// Purpose: wxGTK implementation of wxNonOwnedWindow.
// Author: Vadim Zeitlin
// Created: 2011-10-12
-// RCS-ID: $Id: wxhead.cpp,v 1.11 2010-04-22 12:44:51 zeitlin Exp $
+// RCS-ID: $Id$
// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#endif
#ifndef WX_PRECOMP
- #include "wx/string.h"
+ #include "wx/nonownedwnd.h"
+ #include "wx/dcclient.h"
+ #include "wx/dcmemory.h"
+ #include "wx/region.h"
#endif // WX_PRECOMP
-#include "wx/gtk/private.h"
+#include "wx/graphics.h"
-#include <gdk/gdk.h>
+#include <gtk/gtk.h>
+#include "wx/gtk/private/gtk2-compat.h"
-namespace
+// ----------------------------------------------------------------------------
+// wxNonOwnedWindowShapeImpl: base class for region and path-based classes.
+// ----------------------------------------------------------------------------
+
+// This class provides behaviour common to both region and path-based
+// implementations and defines SetShape() method and virtual dtor that can be
+// called by wxNonOwnedWindow when it's realized leaving just the
+// implementation of DoSetShape() to the derived classes.
+class wxNonOwnedWindowShapeImpl : public wxEvtHandler
{
+public:
+ wxNonOwnedWindowShapeImpl(wxWindow* win) : m_win(win)
+ {
+ }
+
+ virtual ~wxNonOwnedWindowShapeImpl() { }
-// helper
-bool do_shape_combine_region(GdkWindow* window, const wxRegion& region)
+ bool SetShape()
+ {
+ if ( m_win->m_wxwindow )
+ SetShapeIfNonNull(gtk_widget_get_window(m_win->m_wxwindow));
+
+ return SetShapeIfNonNull(gtk_widget_get_window(m_win->m_widget));
+ }
+
+ // Must be overridden to indicate if the data object must stay around or if
+ // it can be deleted once SetShape() was called.
+ virtual bool CanBeDeleted() const = 0;
+
+protected:
+ wxWindow* const m_win;
+
+private:
+ // SetShape to the given GDK window by calling DoSetShape() if it's non-NULL.
+ bool SetShapeIfNonNull(GdkWindow* window)
+ {
+ return window && DoSetShape(window);
+ }
+
+ // SetShape the shape to the given GDK window which can be either the window
+ // of m_widget or m_wxwindow of the wxWindow we're used with.
+ virtual bool DoSetShape(GdkWindow* window) = 0;
+
+ wxDECLARE_NO_COPY_CLASS(wxNonOwnedWindowShapeImpl);
+};
+
+// Version not using any custom shape.
+class wxNonOwnedWindowShapeImplNone : public wxNonOwnedWindowShapeImpl
{
- if (window)
+public:
+ wxNonOwnedWindowShapeImplNone(wxWindow* win) :
+ wxNonOwnedWindowShapeImpl(win)
{
- if (region.IsEmpty())
- {
- gdk_window_shape_combine_mask(window, NULL, 0, 0);
- }
- else
- {
- gdk_window_shape_combine_region(window, region.GetRegion(), 0, 0);
- return true;
- }
}
- return false;
-}
-} // anonymous namespace
+ virtual bool CanBeDeleted() const { return true; }
+
+private:
+ virtual bool DoSetShape(GdkWindow* window)
+ {
+ gdk_window_shape_combine_region(window, NULL, 0, 0);
+
+ return true;
+ }
+};
+
+// Version using simple wxRegion.
+class wxNonOwnedWindowShapeImplRegion : public wxNonOwnedWindowShapeImpl
+{
+public:
+ wxNonOwnedWindowShapeImplRegion(wxWindow* win, const wxRegion& region) :
+ wxNonOwnedWindowShapeImpl(win),
+ m_region(region)
+ {
+ }
+
+ virtual bool CanBeDeleted() const { return true; }
+
+private:
+ virtual bool DoSetShape(GdkWindow* window)
+ {
+ gdk_window_shape_combine_region(window, m_region.GetRegion(), 0, 0);
+
+ return true;
+ }
+
+ wxRegion m_region;
+};
+
+#if wxUSE_GRAPHICS_CONTEXT
+
+// Version using more complex wxGraphicsPath.
+class wxNonOwnedWindowShapeImplPath : public wxNonOwnedWindowShapeImpl
+{
+public:
+ wxNonOwnedWindowShapeImplPath(wxWindow* win, const wxGraphicsPath& path) :
+ wxNonOwnedWindowShapeImpl(win),
+ m_path(path),
+ m_mask(CreateShapeBitmap(path), *wxBLACK)
+ {
+
+ m_win->Connect
+ (
+ wxEVT_PAINT,
+ wxPaintEventHandler(wxNonOwnedWindowShapeImplPath::OnPaint),
+ NULL,
+ this
+ );
+ }
+
+ virtual ~wxNonOwnedWindowShapeImplPath()
+ {
+ m_win->Disconnect
+ (
+ wxEVT_PAINT,
+ wxPaintEventHandler(wxNonOwnedWindowShapeImplPath::OnPaint),
+ NULL,
+ this
+ );
+ }
+
+ // Currently we always return false from here, if drawing the border
+ // becomes optional, we could return true if we don't need to draw it.
+ virtual bool CanBeDeleted() const { return false; }
+
+private:
+ wxBitmap CreateShapeBitmap(const wxGraphicsPath& path)
+ {
+ // Draw the path on a bitmap to get the mask we need.
+ //
+ // Notice that using monochrome bitmap here doesn't work because of an
+ // apparent wxGraphicsContext bug in wxGTK, so use a bitmap of screen
+ // depth even if this is wasteful.
+ wxBitmap bmp(m_win->GetSize());
+ wxMemoryDC dc(bmp);
+
+ dc.SetBackground(*wxBLACK);
+ dc.Clear();
+
+#ifdef __WXGTK3__
+ wxGraphicsContext* context = dc.GetGraphicsContext();
+#else
+ wxScopedPtr<wxGraphicsContext> context(wxGraphicsContext::Create(dc));
+#endif
+ context->SetBrush(*wxWHITE);
+ context->FillPath(path);
+
+ return bmp;
+ }
+
+ virtual bool DoSetShape(GdkWindow *window)
+ {
+ if (!m_mask)
+ return false;
+
+#ifdef __WXGTK3__
+ cairo_region_t* region = gdk_cairo_region_create_from_surface(m_mask);
+ gdk_window_shape_combine_region(window, region, 0, 0);
+ cairo_region_destroy(region);
+#else
+ gdk_window_shape_combine_mask(window, m_mask, 0, 0);
+#endif
+
+ return true;
+ }
+
+ // Draw a shaped window border.
+ void OnPaint(wxPaintEvent& event)
+ {
+ event.Skip();
+
+ wxPaintDC dc(m_win);
+#ifdef __WXGTK3__
+ wxGraphicsContext* context = dc.GetGraphicsContext();
+#else
+ wxScopedPtr<wxGraphicsContext> context(wxGraphicsContext::Create(dc));
+#endif
+ context->SetPen(wxPen(*wxLIGHT_GREY, 2));
+ context->StrokePath(m_path);
+ }
+
+ wxGraphicsPath m_path;
+ wxMask m_mask;
+};
+
+#endif // wxUSE_GRAPHICS_CONTEXT
// ============================================================================
// wxNonOwnedWindow implementation
// ============================================================================
+wxNonOwnedWindow::~wxNonOwnedWindow()
+{
+ delete m_shapeImpl;
+}
+
void wxNonOwnedWindow::GTKHandleRealized()
{
wxNonOwnedWindowBase::GTKHandleRealized();
- if (HasFlag(wxFRAME_SHAPED))
- SetShape(m_shape);
+ if ( m_shapeImpl )
+ {
+ m_shapeImpl->SetShape();
+
+ // We can destroy wxNonOwnedWindowShapeImplRegion immediately but need
+ // to keep wxNonOwnedWindowShapeImplPath around as it draws the border
+ // on every repaint.
+ if ( m_shapeImpl->CanBeDeleted() )
+ {
+ delete m_shapeImpl;
+ m_shapeImpl = NULL;
+ }
+ }
}
-bool wxNonOwnedWindow::SetShape(const wxRegion& region)
+bool wxNonOwnedWindow::DoClearShape()
{
- wxCHECK_MSG( HasFlag(wxFRAME_SHAPED), false,
- wxT("Shaped windows must be created with the wxFRAME_SHAPED style."));
+ if ( !m_shapeImpl )
+ {
+ // Nothing to do, we don't have any custom shape.
+ return true;
+ }
if ( gtk_widget_get_realized(m_widget) )
{
- if ( m_wxwindow )
- do_shape_combine_region(gtk_widget_get_window(m_wxwindow), region);
+ // Reset the existing shape immediately.
+ wxNonOwnedWindowShapeImplNone data(this);
+ data.SetShape();
+ }
+ //else: just do nothing, deleting m_shapeImpl is enough to ensure that we
+ // don't set the custom shape later when we're realized.
- return do_shape_combine_region(gtk_widget_get_window(m_widget), region);
+ delete m_shapeImpl;
+ m_shapeImpl = NULL;
+
+ return true;
+}
+
+bool wxNonOwnedWindow::DoSetRegionShape(const wxRegion& region)
+{
+ // In any case get rid of the old data.
+ delete m_shapeImpl;
+ m_shapeImpl = NULL;
+
+ if ( gtk_widget_get_realized(m_widget) )
+ {
+ // We can avoid an unnecessary heap allocation and just set the shape
+ // immediately.
+ wxNonOwnedWindowShapeImplRegion data(this, region);
+ return data.SetShape();
}
- else // not realized yet
+ else // Create an object that will set shape when we're realized.
{
- // store the shape to set, it will be really set once we're realized
- m_shape = region;
+ m_shapeImpl = new wxNonOwnedWindowShapeImplRegion(this, region);
- // we don't know if we're going to succeed or fail, be optimistic by
- // default
+ // In general we don't know whether we are going to succeed or not, so
+ // be optimistic.
return true;
}
}
+
+#if wxUSE_GRAPHICS_CONTEXT
+
+bool wxNonOwnedWindow::DoSetPathShape(const wxGraphicsPath& path)
+{
+ // The logic here is simpler than above because we always create
+ // wxNonOwnedWindowShapeImplPath on the heap as we must keep it around,
+ // even if we're already realized
+
+ delete m_shapeImpl;
+ m_shapeImpl = new wxNonOwnedWindowShapeImplPath(this, path);
+
+ if ( gtk_widget_get_realized(m_widget) )
+ {
+ return m_shapeImpl->SetShape();
+ }
+ //else: will be done later from GTKHandleRealized().
+
+ return true;
+}
+
+#endif // wxUSE_GRAPHICS_CONTEXT
projects / wxWidgets.git / blobdiff