Added wxCanvas prototype and sample
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8205 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
324
contrib/src/canvas/canvas.cpp
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324
contrib/src/canvas/canvas.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: canvas.cpp
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// Author: Robert Roebling
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// Created: XX/XX/XX
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// Copyright: 2000 (c) Robert Roebling
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// Licence: wxWindows Licence
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma implementation "canvas.cpp"
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#endif
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// For compilers that support precompilation, includes "wx/wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#include "wx/canvas/canvas.h"
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#ifdef __WXGTK__
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#include <gtk/gtk.h>
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#include <gdk/gdkrgb.h>
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#include "wx/gtk/win_gtk.h"
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#endif
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// WDR: class implementations
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//----------------------------------------------------------------------------
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// wxCanvasObject
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//----------------------------------------------------------------------------
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wxCanvasObject::wxCanvasObject( int x, int y, int width, int height )
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{
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m_owner = NULL;
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m_area.x = x;
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m_area.y = y;
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m_area.width = width;
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m_area.height = height;
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m_isControl = FALSE;
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m_isVector = FALSE;
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m_isImage = FALSE;
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}
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void wxCanvasObject::Move( int x, int y )
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{
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int old_x = m_area.x;
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int old_y = m_area.y;
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m_area.x = x;
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m_area.y = y;
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if (!m_isControl)
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{
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// TODO: sometimes faster to merge into 1 Update or
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// to break up into four
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m_owner->Update( old_x, old_y, m_area.width, m_area.height );
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m_owner->Update( x, y, m_area.width, m_area.height );
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}
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}
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void wxCanvasObject::WriteSVG( wxTextOutputStream &stream )
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{
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}
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void wxCanvasObject::Render( int clip_x, int clip_y, int clip_width, int clip_height )
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{
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}
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//----------------------------------------------------------------------------
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// wxCanvasImage
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//----------------------------------------------------------------------------
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wxCanvasImage::wxCanvasImage( const wxImage &image, int x, int y )
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: wxCanvasObject( x, y, image.GetWidth(), image.GetHeight() )
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{
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m_image = image;
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m_isImage = TRUE;
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}
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void wxCanvasImage::Render( int clip_x, int clip_y, int clip_width, int clip_height )
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{
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m_owner->GetBuffer()->Paste( m_image, m_area.x, m_area.y );
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}
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void wxCanvasImage::WriteSVG( wxTextOutputStream &stream )
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{
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// no idea
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}
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//----------------------------------------------------------------------------
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// wxCanvas
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//----------------------------------------------------------------------------
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IMPLEMENT_CLASS(wxCanvas,wxScrolledWindow)
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BEGIN_EVENT_TABLE(wxCanvas,wxScrolledWindow)
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EVT_CHAR( wxCanvas::OnChar )
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EVT_PAINT( wxCanvas::OnPaint )
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EVT_SIZE( wxCanvas::OnSize )
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EVT_IDLE( wxCanvas::OnIdle )
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EVT_MOUSE_EVENTS( wxCanvas::OnMouse )
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EVT_SET_FOCUS( wxCanvas::OnSetFocus )
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EVT_KILL_FOCUS( wxCanvas::OnKillFocus )
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END_EVENT_TABLE()
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wxCanvas::wxCanvas( wxWindow *parent, wxWindowID id,
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const wxPoint &position, const wxSize& size, long style ) :
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wxScrolledWindow( parent, id, position, size, style )
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{
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m_needUpdate = FALSE;
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m_objects.DeleteContents( TRUE );
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}
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wxCanvas::~wxCanvas()
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{
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wxNode *node = m_updateRects.First();
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while (node)
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{
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wxRect *rect = (wxRect*) node->Data();
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delete rect;
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m_updateRects.DeleteNode( node );
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node = m_updateRects.First();
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}
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}
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void wxCanvas::SetArea( int width, int height )
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{
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m_buffer = wxImage( width, height );
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SetScrollbars( 10, 10, width/10, height/10 );
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}
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void wxCanvas::Update( int x, int y, int width, int height )
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{
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m_needUpdate = TRUE;
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m_updateRects.Append(
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(wxObject*) new wxRect( x,y,width,height ) );
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// speed up with direct access
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int xx,yy,ww,hh;
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for (yy = y; yy < y+height; yy++)
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for (xx = x; xx < x+width; xx++)
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m_buffer.SetRGB( xx, yy, 0, 0, 0 );
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wxNode *node = m_objects.First();
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while (node)
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{
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wxCanvasObject *obj = (wxCanvasObject*) node->Data();
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xx = obj->GetX();
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yy = obj->GetY();
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ww = obj->GetWidth();
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hh = obj->GetHeight();
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// if intersect
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{
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obj->Render( x, y, width, height );
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}
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node = node->Next();
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}
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}
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void wxCanvas::UpdateNow()
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{
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if (!m_needUpdate) return;
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wxClientDC dc( this );
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PrepareDC( dc );
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wxNode *node = m_updateRects.First();
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while (node)
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{
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wxRect *rect = (wxRect*) node->Data();
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wxImage sub_image( m_buffer.GetSubImage( *rect ) );
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// DirectDraw here, please
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#ifdef __WXGTK__
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int bpp = wxDisplayDepth();
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if (bpp > 8)
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{
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// the init code is doubled in wxImage
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static bool s_hasInitialized = FALSE;
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if (!s_hasInitialized)
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{
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gdk_rgb_init();
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s_hasInitialized = TRUE;
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}
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int x = rect->x;
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int y = rect->y;
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CalcScrolledPosition( x, y, &x, &y );
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gdk_draw_rgb_image( GTK_PIZZA(m_wxwindow)->bin_window,
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m_wxwindow->style->black_gc,
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x, y,
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sub_image.GetWidth(), sub_image.GetHeight(),
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GDK_RGB_DITHER_NONE,
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sub_image.GetData(),
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sub_image.GetWidth()*3 );
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}
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else
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{
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wxBitmap bitmap( sub_image.ConvertToBitmap() );
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dc.DrawBitmap( bitmap, rect->x, rect->y );
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}
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#endif
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#ifndef __WXGTK__
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wxBitmap bitmap( sub_image.ConvertToBitmap() );
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dc.DrawBitmap( bitmap, rect->x, rect->y );
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#endif
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delete rect;
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m_updateRects.DeleteNode( node );
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node = m_updateRects.First();
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}
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}
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void wxCanvas::Prepend( wxCanvasObject* obj )
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{
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m_objects.Insert( obj );
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obj->SetOwner( this );
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if (!obj->IsControl())
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Update( obj->GetX(), obj->GetY(), obj->GetWidth(), obj->GetHeight() );
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}
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void wxCanvas::Append( wxCanvasObject* obj )
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{
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m_objects.Append( obj );
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obj->SetOwner( this );
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if (!obj->IsControl())
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Update( obj->GetX(), obj->GetY(), obj->GetWidth(), obj->GetHeight() );
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}
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void wxCanvas::Insert( size_t before, wxCanvasObject* obj )
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{
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m_objects.Insert( before, obj );
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obj->SetOwner( this );
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if (!obj->IsControl())
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Update( obj->GetX(), obj->GetY(), obj->GetWidth(), obj->GetHeight() );
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}
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void wxCanvas::Remove( wxCanvasObject* obj )
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{
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int x = obj->GetX();
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int y = obj->GetY();
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int w = obj->GetWidth();
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int h = obj->GetHeight();
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bool ic = obj->IsControl();
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m_objects.DeleteObject( obj );
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if (!ic)
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Update( x, y, w, h );
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}
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void wxCanvas::OnPaint(wxPaintEvent &event)
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{
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#ifdef __WXMSW__
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wxPaintDC dc(this);
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#endif
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m_needUpdate = TRUE;
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wxRegionIterator it( GetUpdateRegion() );
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while (it)
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{
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int x = it.GetX();
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int y = it.GetY();
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CalcUnscrolledPosition( x, y, &x, &y );
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int w = it.GetWidth();
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int h = it.GetHeight();
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if (x + w > m_buffer.GetWidth())
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w = m_buffer.GetWidth()-x;
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if (y + h > m_buffer.GetHeight())
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h = m_buffer.GetHeight()-y;
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m_updateRects.Append( (wxObject*) new wxRect( x, y, w, h ) );
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it++;
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}
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}
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void wxCanvas::OnMouse(wxMouseEvent &event)
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{
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// Propagate to objects here
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}
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void wxCanvas::OnSize(wxSizeEvent &event)
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{
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event.Skip();
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}
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void wxCanvas::OnIdle(wxIdleEvent &event)
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{
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UpdateNow();
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event.Skip();
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}
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void wxCanvas::OnSetFocus(wxFocusEvent &event)
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{
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}
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void wxCanvas::OnKillFocus(wxFocusEvent &event)
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{
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}
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void wxCanvas::OnChar(wxKeyEvent &event)
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{
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event.Skip();
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}
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