/////////////////////////////////////////////////////////////////////////////
-// Name: No names yet.
-// Purpose: Contrib. demo
+// Name: antiflickpl.cpp
+// Purpose: Double-buffering plugin class for reducing flickering.
// Author: Aleksandras Gluchovas (@Lithuania)
// Modified by:
// Created: 23/10/98
// RCS-ID: $Id$
// Copyright: (c) Aleksandras Gluchovas
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
-#ifdef __GNUG__
- #pragma implementation "antiflickpl.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
BEGIN_EVENT_TABLE( cbAntiflickerPlugin, cbPluginBase )
- EVT_PL_START_DRAW_IN_AREA ( cbAntiflickerPlugin::OnStartDrawInArea )
- EVT_PL_FINISH_DRAW_IN_AREA ( cbAntiflickerPlugin::OnFinishDrawInArea )
+ EVT_PL_START_DRAW_IN_AREA ( cbAntiflickerPlugin::OnStartDrawInArea )
+ EVT_PL_FINISH_DRAW_IN_AREA ( cbAntiflickerPlugin::OnFinishDrawInArea )
END_EVENT_TABLE()
// constructors
cbAntiflickerPlugin::cbAntiflickerPlugin(void)
- : mpLRUBufDc ( NULL ),
- mLRUArea ( -1,-1, -1,-1 )
+ : mpLRUBufDc ( NULL ),
+ mLRUArea ( -1,-1, -1,-1 )
{
- ++mRefCount;
+ ++mRefCount;
}
cbAntiflickerPlugin::cbAntiflickerPlugin( wxFrameLayout* pPanel, int paneMask )
- : cbPluginBase( pPanel, paneMask ),
- mpLRUBufDc ( NULL ),
- mLRUArea ( -1,-1, -1,-1 )
+ : cbPluginBase( pPanel, paneMask ),
+ mpLRUBufDc ( NULL ),
+ mLRUArea ( -1,-1, -1,-1 )
{
- ++mRefCount;
+ ++mRefCount;
}
cbAntiflickerPlugin::~cbAntiflickerPlugin()
{
- if ( --mRefCount == 0 )
- {
- if ( mpHorizBuf )
- {
- mpHorizBufDc->SelectObject( wxNullBitmap );
- delete mpHorizBuf;
- delete mpHorizBufDc;
- mpHorizBuf = 0;
- mpHorizBufDc = 0;
- }
-
- if ( mpVertBuf )
- {
- mpVertBufDc->SelectObject( wxNullBitmap );
- delete mpVertBuf;
- delete mpVertBufDc;
- mpVertBuf = 0;
- mpVertBufDc = 0;
- }
- }
+ if ( --mRefCount == 0 )
+ {
+ if ( mpHorizBuf )
+ {
+ mpHorizBufDc->SelectObject( wxNullBitmap );
+ delete mpHorizBuf;
+ delete mpHorizBufDc;
+ mpHorizBuf = 0;
+ mpHorizBufDc = 0;
+ }
+
+ if ( mpVertBuf )
+ {
+ mpVertBufDc->SelectObject( wxNullBitmap );
+ delete mpVertBuf;
+ delete mpVertBufDc;
+ mpVertBuf = 0;
+ mpVertBufDc = 0;
+ }
+ }
}
wxDC* cbAntiflickerPlugin::FindSuitableBuffer( const wxRect& forArea )
{
- if ( mpVertBuf )
- {
- if ( mpVertBuf->GetHeight() >= forArea.height &&
- mpVertBuf->GetWidth() >= forArea.width )
-
- return mpVertBufDc;
- }
- else
- if ( mpHorizBuf )
- {
- if ( mpHorizBuf->GetHeight() >= forArea.height &&
- mpHorizBuf->GetWidth() >= forArea.width )
-
- return mpHorizBufDc;
- }
-
- return 0;
+ if ( mpVertBuf )
+ {
+ if ( mpVertBuf->GetHeight() >= forArea.height &&
+ mpVertBuf->GetWidth() >= forArea.width )
+ return mpVertBufDc;
+ }
+ else
+ if ( mpHorizBuf )
+ {
+ if ( mpHorizBuf->GetHeight() >= forArea.height &&
+ mpHorizBuf->GetWidth() >= forArea.width )
+ return mpHorizBufDc;
+ }
+
+ return 0;
}
wxDC* cbAntiflickerPlugin::AllocNewBuffer( const wxRect& forArea )
{
- // TBD:: preallocate bit larger bitmap at once, to avoid
- // excessive realocations later
-
- // check whether the given area is oriented horizontally
- // or verticallya and choose correspoinding bitmap to create or
- // recreate
-
- if ( forArea.height > forArea.width )
- {
- wxSize prevDim( 0,0 );
-
- if ( mpVertBuf )
- {
- prevDim.x = mpVertBuf->GetWidth();
- prevDim.y = mpVertBuf->GetHeight();
-
- mpVertBufDc->SelectObject( wxNullBitmap );
- delete mpVertBuf;
- }
- else
- mpVertBufDc = new wxMemoryDC();
-
- mpVertBuf = new wxBitmap( int( wxMax(forArea.width, prevDim.x ) ),
- int( wxMax(forArea.height, prevDim.y ) )
- );
-
- mpVertBufDc->SelectObject( *mpVertBuf );
-
- return mpVertBufDc;
- }
- else
- {
- wxSize prevDim( 0,0 );
-
- if ( mpHorizBuf )
- {
- prevDim.x = mpHorizBuf->GetWidth();
- prevDim.y = mpHorizBuf->GetHeight();
-
- mpHorizBufDc->SelectObject( wxNullBitmap );
- delete mpHorizBuf;
- }
- else
- mpHorizBufDc = new wxMemoryDC();
-
- mpHorizBuf = new wxBitmap( int( wxMax(forArea.width, prevDim.x ) ),
- int( wxMax(forArea.height, prevDim.y ) )
- );
-
- mpHorizBufDc->SelectObject( *mpHorizBuf );
-
- return mpHorizBufDc;
- }
+ // TBD:: preallocate bit larger bitmap at once, to avoid
+ // excessive realocations later
+
+ // check whether the given area is oriented horizontally
+ // or vertically and choose corresponding bitmap to create or
+ // recreate
+
+ if ( forArea.height > forArea.width )
+ {
+ wxSize prevDim( 0,0 );
+
+ if ( mpVertBuf )
+ {
+ prevDim.x = mpVertBuf->GetWidth();
+ prevDim.y = mpVertBuf->GetHeight();
+
+ mpVertBufDc->SelectObject( wxNullBitmap );
+ delete mpVertBuf;
+ }
+ else
+ mpVertBufDc = new wxMemoryDC();
+
+ mpVertBuf = new wxBitmap( int( wxMax(forArea.width, prevDim.x ) ),
+ int( wxMax(forArea.height, prevDim.y ) )
+ );
+
+ mpVertBufDc->SelectObject( *mpVertBuf );
+
+ return mpVertBufDc;
+ }
+ else
+ {
+ wxSize prevDim( 0,0 );
+
+ if ( mpHorizBuf )
+ {
+ prevDim.x = mpHorizBuf->GetWidth();
+ prevDim.y = mpHorizBuf->GetHeight();
+
+ mpHorizBufDc->SelectObject( wxNullBitmap );
+ delete mpHorizBuf;
+ }
+ else
+ mpHorizBufDc = new wxMemoryDC();
+
+ mpHorizBuf = new wxBitmap( int( wxMax(forArea.width, prevDim.x ) ),
+ int( wxMax(forArea.height, prevDim.y ) )
+ );
+
+ mpHorizBufDc->SelectObject( *mpHorizBuf );
+
+ return mpHorizBufDc;
+ }
}
void cbAntiflickerPlugin::OnStartDrawInArea( cbStartDrawInAreaEvent& event )
{
- wxASSERT( mpLRUBufDc == NULL ); // DBG:: see comments in OnFinishDrawInArea(..) method
+ wxASSERT( mpLRUBufDc == NULL ); // DBG:: see comments in OnFinishDrawInArea(..) method
- // short-cut
- wxRect& area = event.mArea;
+ // short-cut
+ wxRect& area = event.mArea;
- if ( event.mArea.width < 0 ||
- event.mArea.height < 0 ) return;
+ if ( event.mArea.width < 0 ||
+ event.mArea.height < 0 ) return;
- // memorize given area
- mLRUArea.x = area.x;
- mLRUArea.y = area.y;
- mLRUArea.width = area.width;
- mLRUArea.height = area.height;
+ // memorize given area
+ mLRUArea.x = area.x;
+ mLRUArea.y = area.y;
+ mLRUArea.width = area.width;
+ mLRUArea.height = area.height;
- wxDC* pBufDc = FindSuitableBuffer( area );
+ wxDC* pBufDc = FindSuitableBuffer( area );
- if ( !pBufDc )
-
- pBufDc = AllocNewBuffer( area );
+ if ( !pBufDc )
+ pBufDc = AllocNewBuffer( area );
- pBufDc->SetDeviceOrigin( -area.x, -area.y );
+ pBufDc->SetDeviceOrigin( -area.x, -area.y );
- pBufDc->SetClippingRegion( area.x, area.y,
- area.width, area.height );
+ pBufDc->SetClippingRegion( area.x, area.y,
+ area.width, area.height );
- wxClientDC clntDc( &mpLayout->GetParentFrame() );
+ wxClientDC clntDc( &mpLayout->GetParentFrame() );
- (*event.mppDc) = pBufDc;
+ (*event.mppDc) = pBufDc;
- mpLRUBufDc = pBufDc; // memorize buffer, which will be flushed to screen
- // upon "commiting" the drawing
+ mpLRUBufDc = pBufDc; // memorize buffer, which will be flushed to screen
+ // upon "commiting" the drawing
- /*
- // OLD STUFF::
- mpLRUBufDc->Blit( pos.x, pos.y, size.x, size.y,
- &clntDc, pos.x, pos.y, wxCOPY );
- */
+ /*
+ // OLD STUFF::
+ mpLRUBufDc->Blit( pos.x, pos.y, size.x, size.y,
+ &clntDc, pos.x, pos.y, wxCOPY );
+ */
}
void cbAntiflickerPlugin::OnFinishDrawInArea( cbFinishDrawInAreaEvent& event )
{
- wxRect& area = event.mArea;
+ wxRect& area = event.mArea;
- if ( event.mArea.width < 0 ||
- event.mArea.height < 0 ) return;
+ if ( event.mArea.width < 0 ||
+ event.mArea.height < 0 ) return;
- wxASSERT( mpLRUBufDc ); // DBG:: OnStartDrawInArea should be called first
+ wxASSERT( mpLRUBufDc ); // DBG:: OnStartDrawInArea should be called first
- // FOR NOW:: OnStartDrawInArea(..) should be immediately followed
- // by OnFinishDrawInArea(..) for the same area
+ // FOR NOW:: OnStartDrawInArea(..) should be immediately followed
+ // by OnFinishDrawInArea(..) for the same area
- wxASSERT( mLRUArea.x == area.x );
- wxASSERT( mLRUArea.y == area.y );
- wxASSERT( mLRUArea.width == area.width );
- wxASSERT( mLRUArea.height == area.height );
+ wxASSERT( mLRUArea.x == area.x );
+ wxASSERT( mLRUArea.y == area.y );
+ wxASSERT( mLRUArea.width == area.width );
+ wxASSERT( mLRUArea.height == area.height );
- wxClientDC clntDc( &mpLayout->GetParentFrame() );
+ wxClientDC clntDc( &mpLayout->GetParentFrame() );
- // "commit" drawings in one-shot
- clntDc.Blit( area.x, area.y, area.width, area.height,
- mpLRUBufDc, area.x, area.y, wxCOPY );
+ // "commit" drawings in one-shot
+ clntDc.Blit( area.x, area.y, area.width, area.height,
+ mpLRUBufDc, area.x, area.y, wxCOPY );
- mpLRUBufDc->DestroyClippingRegion();
- mpLRUBufDc = 0;
+ mpLRUBufDc->DestroyClippingRegion();
+ mpLRUBufDc = 0;
}
projects / wxWidgets.git / blobdiff