// $Id: oprotate.cpp 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. Copyright (C) 1993-2006 Xara Group Ltd. Copyright on certain contributions may be held in joint with their respective authors. See AUTHORS file for details. LICENSE TO USE AND MODIFY SOFTWARE ---------------------------------- This file is part of Xara LX. Xara LX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 2 as published by the Free Software Foundation. Xara LX and its component source files are distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 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Xara Group Ltd, Gaddesden Place, Hemel Hempstead, HP2 6EX, UK. http://www.xara.com/ =================================XARAHEADEREND============================ */ // The Rotate transform Operation /* */ #include "camtypes.h" #include "oprotate.h" //#include "app.h" - in camtypes.h [AUTOMATICALLY REMOVED] //#include "docview.h" - in camtypes.h [AUTOMATICALLY REMOVED] //#include "ink.h" - in camtypes.h [AUTOMATICALLY REMOVED] //#include "trans2d.h" - in camtypes.h [AUTOMATICALLY REMOVED] //#include "rik.h" #include "selector.h" //#include "clikdrag.h" DECLARE_SOURCE("$Revision: 1282 $"); // An implement to match the Declare in the .h file. CC_IMPLEMENT_DYNCREATE(OpRotateTrans, TransOperation) // This will get Camelot to display the filename and linenumber of any memory allocations // that are not released at program exit #define new CAM_DEBUG_NEW /******************************************************************************************** > OpRotateTrans::OpRotateTrans() Author: Rik_Heywood (Xara Group Ltd) Created: 20/7/93 Purpose: Constructor. Does nothing. ********************************************************************************************/ OpRotateTrans::OpRotateTrans(): TransOperation() { // Set status help text StatusHelpID = _R(IDS_ROTATETRANS_STATUS1); StatusHelpID2 = _R(IDS_ROTATETRANS_STATUS2); CanScaleLines = FALSE; } /******************************************************************************************** > void OpRotateTrans::InitTransformImmediate(OpParam* pOpParam) Author: Rik_Heywood (Xara Group Ltd) Created: 27/7/94 Inputs: pOpParam - The parameters that were passed into the operation Purpose: Sets up the transform ready for an immediate rotation. This is called from DoWithParam() SeeAlso: TransOperation::DoWithParam() ********************************************************************************************/ void OpRotateTrans::InitTransformImmediate(OpParam* pOpParam) { // Do a rotation right now StartAngle = (ANGLE)0; // Rotate by the number of degrees pointed to by Param2 CurrentAngle = * ((ANGLE*)( PVOID(pOpParam->Param2) ) ); IsConstrained = FALSE; } /******************************************************************************************** > ANGLE OpRotateTrans::AngleFromCoord(DocCoord Pos) Author: Rik_Heywood (Xara Group Ltd) Created: 20/01/94 Inputs: Pos - The coord to find the angle to Returns: the angle to the coord Scope: Private Purpose: Finds the angle from the centre of rotation that the coord is ********************************************************************************************/ ANGLE OpRotateTrans::AngleFromCoord(DocCoord Pos) { // find the difference between the centre of rotation and the point INT32 dx = Pos.x - CentreOfTrans.x; INT32 dy = Pos.y - CentreOfTrans.y; if ((dx==0) && (dy==0)) { // Oh no, the mouse is directly over the centre of rotation return StartAngle; } // go find the angle to the cursor position from the centre of rotation double Angle = atan2((double)dy, (double)dx); // convert it to degrees and return it Angle = (Angle/(2*PI)) * 360.0; return (ANGLE)(Angle); } /******************************************************************************************** > virtual BOOL OpRotateTrans::ShouldPointerBeOffset() Author: Rik_Heywood (Xara Group Ltd) Created: 13/9/94 Returns: FALSE Purpose: Tells the base class of the operation that we want our mouse coords to be left alone ********************************************************************************************/ BOOL OpRotateTrans::ShouldPointerBeOffset() { return FALSE; } /******************************************************************************************** > virtual void OpRotateTrans::InitTransformOnDrag(DocCoord PointerPos, ClickModifiers ClickMods) Author: Rik_Heywood (Xara Group Ltd) Created: 19/7/94 Inputs: PointerPos - The position of the mouse at the start of the drag ClickMods - the keyboard modifiers that were active at the start of the drag Purpose: Sets up the parameters needed to build the transform matrix at the start of the drag. This base class version of this function does nothing. ********************************************************************************************/ void OpRotateTrans::InitTransformOnDrag(DocCoord PointerPos, ClickModifiers ClickMods) { // Make sure that the angle is correctly set taking into account that the // start position may be in the same place as the Centre of Rotation (or along // one of its axis StartAngle = AngleFromCoord(PointerPos); // Work out the constrained start angle as well (just in case we need it) DocCoord ConstrainedCoord = PointerPos; DocView::ConstrainToAngle(CentreOfTrans, &ConstrainedCoord); ConstrainedStartAngle = AngleFromCoord(ConstrainedCoord); // Constrain the mouse position if required (45 degrees until we get a better system) if (ClickMods.Constrain) { CurrentAngle = ConstrainedStartAngle; IsConstrained = TRUE; } else { CurrentAngle = StartAngle; IsConstrained = FALSE; } } /******************************************************************************************** > virtual void OpRotateTrans::UpdateTransformOnDrag(DocCoord PointerPos, Spread*, ClickModifiers&) Author: Rik_Heywood (Xara Group Ltd) Created: 19/7/94 Inputs: PointerPos - The latest position of the mouse Spread - The spread the that mouse is over ClickModifiers - The click modifiers that were in place at this point on the drag Purpose: Does the calculations needed when the mouse moves to keep all the params needed to build the rotation matrix up to date. ********************************************************************************************/ void OpRotateTrans::UpdateTransformOnDrag(DocCoord PointerPos, Spread* pClickSpread, ClickModifiers& ClickMods) { // Make sure that the cursor does not wrap around at the edge of spreads if (pClickSpread != StartSpread) PointerPos = MakeRelativeToSpread(StartSpread, pClickSpread, PointerPos); // Calc the new angle, based on the new mouse position CurrentAngle = AngleFromCoord(PointerPos); // See if the constrain key is in use if (ClickMods.Constrain) { IsConstrained = TRUE; BoundingData.Rotation = CurrentAngle - ConstrainedStartAngle; } else { BoundingData.Rotation = CurrentAngle - StartAngle; IsConstrained = FALSE; } BoundingData.RotateChanged = TRUE; // See also UpdateTransformBoundingData function in this file. } /******************************************************************************************** > void OpRotateTrans::BuildMatrix() Author: Rik_Heywood (Xara Group Ltd) Created: 19/7/94 Purpose: Builds the transform matrix required to rotate the selection about the point CentreOfRot by the required number of degrees ********************************************************************************************/ void OpRotateTrans::BuildMatrix() { // Build a matrix to transform the objects at render time by the required offsets // First off, work out the angle to rotate by ANGLE RotateBy; if (IsConstrained) RotateBy = CurrentAngle - ConstrainedStartAngle; else RotateBy = CurrentAngle - StartAngle; // Translate to the origin Transform = Matrix(-CentreOfTrans.x, -CentreOfTrans.y); // Rotate by the angle Matrix RotateIt(RotateBy); // translate back again Matrix TransFromOrigin(CentreOfTrans.x, CentreOfTrans.y); // Combine the 3 of them into a single matrix Transform *= RotateIt; Transform *= TransFromOrigin; } /******************************************************************************************** > virtual void OpRotateTrans::ConstrainDrag(DocCoord* PointerPos) Author: Rik_Heywood (Xara Group Ltd) Created: 19/7/94 Inputs: PointerPos - The current position of the mouse that needs to be constrained Outputs: PointerPos - The position of the mouse after it has been constrained Purpose: Will constrain the mouse position to lie along rays from the centre of rotation at the constrain angle apart (45 degrees by default) ********************************************************************************************/ void OpRotateTrans::ConstrainDrag(DocCoord* PointerPos) { // Rotate want to use the constrain to angle variation of the constrain system DocView::ConstrainToAngle(CentreOfTrans, PointerPos); } /******************************************************************************************** > BOOL OpRotateTrans::Declare() Author: Rik_Heywood (Xara Group Ltd) Created: 5/7/93 Returns: TRUE if all went OK, False otherwise Purpose: Adds the operation to the list of all known operations ********************************************************************************************/ BOOL OpRotateTrans::Declare() { return (RegisterOpDescriptor( 0, _R(IDS_ROTATESPIN), CC_RUNTIME_CLASS(OpRotateTrans), OPTOKEN_ROTATE, TransOperation::GetState)); } /******************************************************************************************** > void OpRotateTrans::UpdateTransformBoundingData() Author: Phil_Martin (Xara Group Ltd) Created: 04/9/94 Purpose: Override the base class version of this fn to ensure that new bounds are calculated and placed in the BoundingData structure. ********************************************************************************************/ void OpRotateTrans::UpdateTransformBoundingData() { #ifndef STANDALONE ComputeNewBounds(); // Tell the tool about the current transform bounding data pSelTool->DragMove(&BoundingData); #endif }