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Add support for freezing columns and/or rows of wxGrid

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Add wxGrid::FreezeTo() method which allows to freeze the given number of
columns and/or rows at the beginning of the grid, i.e. keep them pinned
in place while the rest of the grid is scrolled.

The main wxGridWindow (m_gridWin) now corresponds to the non-frozen part
of the grid, with up to 3 new similar windows for the frozen
rows/columns and the frozen corner cells (which only exist if both rows
and columns are frozen) being additionally used.

Doing this involved adding "wxGridWindow*" parameter to many functions
that previously only worked with m_gridWin itself and addressing
additional complications, such as mouse events that can now cross
different windows.

See https://github.com/wxWidgets/wxWidgets/pull/952 for the original
version of the changes.
This commit is contained in:
lucian-rotariu
2019-07-03 23:07:30 +03:00
committed by Vadim Zeitlin
parent f61b58bba3
commit 04f7f1fd32
6 changed files with 1477 additions and 409 deletions
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36
samples/grid/griddemo.cpp
View File

@@ -189,6 +189,8 @@ wxBEGIN_EVENT_TABLE( GridFrame, wxFrame )
EVT_MENU( ID_SELCOLS, GridFrame::SelectCols )
EVT_MENU( ID_SELROWSORCOLS, GridFrame::SelectRowsOrCols )
EVT_MENU( ID_FREEZE_OR_THAW, GridFrame::FreezeOrThaw )
EVT_MENU( ID_SET_CELL_FG_COLOUR, GridFrame::SetCellFgColour )
EVT_MENU( ID_SET_CELL_BG_COLOUR, GridFrame::SetCellBgColour )
@@ -370,6 +372,8 @@ GridFrame::GridFrame()
editMenu->Append( ID_CLEARGRID, "Cl&ear grid cell contents" );
editMenu->Append( ID_SETCORNERLABEL, "&Set corner label..." );
editMenu->AppendCheckItem( ID_FREEZE_OR_THAW, "Freeze up to cursor\tCtrl-F" );
wxMenu *selectMenu = new wxMenu;
selectMenu->Append( ID_SELECT_UNSELECT, "Add new cells to the selection",
"When off, old selection is deselected before "
@@ -573,10 +577,10 @@ GridFrame::GridFrame()
"This takes two cells",
"Another choice",
};
grid->SetCellEditor(4, 0, new wxGridCellChoiceEditor(WXSIZEOF(choices), choices));
grid->SetCellSize(4, 0, 1, 2);
grid->SetCellValue(4, 0, choices[0]);
grid->SetCellOverflow(4, 0, false);
grid->SetCellEditor(4, 2, new wxGridCellChoiceEditor(WXSIZEOF(choices), choices));
grid->SetCellSize(4, 2, 1, 2);
grid->SetCellValue(4, 2, choices[0]);
grid->SetCellOverflow(4, 2, false);
grid->SetCellSize(7, 1, 3, 4);
grid->SetCellAlignment(7, 1, wxALIGN_CENTRE, wxALIGN_CENTRE);
@@ -1209,6 +1213,30 @@ void GridFrame::SelectRowsOrCols( wxCommandEvent& WXUNUSED(ev) )
grid->SetSelectionMode( wxGrid::wxGridSelectRowsOrColumns );
}
void GridFrame::FreezeOrThaw(wxCommandEvent& ev)
{
if ( ev.IsChecked() )
{
if ( !grid->FreezeTo(grid->GetGridCursorCoords()) )
{
wxLogMessage("Failed to freeze the grid.");
GetMenuBar()->Check(ID_FREEZE_OR_THAW, false);
return;
}
wxLogMessage("Grid is now frozen");
}
else
{
// This never fails.
grid->FreezeTo(0, 0);
wxLogMessage("Grid is now thawed");
}
GetMenuBar()->Enable( ID_TOGGLECOLMOVING, !grid->IsFrozen() );
}
void GridFrame::SetCellFgColour( wxCommandEvent& WXUNUSED(ev) )
{
wxColour col = wxGetColourFromUser(this);