58c7e6d54f
This allows a bitmap to scale with the size of the wxStaticBitmap control. Scaling can be controlled to fill the control with or without changing the bitmaps aspect ratio.
104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: src/generic/statbmpg.cpp
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// Purpose: wxGenericStaticBitmap
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// Author: Marcin Wojdyr, Stefan Csomor
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// Created: 2008-06-16
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// Copyright: wxWidgets developers
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#include "wx/wxprec.h"
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#if wxUSE_STATBMP
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#ifndef WX_PRECOMP
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#include "wx/dcclient.h"
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#endif
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#include "wx/generic/statbmpg.h"
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#if wxUSE_GRAPHICS_CONTEXT
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#include "wx/graphics.h"
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#include "wx/scopedptr.h"
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#else
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#include "wx/image.h"
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#include "wx/math.h"
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#endif
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bool wxGenericStaticBitmap::Create(wxWindow *parent, wxWindowID id,
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const wxBitmap& bitmap,
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const wxPoint& pos, const wxSize& size,
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long style, const wxString& name)
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{
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if (! wxControl::Create(parent, id, pos, size, style,
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wxDefaultValidator, name))
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return false;
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m_scaleMode = Scale_None;
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SetBitmap(bitmap);
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Connect(wxEVT_PAINT, wxPaintEventHandler(wxGenericStaticBitmap::OnPaint));
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return true;
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}
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void wxGenericStaticBitmap::OnPaint(wxPaintEvent& WXUNUSED(event))
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{
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if ( !m_bitmap.IsOk() )
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return;
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wxPaintDC dc(this);
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const wxSize drawSize = GetClientSize();
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const wxSize bmpSize = m_bitmap.GetSize();
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wxDouble w = 0;
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wxDouble h = 0;
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switch ( m_scaleMode )
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{
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case Scale_None:
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dc.DrawBitmap(m_bitmap, 0, 0, true);
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return;
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case Scale_Fill:
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w = drawSize.x;
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h = drawSize.y;
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break;
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case Scale_AspectFill:
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case Scale_AspectFit:
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{
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wxDouble scaleFactor;
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wxDouble scaleX = (wxDouble)drawSize.x / (wxDouble)bmpSize.x;
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wxDouble scaleY = (wxDouble)drawSize.y / (wxDouble)bmpSize.y;
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if ( ( m_scaleMode == Scale_AspectFit && scaleY < scaleX ) ||
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( m_scaleMode == Scale_AspectFill && scaleY > scaleX ) )
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scaleFactor = scaleY;
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else
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scaleFactor = scaleX;
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w = bmpSize.x * scaleFactor;
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h = bmpSize.y * scaleFactor;
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break;
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}
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}
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wxASSERT_MSG(w, wxS("Unknown scale mode"));
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wxDouble x = (drawSize.x - w) / 2;
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wxDouble y = (drawSize.y - h) / 2;
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#if wxUSE_GRAPHICS_CONTEXT
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wxScopedPtr<wxGraphicsContext> const
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gc(wxGraphicsRenderer::GetDefaultRenderer()->CreateContext(dc));
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gc->DrawBitmap(m_bitmap, x, y, w, h);
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#else
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wxImage img = m_bitmap.ConvertToImage();
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img.Rescale(wxRound(w), wxRound(h), wxIMAGE_QUALITY_HIGH);
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dc.DrawBitmap(wxBitmap(img), wxRound(x), wxRound(y), true);
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#endif
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}
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// under OSX_cocoa is a define, avoid duplicate info
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#ifndef wxGenericStaticBitmap
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wxIMPLEMENT_DYNAMIC_CLASS(wxGenericStaticBitmap, wxStaticBitmapBase);
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#endif
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#endif // wxUSE_STATBMP
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