNode,
                                         NodeRenderableInk* pLastClickNode,
                                         NodeRenderableInk* pClickSimpleNode,
                                         NodeRenderableInk* pClickCompoundNode,
                                         Spread* pStartSpread,
                                         DocCoord ClickStart,
                                         ClickModifiers ClickMods);
    ClickActionCode CycleClickAction(NodeRenderableInk** ppActionNode,
                                     NodeRenderableInk* pClickCompoundNode,
                                     ClickActionCode foundAction,
                                     ClickActionCode cycleAction);
    BOOL ValidateLastClickUnder(NodeRenderableInk* pLastClickNode, Spread* pStartSpread, DocCoord ClickStart);
    BOOL ValidateLastClickInside(NodeRenderableInk* pLastClickNode, NodeRenderableInk* pClickSimpleNode);

    // Data members.
    DocCoord            ClickStart;
    Spread*             StartSpread;
    ClickModifiers      ClickMods;
    ClickType           TypeOfClick;
    INT32               nClickedBoundsBlob;
    BOOL                fPossibleToggleClick;
    BOOL                fIsBlobDrag;

    // These are used for the "select-under" feature, which must maintain data across clicks.
/*  NodeRenderableInk*  pClickedNode;
    NodeRenderableInk*  pSimpleClickedNode;
    NodeRenderableInk*  pLastClickedNode;
    NodeRenderableInk*  pLastUnderNode;
    NodeRenderableInk*  pLastSimpleNode;
    NodeRenderableInk*  pLastInsideNode;
*/
    NodeRenderableInk*  pClickSimpleNode;
    NodeRenderableInk*  pClickCompoundNode;
    NodeRenderableInk*  pLastClickNode;
    NodeRenderableInk*  pPreProcClickNode;

// Transformations (and the other drags).

public:

    // This is called when a drag has moved the rotation centre.
    void RotationCentreDragged(const DocCoord& dcNewPos);

    // This tells the selector tool to restore the rotation centre to the middle of the
    // selection bounds at the next opportunity.
    void InvalidateRotationCentre();

private:

    // This gets default settings for the transform params from the info-bar.
    void GetUserParams();

    // These initialise a mouse-drag transform.
    void DoScale();
    void DoSquash();
    void DoShear();
    void DoTranslate();
    void DoRotate();

    // These are non-transform drags.
    void DoDragBox();
    void DoDragRotateCentre();

    // These start a mouse-drag transform & an immediate (info-bar) transform, respectively.
    BOOL StartXformDrag(TransOperation* pXformDragOp, DragType dragtype);
    BOOL StartXformImmediate(const TCHAR* chOpToken, void* pvParam2);

    // Parameters for a transformation.
    TransformData   tdParams;
    DocCoord        dcRotateCentre;
    BOOL            fRotateCentreIsValid;

    // A structure that contains the position, size etc of the selection
    // (ie whats in the info bar)
    TransformBoundingData BoundingData;


// Info-bar data & functions.

public:
    
    // Called by the info-bar when the user changes certain buttons.
    void SelectionBlobChange(BlobStyle ChangingBlobs);
    void BoundsButtonChange();
    void RotateButtonChange(BOOL fNewState);
    void FlipButtonChange(BOOL fIsVertical);
    void SetRotateCentre(INT32 nBlob);

    // These run keyboard transformations, ie. those started by typing in an edit-field.
    void DoTranslateImmediate(MILLIPOINT nXpos, MILLIPOINT nYpos);
    void DoScaleImmediate(MILLIPOINT nWinc, MILLIPOINT nHinc);
//  void DoScaleImmediate(MILLIPOINT nWinc, MILLIPOINT nHinc, BOOL);
    void DoScalePercentImmediate(double nWpercent, double nHpercent);
    void DoRotateImmediate(ANGLE nAngle);
    void DoShearImmediate(ANGLE nAngle);

    // A public interface onto the DoTranslate() method, so that somebody other than the
    // selector tool can tell the selector tool to drag objects around.
    void PublicDoTranslate();

    // This function switches the settings of the info-bar back to known defaults, eg.
    // rotate blobs OFF, don't leave copies etc.
    void ResetDefaults();

    // This sets the status bar text to the given string.
    static void SetStatusText(UINT32 nStringID);
    static void SetStatusText(String_256* pStr);
    static void UnCacheInfoBar(BOOL = FALSE);

    // Interogate the current tool for status line text
    virtual BOOL GetStatusLineText(String_256* ptext, Spread* pSpread,
                                   DocCoord DocPos, ClickModifiers cmods);

    void FigureUserFeedback(Spread* pSpread,
                            DocCoord dcMousePos,
                            ClickModifiers cmods,
                            BOOL DoSlowTests,
                            String_256* pStr,
                            Cursor** ppPointerShape);
    BOOL Append(String_256* pStr, UINT32 StringID);
    BOOL Append(String_256* pStr, String_256 String);
    BOOL Append(String_256* pStr, ClickModifiers cmods,
                                  UINT32 SelectID,
                                  UINT32 AddID,
                                  UINT32 RemoveID,
                                  NodeRenderableInk* pActionNode = NULL);
    BOOL Append(String_256* pStr, ClickModifiers cmods,
                                  String_256 SelectTemplate,
                                  String_256 AddTemplate,
                                  String_256 RemoveTemplate,
                                  NodeRenderableInk* pActionNode = NULL);

private:

    // This reads preferences from the .INI file, returning TRUE if they are all there etc.
    static BOOL ReadPrefs();

    // Points to this tool's info-bar
    static SelectorInfoBarOp* pInfoBarOp;

    // This is our friend . . .
    friend class SelectorInfoBarOp;



// Blob management.

public:

    // This defines constants to indicate what kind of tool blobs the selector can
    // display.
    enum BlobType
    {
        NO_BLOBS,               // use the fShowToolBlobs flag instead of this!
        BOUNDS_BLOBS,
        ROTATE_BLOBS
    };

    // Called by the info-bar when it needs to know the settings of the blob buttons.
    BlobStyle GetBlobStyle() const;
    BlobType  GetCurrentToolBlobType() const;

    // This inflates the given rectangle by the "blob border", ie. the amount that bounds blobs
    // are offset by when drawing them around a selected object.  This function is also useful
    // in the zoom tool.
    static INT32 GetBlobBorderSize(void);
    static void InflateByBlobBorder(DocRect* pdrRect);

    static void AllowGuidelineScan (BOOL newVal = TRUE) { bGlineSAllowed = newVal; }

private:

    // These draw the appropriate blobs in the right places.
    void RenderBoundBlobs(Spread*, DocRect*, const DocRect&);
    void RenderRotateBlobs(Spread*, DocRect*, const DocRect&);
    void RenderRotateCentre(RenderRegion*, const DocCoord&);

    // These calculate the position of blobs around the selection.
    DocRect  InflatedSelRect() const;
    DocCoord GetBoundsBlobPos(INT32 nBlob) const;
    DocCoord GetSelPosNearBlob(INT32 nBlob) const;

    // These convert a mouse coordinate into the appropriate blob number, if any.
    INT32 BoundsBlobHitTest(const DocCoord& dcMousePos) const;
    static BOOL IsNearBlob(const DocCoord& dcBlobOrigin, const DocCoord& dcTestPoint);

    // This handles changing the cursor when it moves over a blob.
    void ChangeCursorAndText(INT32 nBlobID, String_256* pStr, Cursor** pPointerShape);

    // These handle changing the cursor according to which modifier keys are up or down.
    void SetKeyDownCursor(ClickModifiers cmods);
    void ResetCursorNow();

    // Func that gets the tool to render it's blobs when the selection changes, but only if the current
    // tool is not the selector tool.
    void RenderOtherToolBlobs();

    // Data members.
    static BlobManager* pBlobManager;
    BlobStyle           bsBlobStyle;
    BlobType            eCurrentBlobs;
    BOOL                fShowToolBlobs;

    INT32                   nLastSelectedBlob;
    BOOL                fValidSelectedBlob;
    BOOL                m_bComputeAreaDetails;

    // Cursor stuff.
//  unsigned            fKeyStates;                 // used as a bit-field
//  BOOL                fCursorOverBlob;
//  BOOL                fCursorOverGradFillBlob;
//  BOOL                fKeyDownCursor;

    Cursor*             pNormalCursor;
    Cursor*             pAdjustCursor;
    Cursor*             pUnderCursor;
    Cursor*             pInsideCursor;
    Cursor*             pUnderAdjustCursor;
    Cursor*             pInsideAdjustCursor;
    Cursor*             pLeafCursor;
    Cursor*             pLeafAdjustCursor;

    Cursor*             pALLCursor;
    Cursor*             pNWSECursor;
    Cursor*             pNESWCursor;
    Cursor*             pNSCursor;
    Cursor*             pWECursor;
    Cursor*             pGradFillCursor;
    Cursor*             pDragRotateCursor;
    Cursor*             pHorzGuideCursor;
    Cursor*             pVertGuideCursor;
//  Cursor*             pLastKeyDownCursor;

    // Various preferences.
    static INT32            nBlobBorder;
    static unsigned     fBlobPref;
    static BOOL         fAllowCorelToggleClick;
    static BOOL         fSelectUnderLikeArtWorks;

    // CGS:  wo there!  when selecting another object, everything is deselected - and then just that node
    // selected.  This is a problem, since if we proceed regardless, the profile dialog closes (when it
    // possibly shouldn't have).  As such, we now check for this occurring ....
    // NOTE:  it has to be done within the selector tool cause the problem occurs internally!
    static BOOL         bNormalClickCheckProfileDialog;     // you need to check the profile dialog again buddy!

    // CGS:  wo there!  now that I've implemented selection capability for all tools, it is undesirable to allow
    // them to move guidlines about!

    static BOOL         bGlineSAllowed;

protected:
    // Preferences used by our friend InfoBarOp class
    static BOOL         fSlaveLineWidthToButton;
    static BOOL         fConsiderLineWidths;
    static BOOL         fUseScalingFix;
    static BOOL         bPageDoubleClickOpenFile;

    // These classes have special access.
    friend class OpDragRotateCentre;
};

#endif  // INC_SELECTOR

---