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gtk3: Implemented TListView.OnSelectItem

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git-svn-id: trunk@42967 -
This commit is contained in:
zeljko 2013-09-27 06:11:03 +00:00
parent c92edcbd6b
commit e6338e1d02
1 changed files with 89 additions and 0 deletions
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89
lcl/interfaces/gtk3/gtk3widgets.pas
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@ -514,11 +514,13 @@ type
TGtk3ListView = class(TGtk3ScrollableWin)
private
FPreselectedIndices: TFPList;
FIsTreeView: Boolean;
protected
function CreateWidget(const Params: TCreateParams):PGtkWidget; override;
function EatArrowKeys(const AKey: Word): Boolean; override;
public
destructor Destroy; override;
{interface implementation}
function getHorizontalScrollbar: PGtkScrollbar; override;
function getVerticalScrollbar: PGtkScrollbar; override;
@ -4850,6 +4852,80 @@ end;
{ TGtk3ListView }
function Gtk3WS_ListViewItemPreSelected({%H-}selection: PGtkTreeSelection; {%H-}model: PGtkTreeModel;
path: PGtkTreePath; path_is_currently_selected: GBoolean; AData: GPointer): GBoolean; cdecl;
begin
// DebugLn('Gtk3WS_ListViewItemSelected ,path selected ',dbgs(path_is_currently_selected));
// this function is called *before* the item is selected
// The result should be True to allow the Item to change selection
Result := True;
if (AData = nil) or TGtk3Widget(AData).InUpdate then
exit;
if not Assigned(TGtk3ListView(AData).FPreselectedIndices) then
TGtk3ListView(AData).FPreselectedIndices := TFPList.Create;
if TGtk3ListView(AData).FPreselectedIndices.IndexOf(Pointer(PtrInt(gtk_tree_path_get_indices(path)^))) = -1 then
TGtk3ListView(AData).FPreselectedIndices.Add(Pointer(PtrInt(gtk_tree_path_get_indices(path)^)));
end;
procedure Gtk3WS_ListViewItemSelected(ASelection: PGtkTreeSelection; AData: GPointer); cdecl;
var
ATreeView: PGtkTreeView;
AList: PGList;
Msg: TLMNotify;
NM: TNMListView;
Path: PGtkTreePath;
Indices: Integer;
i, j: Integer;
B: Boolean;
begin
if (AData = nil) or TGtk3Widget(AData).InUpdate then
exit;
if not Assigned(TGtk3ListView(AData).FPreselectedIndices) then
exit;
ATreeView := gtk_tree_selection_get_tree_view(ASelection);
AList := gtk_tree_selection_get_selected_rows(ASelection, nil);
TGtk3Widget(AData).BeginUpdate; // dissalow entering Gtk3WS_ListViewItemPreSelected
try
for i := 0 to TGtk3ListView(AData).FPreselectedIndices.Count - 1 do
begin
FillChar(Msg{%H-}, SizeOf(Msg), 0);
Msg.Msg := CN_NOTIFY;
FillChar(NM{%H-}, SizeOf(NM), 0);
NM.hdr.hwndfrom := HWND(TGtk3Widget(AData));
NM.hdr.code := LVN_ITEMCHANGED;
NM.iItem := PtrInt(TGtk3ListView(AData).FPreselectedIndices.Items[i]);
NM.iSubItem := 0;
B := False;
for j := 0 to g_list_length(AList) - 1 do
begin
Path := g_list_nth_data(AList, guint(j));
if Path <> nil then
begin
Indices := gtk_tree_path_get_indices(Path)^;
B := Indices = PtrInt(TGtk3ListView(AData).FPreselectedIndices.Items[i]);
if B then
break;
end;
end;
if not B then
NM.uOldState := LVIS_SELECTED
else
NM.uNewState := LVIS_SELECTED;
NM.uChanged := LVIF_STATE;
Msg.NMHdr := @NM.hdr;
DeliverMessage(TGtk3Widget(AData).LCLObject, Msg);
end;
finally
FreeAndNil(TGtk3ListView(AData).FPreselectedIndices);
if AList <> nil then
g_list_free(AList);
TGtk3Widget(AData).EndUpdate;
end;
end;
function TGtk3ListView.CreateWidget(const Params: TCreateParams): PGtkWidget;
var
AListView: TCustomListView;
@ -4859,6 +4935,7 @@ var
begin
FScrollX := 0;
FScrollY := 0;
FPreselectedIndices := nil;
FWidgetType := FWidgetType + [wtTreeModel, wtListView, wtScrollingWin];
AListView := TCustomListView(LCLObject);
Result := PGtkScrolledWindow(TGtkScrolledWindow.new(nil, nil));
@ -4889,6 +4966,12 @@ begin
g_object_unref (PGObject(TreeModel));
PGtkScrolledWindow(Result)^.set_can_focus(False);
PGtkTreeView(FCentralWidget)^.set_can_focus(True);
if FIsTreeView then
begin
gtk_tree_selection_set_select_function(PGtkTreeView(FCentralWidget)^.get_selection, TGtkTreeSelectionFunc(@Gtk3WS_ListViewItemPreSelected),
Self, nil);
g_signal_connect_data(PGtkTreeView(FCentralWidget)^.get_selection, 'changed', TGCallback(@Gtk3WS_ListViewItemSelected), Self, nil, 0);
end;
// if FIsTreeView then
// PGtkTreeView(FCentralWidget)^.set_search_column(0);
end;
@ -4898,6 +4981,12 @@ begin
Result := False;
end;
destructor TGtk3ListView.Destroy;
begin
FreeAndNil(FPreselectedIndices);
inherited Destroy;
end;
function TGtk3ListView.getHorizontalScrollbar: PGtkScrollbar;
begin
Result := nil;