On 6 June 2012 09:51, Osmo Antero <osm...@gmail.com> wrote: > Hello, > I wanted to study the GtkCellRendererCombo so I added it directly to the > treeview (as column). > The combobox is initially hidden, only the "text" value is shown. > The combo becomes visible after user clicks or double-clicks the column in > the row. > > Unfortunately the click event does not work (or pass through) when the > GtkCellRendererCombo is baked inside a custom-renderer class. Therefore it > simply shows the "text" value, the combo-list itself is not accessible or > visible. > > This might explain why GTK3 has NO renderer for very common type of > widgets, like GtkButton. > There is no GtkCellRendererButton class because it cannot handle the > events. > > I may need to use the low-level painting functions directly, like > gtk_paint_arrow(...) > gtk_paint_shadow(...) > gtk_paint_box(...) > And somehow calculate the co-ordinates for click-events. > > Ref: http://developer.gnome.org/gtk3/3.4/GtkStyle.html > > All comments are welcome. > // Osmo Antero > > /* > Adding GtkCellRendererCombo directly (as column) to the treeview, just to > study its behaviour. > > GtkTreeStore *store = gtk_tree_store_new(NUM_COLS, > G_TYPE_INT, > G_TYPE_POINTER, > G_TYPE_STRING); // <-- combo "text" field > ... > > // Combo cell renderer (directly as column) > renderer = gtk_cell_renderer_combo_new(); > > GtkTreeIter iter; > GtkListStore *combo_store = gtk_list_store_new (1, G_TYPE_STRING); > gtk_list_store_append(combo_store, &iter); > gtk_list_store_set(combo_store, &iter, 0, "First Item", -1); > gtk_list_store_append(combo_store, &iter); > gtk_list_store_set(combo_store, &iter, 0, "Second Item", -1); > > g_object_set (renderer, "editable", FALSE, > "has-entry", TRUE, > "model", combo_store, > "text-column", 0, > NULL); > > col = gtk_tree_view_column_new(); > gtk_tree_view_column_pack_start (col, renderer, TRUE); > gtk_tree_view_column_add_attribute(col, renderer, "text", COL_2); > gtk_tree_view_column_set_title (col, "Combo"); > gtk_tree_view_append_column(GTK_TREE_VIEW(tv),col); > */ > > > On Tue, Jun 5, 2012 at 8:38 PM, Osmo Antero <osm...@gmail.com> wrote: > > > Hello, > > I want to create my own cell-renderer for a treeview widget. > > This custom cell will contain a text string and a combobox with some > > values. > > So my custom cell (row) contains both GtkCellRendererText and > > GtkCellRendererCombo widgets. > > > > The cell renderer works well that it displays the text string, but the > > combobox is *invisible*. > > > > In cell-renderer.c, I carefully get the size of the combobox: > > gtk_cell_renderer_get_preferred_size(p->combo_renderer, widget, NULL, > > &size); > > combo_area.width = size.width; > > combo_area.height = size.height; > > > > And then render it to cell with: > > combo_area.x = title_area.x + title_area.width + GUI_PAD; > > combo_area.y = fill_area.y + (fill_area.height - combo_area.height > )/2; > > gtk_cell_renderer_render(p->combo_renderer, window, widget, > > background_area, &combo_area, flags); > > > > See the render_row(...) function in "cell-renderer.c" file. > > But the p->combo_renderer (of type GtkCellRendererCombo) will not show > up. > > > > The treeview row should display: > > "Node 1-0 text [Combobox with values]" > > "Node 1-1 text [Combobox with values]" > > "Node 1-2 text [Combobox with values]" > > ... > > What could be wrong with my code? > > > > Here is a complete example of this: > > http://www.futuredesktop.org/tmp/Test6.tar.gz > > > > Use the "m.sh" script to compile it: > > $ ./m.sh > > > > Then run: > > $ ./main > > > > You should see this: > > http://bildr.no/view/1197967 > > > > I've implemented a custom combo in a cell renderer for Libgda, see the code at http://git.gnome.org/browse/libgda/tree/libgda-ui/data-entries/gdaui-data-cell-renderer-combo.c and specifically the gdaui_data_cell_renderer_combo_start_editing() method.
Hope it helps you, regards Vivien _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
