Glade/gtkmm TreeView

Question

在跟进我之前关于这个问题的问题的答案时,我已经取得了一些进展,并且正在寻找下一点指导.简而言之,我无法使用gtkmm应用程序从Glade加载Treeview.

首先,这是源头.班级:

typedef struct
{
  Gtk::Window *window_info;
  Gtk::TreeView *treeview_info;
  Glib::RefPtr<Gtk::ListStore> liststore_info;

  class InfoColumns : public Gtk::TreeModel::ColumnRecord
  {
    public:
      InfoColumns() { add(time); add(message); }

      Gtk::TreeModelColumn<string> time;
      Gtk::TreeModelColumn<string> message;
  } info_columns;

}UiElements;

class GuiManager
{
  Glib::RefPtr<Gtk::Builder> builder;
  UiElements elements;

  public:
    GuiManager();

    void info_handler(string msg);
};

定义:

GuiManager::GuiManager()
{
  builder = Gtk::Builder::create();
  builder->add_from_file("GUI3.glade");

  builder->get_widget("window_info", elements.window_info);
  builder->get_widget("treeview_info", elements.treeview_info);

//these two methods of loading the liststore appear to function identically
  elements.liststore_info = Glib::RefPtr<Gtk::ListStore>::cast_dynamic(builder->get_object("liststore_info"));
//  elements.liststore_info = Gtk::ListStore::create(elements.info_columns);

  elements.treeview_info->set_model(elements.liststore_info);

//if I append the columns, the data appears at the end of the list
//  elements.treeview_info->append_column("Time", elements.info_columns.time);
//  elements.treeview_info->append_column("Message", elements.info_columns.message);
}

void GuiManager::info_handler(string msg)
{
  Gtk::TreeModel::Row row = *(elements.liststore_info->append());
  row[elements.info_columns.time] = "Now";
  row[elements.info_columns.message] = msg;
}

和XML:

<object class="GtkListStore" id="liststore_info">
  <columns>
    <!-- column-name Time -->
    <column type="gchararray"/>
    <!-- column-name Message -->
    <column type="gchararray"/>
  </columns>
</object>
<object class="GtkWindow" id="window_info">
  <property name="can_focus">False</property>
  <property name="title" translatable="yes">Info</property>
  <child>
    <object class="GtkScrolledWindow" id="scrolledwindow_info">
      <property name="visible">True</property>
      <property name="can_focus">True</property>
      <property name="shadow_type">in</property>
      <property name="min_content_width">400</property>
      <property name="min_content_height">600</property>
      <child>
        <object class="GtkTreeView" id="treeview_info">
          <property name="visible">True</property>
          <property name="can_focus">True</property>
          <property name="model">liststore_info</property>
          <property name="enable_search">False</property>
          <property name="enable_grid_lines">both</property>
          <child internal-child="selection">
            <object class="GtkTreeSelection" id="treeview_info_selection"/>
          </child>
          <child>
            <object class="GtkTreeViewColumn" id="treeview_info_column_time">
              <property name="resizable">True</property>
              <property name="sizing">autosize</property>
              <property name="min_width">100</property>
              <property name="title" translatable="yes">Time</property>
              <property name="clickable">True</property>
              <child>
                <object class="GtkCellRendererText" id="treeview_info_cellrenderer_time"/>
              </child>
            </object>
          </child>
          <child>
            <object class="GtkTreeViewColumn" id="treeview_info_column_message">
              <property name="resizable">True</property>
              <property name="sizing">autosize</property>
              <property name="min_width">300</property>
              <property name="title" translatable="yes">Message</property>
              <property name="clickable">True</property>
              <child>
                <object class="GtkCellRendererText" id="treeview_info_cellrenderer_message"/>
              </child>
            </object>
          </child>
        </object>
      </child>
    </object>
  </child>
</object>

当我编译并运行此代码(加上一次调用info_handler())时,我得到一个包含一行和两个空白列的树视图.当我取消注释附加列的两行时,我得到一个包含一行和四列的树视图.前两列是空白的(根据glade文件调整大小),后两列具有"Now"和msg字符串(并根据内容自动调整大小).

我从中收集到的是elements.info_columns与elements.treeview_infovia 无关elements.liststore_info.看起来我只是错过了连接两者的步骤.liststore_info被列为treeview_infoglade文件中的模型,以及在GuiManager构造函数中设置.

断开的地方在哪里？

Answer 1

我认为您需要设置应在每个表列中显示哪个列表存储字段.

1. 在Glade中,右键单击树窗口小部件,然后单击编辑...(不单独编辑)
2. 单击" 层次结构"选项卡
3. 单击列
4. 在Properties and Attributes下,确保选中Text并从下拉列表中选择正确的列表存储列(这将相应地更新索引.)对于Pixbuf列,您需要Pixbuf Object而不是Text.
5. 对每列重复上述步骤

在您的情况下,我认为最终时间列的索引应为0,Message列的索引为1,所有其他字段的索引为-1.

这将从列表存储中的选定字段填充列的文本.我相信它是这样做的,所以如果你愿意的话,你也可以通过列表存储填充列的其他属性(字体,颜色等).

与此无关,我也会考虑更改Gtk::TreeModelColumn<string>为,Gtk::TreeModelColumn<Glib::ustring>因为我相信你现在拥有它的方式可能会导致Glib::ustring每次树视图重绘自己时转换.Glib::ustring从一开始就保持它应该避免大部分转换.