#include "wx/html/htmlcell.h"
#include "wx/html/winpars.h"
+// this hack forces the linker to always link in m_* files
+#include "wx/html/forcelnk.h"
+FORCE_WXHTML_MODULES()
+
// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------
// this class is used by wxHtmlListBox to cache the parsed representation of
// the items to avoid doing it anew each time an item must be drawn
-//
-// TODO: extend the class to cache more than item
class wxHtmlListBoxCache
{
public:
- wxHtmlListBoxCache() { m_cell = NULL; }
- ~wxHtmlListBoxCache() { delete m_cell; }
+ wxHtmlListBoxCache()
+ {
+ for ( size_t n = 0; n < SIZE; n++ )
+ {
+ m_items[n] = (size_t)-1;
+ m_cells[n] = NULL;
+ }
- // returns true if we already have this item cached
- bool Has(size_t n) const { return m_cell && n == m_item; }
+ m_next = 0;
+ }
- // ensure that the item is cached
- void Store(size_t n, wxHtmlCell *cell)
+ ~wxHtmlListBoxCache()
{
- m_item = n;
+ for ( size_t n = 0; n < SIZE; n++ )
+ {
+ delete m_cells[n];
+ }
+ }
- delete m_cell;
- m_cell = cell;
+ // completely invalidate the cache
+ void Clear()
+ {
+ for ( size_t n = 0; n < SIZE; n++ )
+ {
+ m_items[n] = (size_t)-1;
+ delete m_cells[n];
+ m_cells[n] = NULL;
+ }
}
// return the cached cell for this index or NULL if none
- wxHtmlCell *Get(size_t n) const
+ wxHtmlCell *Get(size_t item) const
+ {
+ for ( size_t n = 0; n < SIZE; n++ )
+ {
+ if ( m_items[n] == item )
+ return m_cells[n];
+ }
+
+ return NULL;
+ }
+
+ // returns true if we already have this item cached
+ bool Has(size_t item) const { return Get(item) != NULL; }
+
+ // ensure that the item is cached
+ void Store(size_t item, wxHtmlCell *cell)
{
- // we could be reading uninitialized m_item here but the code is still
- // correct
- return n == m_item ? m_cell : NULL;
+ delete m_cells[m_next];
+ m_cells[m_next] = cell;
+ m_items[m_next] = item;
+
+ // advance to the next item wrapping around if there are no more
+ if ( ++m_next == SIZE )
+ m_next = 0;
}
private:
+ // the max number of the items we cache
+ enum { SIZE = 50 };
+
+ // the index of the LRU (oldest) cell
+ size_t m_next;
+
// the parsed representation of the cached item or NULL
- wxHtmlCell *m_cell;
+ wxHtmlCell *m_cells[SIZE];
- // the index of the currently cached item (only valid if m_cell != NULL)
- size_t m_item;
+ // the index of the currently cached item (only valid if m_cells != NULL)
+ size_t m_items[SIZE];
};
+// ----------------------------------------------------------------------------
+// event tables
+// ----------------------------------------------------------------------------
+
+BEGIN_EVENT_TABLE(wxHtmlListBox, wxVListBox)
+ EVT_SIZE(wxHtmlListBox::OnSize)
+END_EVENT_TABLE()
+
// ============================================================================
// implementation
// ============================================================================
return OnGetItem(n);
}
+// ----------------------------------------------------------------------------
+// wxHtmlListBox cache handling
+// ----------------------------------------------------------------------------
+
void wxHtmlListBox::CacheItem(size_t n) const
{
if ( !m_cache->Has(n) )
Parse(OnGetItemMarkup(n));
wxCHECK_RET( cell, _T("wxHtmlParser::Parse() returned NULL?") );
- cell->Layout(GetClientSize().x);
+ cell->Layout(GetClientSize().x - 2*GetMargins().x);
m_cache->Store(n, cell);
}
}
+void wxHtmlListBox::OnSize(wxSizeEvent& event)
+{
+ // we need to relayout all the cached cells
+ m_cache->Clear();
+
+ event.Skip();
+}
+
+void wxHtmlListBox::RefreshAll()
+{
+ m_cache->Clear();
+
+ wxVListBox::RefreshAll();
+}
+
// ----------------------------------------------------------------------------
// wxHtmlListBox implementation of wxVListBox pure virtuals
// ----------------------------------------------------------------------------
wxHtmlCell *cell = m_cache->Get(n);
wxCHECK_RET( cell, _T("this cell should be cached!") );
+ wxHtmlRenderingState htmlRendState;
+
// draw the selected cell in selected state
if ( IsSelected(n) )
{
wxHtmlSelection htmlSel;
htmlSel.Set(wxPoint(0, 0), cell, wxPoint(INT_MAX, INT_MAX), cell);
- wxHtmlRenderingState htmlRendState(&htmlSel);
+ htmlRendState.SetSelection(&htmlSel);
htmlRendState.SetSelectionState(wxHTML_SEL_IN);
- cell->Draw(dc, rect.x, rect.y, 0, INT_MAX, htmlRendState);
- }
- else
- {
- // note that we can't stop drawing exactly at the window boundary as then
- // even the visible cells part could be not drawn, so always draw the
- // entire cell
- wxHtmlRenderingState htmlRendState(NULL);
- cell->Draw(dc, rect.x, rect.y, 0, INT_MAX, htmlRendState);
}
+
+ // note that we can't stop drawing exactly at the window boundary as then
+ // even the visible cells part could be not drawn, so always draw the
+ // entire cell
+ cell->Draw(dc, rect.x, rect.y, 0, INT_MAX, htmlRendState);
}
wxCoord wxHtmlListBox::OnMeasureItem(size_t n) const
projects / wxWidgets.git / commitdiff
