ScreenCamView Class Reference

A subclass of CCamView which is the class actually used for screen display. More...

#include <scrcamvw.h>

Inheritance diagram for ScreenCamView:

List of all members.

Public Member Functions
virtual BOOL	IsScreenCamView ()
Protected Member Functions
virtual CCamCanvas *	CreateCanvas (wxView *v, wxMDIChildFrame *frame, const wxPoint &pos, const wxSize &size, long style)
bool	OnCreate (wxDocument *doc, long flags)
	Called upon receipt of a WM_CREATE message for the view window. Constructs MFC/C++ surrogates on the heap, then tries to link up with Windows by calling the base class function OnCreate() and the Create function for each of the child windows of ScreenView, any or all of which can fail. Calculates the size of a pixel and sets the appropriate fields in the ViewState. If this is a new view upon a new document the rest of the fields of the ViewState are filled by the default characteristics of the ScreenView. If the document is not new then the ScreenView assumes that the kernel has already set up the ViewState, and changes its size, position etc to fit.
void	OnSize (wxSizeEvent &event)
	Resizes and repositions all child windows to fit the new size of the ScreenView. Updates the ViewState object with the size and position of the view, in an OS-independent manner. Resets the scroller's page and line size, and forces an immediate redraw of all affected windows.
Classes
class	ScreenCamCanvas

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Detailed Description

A subclass of CCamView which is the class actually used for screen display.

Author:

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

Date:

19/01/95

See also:

CCamView; PrintCamView

Definition at line 133 of file scrcamvw.h.

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Member Function Documentation

virtual CCamCanvas* ScreenCamView::CreateCanvas (  wxView *  v, wxMDIChildFrame *  frame, const wxPoint &  pos, const wxSize &  size, long  style )  [inline, protected, virtual]

Reimplemented from ScreenView. Definition at line 157 of file scrcamvw.h. : Correct */ long style ) { return new ScreenCamCanvas( v, frame, pos, size, style ); }

virtual BOOL ScreenCamView::IsScreenCamView (   )  [inline, virtual]

Definition at line 166 of file scrcamvw.h. { return TRUE; }

bool ScreenCamView::OnCreate (  wxDocument *  doc, long  flags )  [protected, virtual]

Called upon receipt of a WM_CREATE message for the view window. Constructs MFC/C++ surrogates on the heap, then tries to link up with Windows by calling the base class function OnCreate() and the Create function for each of the child windows of ScreenView, any or all of which can fail. Calculates the size of a pixel and sets the appropriate fields in the ViewState. If this is a new view upon a new document the rest of the fields of the ViewState are filled by the default characteristics of the ScreenView. If the document is not new then the ScreenView assumes that the kernel has already set up the ViewState, and changes its size, position etc to fit. Author: Justin_Flude (Xara Group Ltd) <camelotdev@xara.com> Date: ages ago Parameters: A  long pointer to a Windows CREATESTRUCT object. [INPUTS] Calling  the base class handler may change the CREATESTRUCT pointed to . . . ? [OUTPUTS] Returns: 0 for success, -1 for failure. Errors: _R(IDE_CREATEVIEWFAILED) if either the C++ or Windows side of construction fails. Note that if the function does fail then MFC is responsible for tidying up afterwards. Scope: Protected See also: ScreenView::ScreenView(); ScreenView::Create() CView::OnCreate() Reimplemented from CCamView. Definition at line 218 of file scrcamvw.cpp. : Correct */ long flags ) { // Construct the (C++) child windows. PORTNOTE("other","ScreenCamView::OnCreate - Removed scroller / ruler usage") #ifndef EXCLUDE_FROM_XARALX RenderWindow = new CRenderWnd; HScrollBar = new CWinScroller(TRUE); VScrollBar = new CWinScroller(FALSE); Corner = new CScrollerCorner; // WEBSTER - markn 15/1/97 // No rulers in Webster #ifndef WEBSTER HRuler = new OILHorizontalRuler; VRuler = new OILVerticalRuler; OGadget = new OriginGadget; #endif //webster if (!RenderWindow || !HScrollBar || !VScrollBar || !Corner #ifndef WEBSTER ||!HRuler ||!VRuler ||!OGadget #endif //webster ) { Error::SetError(_R(IDE_CREATE_VIEW_FAILED), 0); InformError(); return -1; } #endif // Get base class to call CView functions, and get a document for this view. if( !CCamView::OnCreate( doc, flags ) ) // Something went wrong - pass error back. return false; PORTNOTE("other","ScreenCamView::OnCreate - Removed scroller usage") // Now get Windows to do its side of the construction. The stated sizes and // positions of the windows here will be changed very soon. #ifndef EXCLUDE_FROM_XARALX const CRect rcARect(-100,-100,-90,-90); if (!RenderWindow->Create("", "", 0, rcARect, this, 1) || !HScrollBar->Create(0, rcARect, this, 2) || !VScrollBar->Create(0, rcARect, this, 3) || !Corner->Create("", "", 0, rcARect, this, 4) // WEBSTER - markn 15/1/97 // No rulers in Webster #ifndef WEBSTER || !OGadget->Create(this) || !HRuler->Create(this) || !VRuler->Create(this) #endif //webster ) { Error::SetError(_R(IDE_CREATE_VIEW_FAILED), 0); InformError(); return -1; } #endif CreateNewDocView(); // WEBSTER - markn 15/1/97 // No rulers in Webster #ifndef WEBSTER // init the kernel rulers and establish pointer links to them PORTNOTE("other","ScreenCamView::OnCreate - Removed ruler usage") #ifndef EXCLUDE_FROM_XARALX RulerPair* pRulers=pDocView->GetpRulerPair(); pRulers->Init(pDocView,HRuler,VRuler,OGadget); HRuler->LinkToKernel(pRulers->GetpHorizontalRuler()); VRuler->LinkToKernel(pRulers->GetpVerticalRuler()); #endif #endif //webster ENSURE(pDocView != 0, "ScreenView::ScreenView can't get a new DocView!"); pDocView->ConnectToOilView(this); // find the last view so we can use some of it's settings to create the new // DocView * LastView = DocView::GetSelected(); // Link this and the DocView to the ViewState object. pDocView->SetViewState(Status); wxScreenDC dc; wxSize pixsize=OSRenderRegion::GetFixedDCPPI(dc); PORTNOTE("other","ScreenCamView::OnCreate - Removed scroller usage") #ifndef EXCLUDE_FROM_XARALX // Set the logical pixel size accordingly (measured in millipoints). Take the // opportunity to pass the values into the scrollers and the OIL -> Windows coordinate // transform system. HScrollBar->SetGranularity(72000L / pixwidth); VScrollBar->SetGranularity(72000L / pixheight); #endif // Tell DocView how big the pixel size is. FIXED16 PixelWidth = FIXED16(72000.0/pixsize.x); FIXED16 PixelHeight = FIXED16(72000.0/pixsize.y); ERROR3IF(PixelWidth != PixelHeight, "Luke says non-square pixels are not supported"); pDocView->SetPixelSize(PixelWidth, PixelHeight); // Make our DocView the current DocView pDocView->SetCurrent(); GetCanvas()->SetScrollRate(1,1); if (GetFrame()) GetFrame()->GetClientSize(&CurrentSize.width,&CurrentSize.height); // Now the scrollers have all their information, we can set their appearance. // Make sure that they are invisible until the rest of the frame is ready /* XLONG x1 = CurrentSize.GetWidth () * PixelWidth; XLONG x2 = CurrentSize.GetHeight() * PixelHeight; GetFrame()->SetScrollbar(wxHORIZONTAL,0,x1,Status->WorkAreaExtent.hi.x-Status->WorkAreaExtent.lo.x,false); GetFrame()->SetScrollbar( wxVERTICAL,0,x2,Status->WorkAreaExtent.hi.y-Status->WorkAreaExtent.lo.y,false); */ SetScrollerStyle(ScrollerStyle = PropScrollersOn); ShowScrollers(DefaultScrollersState); ShowRulers(DefaultRulersState); // Register for WM_DROPFILES messages // DragAcceptFiles(TRUE); // WEBSTER - markn 12/2/97 #if (_OLE_VER >= 0x200) // Register with OLE as a drop target. m_DropTarget.Register(this); #endif // now that the ScreenView (and hence DocView) is stable, broadcast a message to let everyone know BROADCAST_TO_ALL(DocViewMsg(pDocView,DocViewMsg::NEWANDSTABLE)); // ****************** BODGE ************************** // This code will tell windows to send us messages when // the joystick gets waggled about. // We should really release the joystick at some point later, // but it gets released automatically when this ScreenView is // destroyed, so it will do for now. // The messages get passed to 'OnJoystickMove' member of this // class. #ifdef WIN32 PORTNOTE("other","ScreenCamView::OnCreate - Removed joystick usage") #ifndef EXCLUDE_FROM_XARALX JOYINFO joyinfo; UINT32 wNumDevs, wDeviceID; BOOL bDev1Attached, bDev2Attached; // Are there any Joysticks available ? if((wNumDevs = joyGetNumDevs()) == 0) return 0; // Nope. // Are there One or Two of them ? bDev1Attached = joyGetPos(JOYSTICKID1,&joyinfo) != JOYERR_UNPLUGGED; bDev2Attached = wNumDevs == 2 && joyGetPos(JOYSTICKID2,&joyinfo) != JOYERR_UNPLUGGED; if(bDev1Attached || bDev2Attached) // Decide which joystick to use wDeviceID = bDev1Attached ? JOYSTICKID1 : JOYSTICKID2; else return 0; // Grab those Messages !! MMRESULT JoyResult = joySetCapture(m_hWnd, wDeviceID, NULL, TRUE); #endif #endif // ****************** BODGE ************************** // Return success! return true; }

void ScreenCamView::OnSize (  wxSizeEvent &  event  )  [protected]

Resizes and repositions all child windows to fit the new size of the ScreenView. Updates the ViewState object with the size and position of the view, in an OS-independent manner. Resets the scroller's page and line size, and forces an immediate redraw of all affected windows. Author: Justin_Flude (Xara Group Ltd) <camelotdev@xara.com> Date: ages ago Parameters: A  flag indicating whether the window is maximised, minimised [INPUTS] etc., the width and height of the ScreenView client area. -  [OUTPUTS] Returns: - Errors: - Scope: Protected See also: CScroller::CalcPosFromParentClient(); CScroller::SetPageSize(); CScroller::SetLineSize(); class CRendWnd; class CScrollerCorner; struct ViewState; DocView::ViewStateChanged() Reimplemented from ScreenView. Definition at line 420 of file scrcamvw.cpp. { // This is called early, so if pDocView is null do nothing if( NULL == pDocView ) return; SetCurrentStates(); Document* pCurDoc = Document::GetCurrent(); DocView* pCurView = DocView::GetCurrent(); // these lines are here to stop very strange things happening on exit under Win32s // when this fn gets called when it really shouldn't. I would like to really know // just what on earth os going on under Win32s but it iss something strange in message // handling as far as I can tell. wxSize size( event.GetSize() ); // Check for irrelevant or potty messages. if (size.x <= 0 || size.y <= 0) { // TRACEUSER( "JustinF", _T("Strange size msg in ScreenView::OnSize(0x%X, %d, %d)\n"), // nType, cx, cy); return; } // Handle OLE 2.0 in-place activation stuff. #if (_OLE_VER >= 0x200) if(GetDocument()) { COleClientItem* pActiveItem = GetDocument()->GetInPlaceActiveItem(this); if (pActiveItem) pActiveItem->SetItemRects(); } #endif if (Status->ScrollersVisible) { PORTNOTETRACE( "other", "ScreenCamView::OnSize - Removed scroller usage" ); #if !defined(EXCLUDE_FROM_XARALX) // Resize and reposition the proportional scrollers. wxRect hrect, vrect; HScrollBar->CalcPosFromParentClient(&hrect); UINT32 RulerWidth = OILRuler::GetWidth(); //if rulers are switched on the scroll bars are made // smaller to accomodate them if (Status->RulersVisible) hrect.left += RulerWidth; if (RULER_BORDERS) hrect.left-=2; HScrollBar->MoveWindow(&hrect, TRUE); VScrollBar->CalcPosFromParentClient(&vrect); if (Status->RulersVisible) vrect.top += RulerWidth; if (RULER_BORDERS) vrect.top-=2; VScrollBar->MoveWindow(&vrect, TRUE); // Reposition the corner window at the bottom-right. Corner->MoveWindow(vrect.left, hrect.top, vrect.Width(), hrect.Height()); // Resize/reposition the rendering window. CurrentSize.left = CurrentSize.top = 0; CurrentSize.right = cx - vrect.Width() + 1; CurrentSize.bottom = cy - hrect.Height() + 1; #endif } else { CurrentSize.x = CurrentSize.y = 0; CurrentSize.width = size.x; CurrentSize.height = size.y; } if (Status->RulersVisible) { PORTNOTETRACE( "other", "ScreenCamView::OnSize - Removed scroller / ruler usage" ); #if !defined(EXCLUDE_FROM_XARALX) wxRect hRect, vRect, oRect; HRuler->CalcPosFromParentClient(&hRect); HRuler->MoveWindow(&hRect, TRUE); HRuler->PositionLegend(); CurrentSize.top = 0 + hRect.Height() ; VRuler->CalcPosFromParentClient(&vRect); VRuler->MoveWindow(&vRect, TRUE); CurrentSize.left = 0 + vRect.Width(); OGadget->CalcPosFromParentClient(&oRect); OGadget->MoveWindow(&oRect, TRUE); if (RULER_BORDERS) { CurrentSize.top --; CurrentSize.left--; } #endif } PORTNOTE( "other", "ScreenCamView::OnSize - Removed RenderWindow usage -not sure if needed" ) #ifndef EXCLUDE_FROM_XARALX RenderWindow->MoveWindow(&CurrentSize, TRUE); #endif // Update the rest of the window placement information. UpdateViewPosition(); // Calculate the work area, page & line sizes etc etc. FIXED16 PixelWidth, PixelHeight; pDocView->GetPixelSize(&PixelWidth, &PixelHeight); PORTNOTE( "other", "ScreenCamView::OnSize - Removed scroller usage" ) #if !defined(EXCLUDE_FROM_XARALX) XLONG x1 = CurrentSize.GetWidth() * PixelWidth; XLONG x2 = CurrentSize.GetHeight() * PixelHeight; HScrollBar->SetPageSize(x1); VScrollBar->SetPageSize(x2); HScrollBar->SetLineSize(x1 / xlong(10) + xlong(1)); VScrollBar->SetLineSize(x2 / xlong(10) + xlong(1)); #endif SetWorkAreaExtent(Status->WorkAreaExtent, FALSE); // Make sure the scroll offsets are valid - if we resize the bottom of the window // when at the extreme bottom of the view, then the scroll offsets should be // changed - we use the scrollers' own integrity checks to do this automatically. // Don't do this until the setup flag is TRUE, so we don't overwrite scroll offsets // that have been reloaded. if (fSetupDone) { WorkCoord CurrScrollPos; GetScrollOffset(&CurrScrollPos); SetScrollOffset(CurrScrollPos, TRUE); } // Inform the associated DocView object that something has happened. pDocView->ViewStateChanged(); pCurDoc->SetCurrent(); pCurView->SetCurrent(); }

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

• wxOil/scrcamvw.h (r1785/r1282)
• wxOil/scrcamvw.cpp (r1785/r1282)

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