+///////////////////////////////////////////////////////////////////////////////
+// Name: generic/vlbox.cpp
+// Purpose: implementation of wxVListBox
+// Author: Vadim Zeitlin
+// Modified by:
+// Created: 31.05.03
+// RCS-ID: $Id$
+// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwindows.org>
+// License: wxWindows license
+///////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+ #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+ #include "wx/settings.h"
+#endif //WX_PRECOMP
+
+#include "wx/vlbox.h"
+
+// ----------------------------------------------------------------------------
+// event tables
+// ----------------------------------------------------------------------------
+
+BEGIN_EVENT_TABLE(wxVListBox, wxVScrolledWindow)
+ EVT_PAINT(wxVListBox::OnPaint)
+
+ EVT_KEY_DOWN(wxVListBox::OnKeyDown)
+ EVT_LEFT_DOWN(wxVListBox::OnLeftDown)
+ EVT_LEFT_DCLICK(wxVListBox::OnLeftDClick)
+END_EVENT_TABLE()
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// wxVListBox creation
+// ----------------------------------------------------------------------------
+
+void wxVListBox::Init()
+{
+ m_selection = -1;
+}
+
+bool wxVListBox::Create(wxWindow *parent,
+ wxWindowID id,
+ const wxPoint& pos,
+ const wxSize& size,
+ size_t countItems,
+ long style,
+ const wxString& name)
+{
+ if ( !wxVScrolledWindow::Create(parent, id, pos, size, style, name) )
+ return false;
+
+ SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_LISTBOX));
+
+ SetItemCount(countItems);
+
+ return true;
+}
+
+// ----------------------------------------------------------------------------
+// selection handling
+// ----------------------------------------------------------------------------
+
+void wxVListBox::DoSetSelection(int selection, bool sendEvent)
+{
+ if ( selection == m_selection )
+ {
+ // nothing to do
+ return;
+ }
+
+ if ( m_selection != -1 )
+ RefreshLine(m_selection);
+
+ m_selection = selection;
+
+ if ( m_selection != -1 )
+ {
+ // if the line is not visible at all, we scroll it into view but we
+ // don't need to refresh it -- it will be redrawn anyhow
+ if ( !IsVisible(m_selection) )
+ {
+ ScrollToLine(m_selection);
+ }
+ else // line is at least partly visible
+ {
+ // it is, indeed, only partly visible, so scroll it into view to
+ // make it entirely visible
+ if ( (size_t)m_selection == GetLastVisibleLine() )
+ {
+ ScrollToLine(m_selection);
+ }
+
+ // but in any case refresh it as even if it was only partly visible
+ // before we need to redraw it entirely as its background changed
+ RefreshLine(m_selection);
+ }
+
+ // send a notification event if we were not called directly by user
+ if ( sendEvent )
+ {
+ wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, GetId());
+ event.SetEventObject(this);
+ event.m_commandInt = selection;
+
+ (void)GetEventHandler()->ProcessEvent(event);
+ }
+ }
+}
+
+// ----------------------------------------------------------------------------
+// wxVListBox painting
+// ----------------------------------------------------------------------------
+
+void wxVListBox::SetMargins(const wxPoint& pt)
+{
+ if ( pt != m_ptMargins )
+ {
+ m_ptMargins = pt;
+
+ Refresh();
+ }
+}
+
+wxCoord wxVListBox::OnGetLineHeight(size_t line) const
+{
+ return OnMeasureItem(line) + 2*m_ptMargins.y;
+}
+
+void wxVListBox::OnDrawSeparator(wxDC& WXUNUSED(dc),
+ wxRect& WXUNUSED(rect),
+ size_t WXUNUSED(n)) const
+{
+}
+
+void wxVListBox::OnPaint(wxPaintEvent& event)
+{
+ wxPaintDC dc(this);
+
+ // the update rectangle
+ wxRect rectUpdate = GetUpdateClientRect();
+
+ // the bounding rectangle of the current line
+ wxRect rectLine;
+ rectLine.width = GetClientSize().x;
+
+ // iterate over all visible lines
+ const size_t lineMax = GetLastVisibleLine();
+ for ( size_t line = GetFirstVisibleLine(); line <= lineMax; line++ )
+ {
+ const wxCoord hLine = OnGetLineHeight(line);
+
+ rectLine.height = hLine;
+
+ // and draw the ones which intersect the update rect
+ if ( rectLine.Intersects(rectUpdate) )
+ {
+ // don't allow drawing outside of the lines rectangle
+ wxDCClipper clip(dc, rectLine);
+
+ if ( IsSelected(line) )
+ {
+ wxBrush brush(wxSystemSettings::
+ GetColour(wxSYS_COLOUR_HIGHLIGHT),
+ wxSOLID);
+ dc.SetBrush(brush);
+ dc.SetPen(*wxTRANSPARENT_PEN);
+ dc.DrawRectangle(rectLine);
+ }
+
+ wxRect rect = rectLine;
+ OnDrawSeparator(dc, rect, line);
+
+ rect.Deflate(m_ptMargins.x, m_ptMargins.y);
+ OnDrawItem(dc, rect, line);
+ }
+ else // no intersection
+ {
+ if ( rectLine.GetTop() > rectUpdate.GetBottom() )
+ {
+ // we are already below the update rect, no need to continue
+ // further
+ break;
+ }
+ //else: the next line may intersect the update rect
+ }
+
+ rectLine.y += hLine;
+ }
+}
+
+// ----------------------------------------------------------------------------
+// wxVListBox keyboard handling
+// ----------------------------------------------------------------------------
+
+void wxVListBox::OnKeyDown(wxKeyEvent& event)
+{
+ int selection = 0; // just to silent the stupid compiler warnings
+ switch ( event.GetKeyCode() )
+ {
+ case WXK_HOME:
+ selection = 0;
+ break;
+
+ case WXK_END:
+ selection = GetLineCount() - 1;
+ break;
+
+ case WXK_DOWN:
+ if ( m_selection == (int)GetLineCount() - 1 )
+ return;
+
+ selection = m_selection + 1;
+ break;
+
+ case WXK_UP:
+ if ( m_selection == -1 )
+ selection = GetLineCount() - 1;
+ else if ( m_selection != 0 )
+ selection = m_selection - 1;
+ else // m_selection == 0
+ return;
+ break;
+
+ case WXK_PAGEDOWN:
+ case WXK_NEXT:
+ PageDown();
+ selection = GetFirstVisibleLine();
+ break;
+
+ case WXK_PAGEUP:
+ case WXK_PRIOR:
+ if ( m_selection == (int)GetFirstVisibleLine() )
+ {
+ PageUp();
+ }
+
+ selection = GetFirstVisibleLine();
+ break;
+
+ default:
+ event.Skip();
+ return;
+ }
+
+ DoSetSelection(selection);
+}
+
+// ----------------------------------------------------------------------------
+// wxVListBox mouse handling
+// ----------------------------------------------------------------------------
+
+void wxVListBox::OnLeftDown(wxMouseEvent& event)
+{
+ int item = HitTest(event.GetPosition());
+
+ DoSetSelection(item);
+}
+
+void wxVListBox::OnLeftDClick(wxMouseEvent& event)
+{
+ int item = HitTest(event.GetPosition());
+ if ( item != -1 )
+ {
+ wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, GetId());
+ event.SetEventObject(this);
+ event.m_commandInt = item;
+
+ (void)GetEventHandler()->ProcessEvent(event);
+ }
+}
+
projects / wxWidgets.git / commitdiff
