单元格中的 GTK 组合框

Question

我正在编写 GUI，在一个 window 我有一个列表，每行包含 3 列。

第一列是 int - 这里很简单，我给属性 "text" 并传递 int 值。我不确定它是否正确，但它有效。

第 3 列是图标 - 属性是 "icon-name"，传递带有图标名称的字符串，效果很好。

第 2 列是一个组合框 - 属性是一个 "model"，传递的是一个 GTKtreeModel，但它不起作用我尝试了不同的变体，但没有任何效果。

所以，思路是用gtk_cell_renderer_combo_new();传递模型并将我的第二列作为组合框。但是现在我得到了这个：

GLib-GObject-WARNING **: unable to set property 'model' of type 'GtkTreeModel' from value of type 'gchararray'

我没有找到任何 material 或有关如何在树中制作组合框的文档。有什么想法吗？

GtkWidget *type_list = gtk_tree_view_new();  //creating a main list

                    GtkCellRenderer *render;

                    render = gtk_cell_renderer_text_new (); // first column is text  
                    GtkTreeViewColumn* row_n = gtk_tree_view_column_new_with_attributes("#",render,"text",0, NULL); // name and type
                    gtk_tree_view_append_column(GTK_TREE_VIEW(type_list), row_n); //insert attribute into list

                    render = gtk_cell_renderer_combo_new (); //second column is combo
                    GtkTreeViewColumn* type_colomn = gtk_tree_view_column_new_with_attributes("Type",render, "model" , 1, NULL); // name and type - model as GTK doc said it must be model
                    gtk_tree_view_append_column(GTK_TREE_VIEW(type_list), type_colomn); // insert attribute into list

                    render = gtk_cell_renderer_pixbuf_new(); // third column is icon
                    GtkTreeViewColumn* delete_raw = gtk_tree_view_column_new_with_attributes("Delete",render, "icon-name", 2, NULL); // name and type icon-name to pass image from stock
                    gtk_tree_view_append_column(GTK_TREE_VIEW(type_list), delete_raw); // insert attribute into list

                    GtkListStore *store = gtk_list_store_new(3,G_TYPE_INT,G_TYPE_STRING,G_TYPE_STRING); // describe list storage; 3 types, int, string, string, I'm not sure if it correct

              //creating list of options
                    GtkTreeIter itr;
                    gtk_list_store_append(store,&itr);
                    int num = 1;


                    const gchar *type[] = {"1 option", "2 option", "3 option", "4 option", "5 option"};
                    GtkListStore *list = gtk_list_store_new(1,G_TYPE_STRING); //creating list store to pass in combo
                    for (int i=0;i++<4;){   
                        gtk_list_store_insert_with_values(list,NULL,-1, 0,type[i-1],-1); // insert values into list
                    }
          //____________________________
                        //g_object_set (G_OBJECT (render_combo), "model",list,"editable", TRUE,NULL); // unsuccessful try with g_object_set

                    gtk_list_store_set(store, &itr, 0, num, 1,GTK_TREE_MODEL(list), 2, "edit-delete", -1); //insert data to the row

                    gtk_tree_view_set_model(GTK_TREE_VIEW(type_list),GTK_TREE_MODEL(store));

                    g_object_unref (G_OBJECT (store));  // free memory
                    g_object_unref (G_OBJECT (list)); // free memory
                gtk_container_add(GTK_CONTAINER(node_type),type_list);

Answer 1

您需要为组合框模型创建一个新商店。与树视图完全不同的一个。然后将此商店设置为组合框模型属性。然后将此行更改为：

GtkTreeViewColumn* type_colomn = gtk_tree_view_column_new_with_attributes("Type",render, "text" , 1, NULL); // name and type - model as GTK doc said it must be model

因为您没有在模型中存储模型。您正在树视图列中呈现树视图模型的文本。

组合框是一个完全独立的对象，在编辑单元格（单击两次）时弹出。

我会 post 一些 C 示例，但我最了解 Python 并且从未在 C 中这样做过。

Answer 2

感谢@theGtknerd 解释了传递给商店模型的确切内容。如果有人遇到同样的问题，我会在我的答案底部包含的网站上找到解决方案。使组合框工作的最重要的行是：

g_object_set(render, "model", combo_list, "text-column", 0, "has-entry", FALSE, "editable", TRUE, (char *)NULL);

在结果中我们有以下列：

            render = gtk_cell_renderer_combo_new ();
            //creating a list for combo box
            const gchar *type[] = {"option 1", "option 2", "option 3", "option 4", "option 5"};
            GtkListStore *combo_list = gtk_list_store_new(1,G_TYPE_STRING);   // list for  combo box
            for (int i=0;i++<=4;){  
                gtk_list_store_insert_with_values(combo_list,NULL,-1, 0,type[i-1],-1);
            }
            //____returning list, free list at line 309
            g_object_set(render, "model", combo_list, "text-column", 0, "has-entry", FALSE, "editable", TRUE, (char *)NULL); 
            //g_signal_connect(render, "editing-started", G_CALLBACK(/*on_tree_cell_combo_editing_start*/), NULL); 
            GtkTreeViewColumn* type_colomn = gtk_tree_view_column_new_with_attributes("Type",render, "text" , 1, NULL);
            gtk_tree_view_append_column(GTK_TREE_VIEW(type_list), type_colomn);

插入新行的示例是：

            GtkListStore *store = gtk_list_store_new(3,G_TYPE_UINT,G_TYPE_STRING,G_TYPE_STRING);

            GtkTreeIter itr;
            gtk_list_store_append(store,&itr);
            int num = 1;

            gtk_list_store_set(store, &itr, 0, num, 1,"char", 2, "edit-delete", -1);

这里有一个对我有帮助的很好的例子： GTK cell combo box example

单元格中的 GTK 组合框

GTK combo box in cell

c

gtk

gtk3