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implemented multiple selection

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21040 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2003-06-11 11:40:37 +00:00
parent ae0f022346
commit be46555538
2 changed files with 412 additions and 85 deletions
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335
src/generic/vlbox.cpp
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@@ -30,6 +30,7 @@
#endif //WX_PRECOMP
#include "wx/vlbox.h"
#include "wx/selstore.h"
// ----------------------------------------------------------------------------
// event tables
@@ -53,14 +54,14 @@ END_EVENT_TABLE()
void wxVListBox::Init()
{
m_selection = -1;
m_current = wxNOT_FOUND;
m_selStore = NULL;
}
bool wxVListBox::Create(wxWindow *parent,
wxWindowID id,
const wxPoint& pos,
const wxSize& size,
size_t countItems,
long style,
const wxString& name)
{
@@ -69,60 +70,206 @@ bool wxVListBox::Create(wxWindow *parent,
SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_LISTBOX));
SetItemCount(countItems);
if ( style & wxLB_MULTIPLE )
m_selStore = new wxSelectionStore;
return true;
}
wxVListBox::~wxVListBox()
{
delete m_selStore;
}
void wxVListBox::SetItemCount(size_t count)
{
if ( m_selStore )
{
// tell the selection store that our number of items has changed
m_selStore->SetItemCount(count);
}
SetLineCount(count);
}
// ----------------------------------------------------------------------------
// selection handling
// ----------------------------------------------------------------------------
void wxVListBox::DoSetSelection(int selection, bool sendEvent)
bool wxVListBox::IsSelected(size_t line) const
{
if ( selection == m_selection )
return m_selStore ? m_selStore->IsSelected(line) : (int)line == m_current;
}
bool wxVListBox::Select(size_t item, bool select)
{
wxCHECK_MSG( m_selStore, false,
_T("Select() may only be used with multiselection listbox") );
wxCHECK_MSG( item < GetItemCount(), false,
_T("Select(): invalid item index") );
bool changed = m_selStore->SelectItem(item, select);
if ( changed )
{
// nothing to do
return;
// selection really changed
RefreshLine(item);
}
if ( m_selection != -1 )
RefreshLine(m_selection);
DoSetCurrent(item);
m_selection = selection;
return changed;
}
if ( m_selection != -1 )
bool wxVListBox::SelectRange(size_t from, size_t to)
{
wxCHECK_MSG( m_selStore, false,
_T("SelectRange() may only be used with multiselection listbox") );
// make sure items are in correct order
if ( from > to )
{
size_t tmp = from;
from = to;
to = tmp;
}
wxCHECK_MSG( to < GetItemCount(), false,
_T("SelectRange(): invalid item index") );
wxArrayInt changed;
if ( !m_selStore->SelectRange(from, to, true, &changed) )
{
// too many items have changed, we didn't record them in changed array
// so we have no choice but to refresh everything between from and to
RefreshLines(from, to);
}
else // we've got the indices of the changed items
{
const size_t count = changed.GetCount();
if ( !count )
{
// nothing changed
return false;
}
// refresh just the lines which have really changed
for ( size_t n = 0; n < count; n++ )
{
RefreshLine(changed[n]);
}
}
// something changed
return true;
}
bool wxVListBox::DoSelectAll(bool select)
{
wxCHECK_MSG( m_selStore, false,
_T("SelectAll may only be used with multiselection listbox") );
size_t count = GetItemCount();
if ( count )
{
wxArrayInt changed;
if ( !m_selStore->SelectRange(0, count - 1, select) ||
!changed.IsEmpty() )
{
Refresh();
// something changed
return true;
}
}
return false;
}
bool wxVListBox::DoSetCurrent(int current)
{
if ( current == m_current )
{
// nothing to do
return false;
}
if ( m_current != wxNOT_FOUND )
RefreshLine(m_current);
m_current = current;
if ( m_current != wxNOT_FOUND )
{
// 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) )
if ( !IsVisible(m_current) )
{
ScrollToLine(m_selection);
ScrollToLine(m_current);
}
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() )
if ( (size_t)m_current == GetLastVisibleLine() )
{
ScrollToLine(m_selection);
ScrollToLine(m_current);
}
// 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);
RefreshLine(m_current);
}
}
return true;
}
void wxVListBox::SendSelectedEvent()
{
wxASSERT_MSG( m_current != wxNOT_FOUND,
_T("SendSelectedEvent() shouldn't be called") );
wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, GetId());
event.SetEventObject(this);
event.m_commandInt = m_current;
(void)GetEventHandler()->ProcessEvent(event);
}
void wxVListBox::SetSelection(int selection)
{
wxASSERT_MSG( !HasMultipleSelection(),
_T("SetSelection() is invalid with multiselection listbox") );
DoSetCurrent(selection);
}
size_t wxVListBox::GetSelectedCount() const
{
return m_selStore ? m_selStore->GetSelectedCount()
: m_current == wxNOT_FOUND ? 0 : 1;
}
int wxVListBox::GetFirstSelected(unsigned long& cookie) const
{
cookie = 0;
return GetNextSelected(cookie);
}
int wxVListBox::GetNextSelected(unsigned long& cookie) const
{
wxCHECK_MSG( m_selStore, wxNOT_FOUND,
_T("GetFirst/NextSelected() may only be used with multiselection listboxes") );
while ( cookie < GetItemCount() )
{
if ( IsSelected(cookie++) )
return cookie - 1;
}
return wxNOT_FOUND;
}
// ----------------------------------------------------------------------------
@@ -175,13 +322,24 @@ void wxVListBox::OnPaint(wxPaintEvent& event)
// don't allow drawing outside of the lines rectangle
wxDCClipper clip(dc, rectLine);
if ( IsSelected(line) )
// we need to render selected and current items differently
const bool isSelected = IsSelected(line);
if ( isSelected || IsCurrent(line) )
{
wxBrush brush(wxSystemSettings::
GetColour(wxSYS_COLOUR_HIGHLIGHT),
wxSOLID);
dc.SetBrush(brush);
dc.SetPen(*wxTRANSPARENT_PEN);
if ( isSelected )
{
wxBrush brush(wxSystemSettings::
GetColour(wxSYS_COLOUR_HIGHLIGHT),
wxSOLID);
dc.SetBrush(brush);
}
else // !selected
{
dc.SetBrush(*wxTRANSPARENT_BRUSH);
}
dc.SetPen(*(IsCurrent(line) ? wxBLACK_PEN : wxTRANSPARENT_PEN));
dc.DrawRectangle(rectLine);
}
@@ -206,53 +364,126 @@ void wxVListBox::OnPaint(wxPaintEvent& event)
}
}
// ============================================================================
// wxVListBox keyboard/mouse handling
// ============================================================================
void wxVListBox::DoHandleItemClick(int item, bool shiftDown, bool ctrlDown)
{
// has anything worth telling the client code about happened?
bool notify = false;
if ( HasMultipleSelection() )
{
// select the iteem clicked?
bool select = true;
// NB: the keyboard interface we implement here corresponds to
// wxLB_EXTENDED rather than wxLB_MULTIPLE but this one makes more
// sense IMHO
if ( shiftDown )
{
if ( m_current != wxNOT_FOUND )
{
select = false;
// only the range from old m_current to new m_current must be
// selected
if ( DeselectAll() )
notify = true;
if ( SelectRange(m_current, item) )
notify = true;
}
//else: treat it as ordinary click/keypress
}
else if ( ctrlDown )
{
select = false;
Toggle(item);
// the status of the item has definitely changed
notify = true;
}
//else: behave as in single selection case
if ( select )
{
// make the clicked item the only selection
if ( DeselectAll() )
notify = true;
if ( Select(item) )
notify = true;
}
}
// in any case the item should become the current one
if ( DoSetCurrent(item) )
{
if ( !HasMultipleSelection() )
{
// this has also changed the selection for single selection case
notify = true;
}
}
if ( notify )
{
// notify the user about the selection change
SendSelectedEvent();
}
//else: nothing changed at all
}
// ----------------------------------------------------------------------------
// wxVListBox keyboard handling
// keyboard handling
// ----------------------------------------------------------------------------
void wxVListBox::OnKeyDown(wxKeyEvent& event)
{
int selection = 0; // just to silent the stupid compiler warnings
int current = 0; // just to silent the stupid compiler warnings
switch ( event.GetKeyCode() )
{
case WXK_HOME:
selection = 0;
current = 0;
break;
case WXK_END:
selection = GetLineCount() - 1;
current = GetLineCount() - 1;
break;
case WXK_DOWN:
if ( m_selection == (int)GetLineCount() - 1 )
if ( m_current == (int)GetLineCount() - 1 )
return;
selection = m_selection + 1;
current = m_current + 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
if ( m_current == wxNOT_FOUND )
current = GetLineCount() - 1;
else if ( m_current != 0 )
current = m_current - 1;
else // m_current == 0
return;
break;
case WXK_PAGEDOWN:
case WXK_NEXT:
PageDown();
selection = GetFirstVisibleLine();
current = GetFirstVisibleLine();
break;
case WXK_PAGEUP:
case WXK_PRIOR:
if ( m_selection == (int)GetFirstVisibleLine() )
if ( m_current == (int)GetFirstVisibleLine() )
{
PageUp();
}
selection = GetFirstVisibleLine();
current = GetFirstVisibleLine();
break;
default:
@@ -260,7 +491,7 @@ void wxVListBox::OnKeyDown(wxKeyEvent& event)
return;
}
DoSetSelection(selection);
DoHandleItemClick(current, event.ShiftDown(), event.ControlDown());
}
// ----------------------------------------------------------------------------
@@ -271,13 +502,19 @@ void wxVListBox::OnLeftDown(wxMouseEvent& event)
{
int item = HitTest(event.GetPosition());
DoSetSelection(item);
DoHandleItemClick(item, event.ShiftDown(),
#ifdef __WXMAC__
event.MetaDown()
#else
event.ControlDown()
#endif
);
}
void wxVListBox::OnLeftDClick(wxMouseEvent& event)
{
int item = HitTest(event.GetPosition());
if ( item != -1 )
if ( item != wxNOT_FOUND )
{
wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, GetId());
event.SetEventObject(this);