+///////////////////////////////////////////////////////////////////////////////
+// Name: wx/bannerwindow.h
+// Purpose: wxBannerWindow class implementation
+// Author: Vadim Zeitlin
+// Created: 2011-08-16
+// RCS-ID: $Id$
+// Copyright: (c) 2011 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence: wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+ #pragma hdrstop
+#endif
+
+#if wxUSE_BANNERWINDOW
+
+#include "wx/bannerwindow.h"
+
+#ifndef WX_PRECOMP
+ #include "wx/bitmap.h"
+ #include "wx/colour.h"
+#endif
+
+#include "wx/dcbuffer.h"
+
+namespace
+{
+
+// Some constants for banner layout, currently they're hard coded but we could
+// easily make them configurable if needed later.
+const int MARGIN_X = 5;
+const int MARGIN_Y = 5;
+
+} // anonymous namespace
+
+extern WXDLLEXPORT_DATA(const char) wxBannerWindowNameStr[] = "bannerwindow";
+
+BEGIN_EVENT_TABLE(wxBannerWindow, wxWindow)
+ EVT_SIZE(wxBannerWindow::OnSize)
+ EVT_PAINT(wxBannerWindow::OnPaint)
+END_EVENT_TABLE()
+
+void wxBannerWindow::Init()
+{
+ m_direction = wxLEFT;
+
+ m_colStart = *wxWHITE;
+ m_colEnd = *wxBLUE;
+}
+
+bool
+wxBannerWindow::Create(wxWindow* parent,
+ wxWindowID winid,
+ wxDirection dir,
+ const wxPoint& pos,
+ const wxSize& size,
+ long style,
+ const wxString& name)
+{
+ if ( !wxWindow::Create(parent, winid, pos, size, style, name) )
+ return false;
+
+ wxASSERT_MSG
+ (
+ dir == wxLEFT || dir == wxRIGHT || dir == wxTOP || dir == wxBOTTOM,
+ wxS("Invalid banner direction")
+ );
+
+ m_direction = dir;
+
+ SetBackgroundStyle(wxBG_STYLE_PAINT);
+
+ return true;
+}
+
+void wxBannerWindow::SetBitmap(const wxBitmap& bmp)
+{
+ m_bitmap = bmp;
+
+ InvalidateBestSize();
+
+ Refresh();
+}
+
+void wxBannerWindow::SetText(const wxString& title, const wxString& message)
+{
+ m_title = title;
+ m_message = message;
+
+ InvalidateBestSize();
+
+ Refresh();
+}
+
+void wxBannerWindow::SetGradient(const wxColour& start, const wxColour& end)
+{
+ m_colStart = start;
+ m_colEnd = end;
+
+ Refresh();
+}
+
+wxFont wxBannerWindow::GetTitleFont() const
+{
+ wxFont font = GetFont();
+ font.MakeBold().MakeLarger();
+ return font;
+}
+
+wxSize wxBannerWindow::DoGetBestClientSize() const
+{
+ if ( m_bitmap.IsOk() )
+ {
+ return m_bitmap.GetSize();
+ }
+ else
+ {
+ wxClientDC dc(const_cast<wxBannerWindow *>(this));
+ const wxSize sizeText = dc.GetMultiLineTextExtent(m_message);
+
+ dc.SetFont(GetTitleFont());
+
+ const wxSize sizeTitle = dc.GetTextExtent(m_title);
+
+ wxSize sizeWin(wxMax(sizeTitle.x, sizeText.x), sizeTitle.y + sizeText.y);
+
+ // If we draw the text vertically width and height are swapped.
+ if ( m_direction == wxLEFT || m_direction == wxRIGHT )
+ wxSwap(sizeWin.x, sizeWin.y);
+
+ sizeWin += 2*wxSize(MARGIN_X, MARGIN_Y);
+
+ return sizeWin;
+ }
+}
+
+void wxBannerWindow::OnSize(wxSizeEvent& event)
+{
+ Refresh();
+
+ event.Skip();
+}
+
+void wxBannerWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
+{
+ if ( m_bitmap.IsOk() && m_title.empty() && m_message.empty() )
+ {
+ // No need for buffering in this case.
+ wxPaintDC dc(this);
+
+ DrawBitmapBackground(dc);
+ }
+ else // We need to compose our contents ourselves.
+ {
+ wxAutoBufferedPaintDC dc(this);
+
+ // Deal with the background first.
+ if ( m_bitmap.IsOk() )
+ {
+ DrawBitmapBackground(dc);
+ }
+ else // Draw gradient background.
+ {
+ wxDirection gradientDir;
+ if ( m_direction == wxLEFT )
+ {
+ gradientDir = wxTOP;
+ }
+ else if ( m_direction == wxRIGHT )
+ {
+ gradientDir = wxBOTTOM;
+ }
+ else // For both wxTOP and wxBOTTOM.
+ {
+ gradientDir = wxRIGHT;
+ }
+
+ dc.GradientFillLinear(GetClientRect(), m_colStart, m_colEnd,
+ gradientDir);
+ }
+
+ // Now draw the text on top of it.
+ dc.SetFont(GetTitleFont());
+
+ wxPoint pos(MARGIN_X, MARGIN_Y);
+ DrawBannerTextLine(dc, m_title, pos);
+ pos.y += dc.GetTextExtent(m_title).y;
+
+ dc.SetFont(GetFont());
+
+ wxArrayString lines = wxSplit(m_message, '\n', '\0');
+ const unsigned numLines = lines.size();
+ for ( unsigned n = 0; n < numLines; n++ )
+ {
+ const wxString& line = lines[n];
+
+ DrawBannerTextLine(dc, line, pos);
+ pos.y += dc.GetTextExtent(line).y;
+ }
+ }
+}
+
+void wxBannerWindow::DrawBitmapBackground(wxDC& dc)
+{
+ switch ( m_direction )
+ {
+ case wxTOP:
+ case wxBOTTOM:
+ case wxRIGHT:
+ // Draw the bitmap normally, its rightmost or bottom part could be
+ // truncated, as it's meant to be.
+ dc.DrawBitmap(m_bitmap, 0, 0);
+ break;
+
+ case wxLEFT:
+ // The top most part of the bitmap may be truncated but its bottom
+ // must be always visible so intentionally draw it possibly partly
+ // outside of the window.
+ dc.DrawBitmap(m_bitmap,
+ 0, GetClientSize().y - m_bitmap.GetHeight());
+ break;
+
+ // This case is there only to prevent g++ warnings about not handling
+ // some enum elements in the switch, it can't really happen.
+ case wxALL:
+ wxFAIL_MSG( wxS("Unreachable") );
+ }
+}
+
+void
+wxBannerWindow::DrawBannerTextLine(wxDC& dc,
+ const wxString& str,
+ const wxPoint& pos)
+{
+ switch ( m_direction )
+ {
+ case wxTOP:
+ case wxBOTTOM:
+ // The simple case: we just draw the text normally.
+ dc.DrawText(str, pos);
+ break;
+
+ case wxLEFT:
+ // We draw the text vertically and start from the lower left
+ // corner and not the upper left one as usual.
+ dc.DrawRotatedText(str, pos.y, GetClientSize().y - pos.x, 90);
+ break;
+
+ case wxRIGHT:
+ // We also draw the text vertically but now we start from the upper
+ // right corner and draw it from top to bottom.
+ dc.DrawRotatedText(str, GetClientSize().x - pos.y, pos.x, -90);
+ break;
+
+ case wxALL:
+ wxFAIL_MSG( wxS("Unreachable") );
+ }
+}
+
+#endif // wxUSE_BANNERWINDOW
projects / wxWidgets.git / commitdiff
