GTK3 C程序按钮 GTK使用 GTKTreeView 和 GTKListStore 滚动窗口，将行滚动到视图中-解网

问：

我用 C 语言将一个程序移植到 GTK3 中，除了一件事之外，一切都很完美。假设 TreeView 一次只显示 10 行，但填充了 100 行，其他行当然不在视图中，树视图设置为带有多个列的单选行。

我使用按钮回调函数突出显示，然后选择第 0 行，然后在调用结束时递增静态索引++。按下下一个按钮突出显示并选择第 1 行，依此类推。

当突出显示并选中的行到达第 11 行（不在视图范围内）时，我无法弄清楚如何滚动树视图以便下一个第 11 行进入视图。这些行不断突出显示，因为我有 printf 语句用于反馈。我用谷歌搜索了几个星期，看到了示例和所有内容，但对于 C 来说却不是那么多，尽管我不得不将其他一些代码翻译成 C，我曾经弄清楚如何选择和突出显示行，但在 C 中无法弄清楚滚动部分。

使用Glade，我有一个主窗口，里面有一个子GtkFixed，有一个按钮，进度条，在GtkFixed中是一个GtkScrolledWindow，它包含一个GtkViewPort，里面是GtkTreeView，里面有基于字符串的列。

感谢您的任何反馈和/或链接。不确定 TreeView 是否需要在 GtkViewPort 中，但可能在开发和研究期间查看了较旧的代码。

我的回调函数

void single_button_clicked_cb(GtkWidget *widget, gpointer data)
{
    static int         index = 0;
    GtkTreeIter iter;
    char buf[9];
    GtkTreeModel *model;
    GtkAdjustment *vadjustment;
    int i;

    printf("\nScroll Active test row to %d\n",index);

    sprintf(buf,"%d",index);

    gtk_widget_grab_focus (GTK_WIDGET(gtk_tree_view));

    GtkTreePath *path = gtk_tree_path_new_from_string(buf);

    gtk_tree_view_scroll_to_cell(GTK_TREE_VIEW (gtk_tree_view),path, NULL,FALSE, 0.0, 0.0);

    gtk_tree_view_set_cursor (gtk_tree_view,path,NULL,FALSE); // works but doesn't scroll

    gtk_tree_path_free(path);

    index++;
}

Glade 文件

<?xml version="1.0" encoding="UTF-8"?>
<interface>
  <!-- interface-requires gtk+ 3.0 -->
  <!-- interface-naming-policy toplevel-contextual -->
  <object class="GtkAdjustment" id="adjustment1">
    <property name="upper">100</property>
    <property name="step_increment">1</property>
    <property name="page_increment">10</property>
  </object>
  <object class="GtkListStore" id="gtk_list_store">
    <columns>
      <!-- column-name Test -->
      <column type="gchararray"/>
      <!-- column-name Test1 -->
      <column type="gchararray"/>
      <!-- column-name Test2 -->
      <column type="gchararray"/>
      <!-- column-name Test3 -->
      <column type="gchararray"/>
      <!-- column-name Test4 -->
      <column type="gchararray"/>
      <!-- column-name Pass -->
      <column type="gchararray"/>
    </columns>
  </object>
  <object class="GtkWindow" id="main_window">
    <property name="width_request">1050</property>
    <property name="height_request">810</property>
    <property name="can_focus">False</property>
    <property name="border_width">3</property>
    <property name="resizable">False</property>
    <property name="window_position">center</property>
    <property name="gravity">center</property>
    <signal name="destroy" handler="on_main_window_destroy" swapped="no"/>
    <child>
      <object class="GtkFixed" id="gtk_fixed">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <child>
          <object class="GtkButton" id="start_button">
            <property name="label" translatable="yes">Start</property>
            <property name="width_request">100</property>
            <property name="height_request">48</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <signal name="clicked" handler="start_button_clicked_cb" swapped="no"/>
          </object>
          <packing>
            <property name="x">935</property>
            <property name="y">605</property>
          </packing>
        </child>
        <child>
          <object class="GtkButton" id="single_button">
            <property name="label" translatable="yes">Single</property>
            <property name="width_request">100</property>
            <property name="height_request">48</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <signal name="clicked" handler="single_button_clicked_cb" swapped="no"/>
          </object>
          <packing>
            <property name="x">6</property>
            <property name="y">605</property>
          </packing>
        </child>
        <child>
          <object class="GtkProgressBar" id="progress_bar">
            <property name="width_request">1030</property>
            <property name="height_request">25</property>
            <property name="visible">True</property>
            <property name="can_focus">False</property>
          </object>
          <packing>
            <property name="x">1</property>
            <property name="y">100</property>
          </packing>
        </child>
        <child>
          <object class="GtkScrolledWindow" id="scrolled_window">
            <property name="width_request">1030</property>
            <property name="height_request">465</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="vadjustment">adjustment1</property>
            <property name="hscrollbar_policy">never</property>
            <property name="vscrollbar_policy">automatic</property>
            <child>
              <object class="GtkViewport" id="gtk_viewport">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <child>
                  <object class="GtkTreeView" id="gtk_tree_view">
                    <property name="visible">True</property>
                    <property name="can_focus">True</property>
                    <property name="model">gtk_list_store</property>
                    <property name="headers_clickable">False</property>
                    <property name="enable_grid_lines">both</property>
                    <signal name="cursor-changed" handler="selected_row_index_cb" swapped="no"/>
                    <child>
                      <object class="GtkTreeViewColumn" id="col_test_description">
                        <property name="resizable">True</property>
                        <property name="title" translatable="yes">Test Description</property>
                        <child>
                          <object class="GtkCellRendererText" id="col_renderer_description"/>
                        </child>
                      </object>
                    </child>
                    <child>
                      <object class="GtkTreeViewColumn" id="col_test_number">
                        <property name="resizable">True</property>
                        <property name="title" translatable="yes">Test Number</property>
                        <property name="alignment">0.5</property>
                        <child>
                          <object class="GtkCellRendererText" id="col_renderer_number"/>
                        </child>
                      </object>
                    </child>
                    <child>
                      <object class="GtkTreeViewColumn" id="col_test_limits">
                        <property name="resizable">True</property>
                        <property name="title" translatable="yes">Test Limits</property>
                        <property name="alignment">0.5</property>
                        <child>
                          <object class="GtkCellRendererText" id="col_renderer_limits"/>
                        </child>
                      </object>
                    </child>
                    <child>
                      <object class="GtkTreeViewColumn" id="col_test_measurement">
                        <property name="resizable">True</property>
                        <property name="title" translatable="yes">Test Measurement</property>
                        <property name="alignment">0.5</property>
                        <child>
                          <object class="GtkCellRendererText" id="col_renderer_measurement"/>
                        </child>
                      </object>
                    </child>
                    <child>
                      <object class="GtkTreeViewColumn" id="col_test_units">
                        <property name="resizable">True</property>
                        <property name="title" translatable="yes">Test Units</property>
                        <child>
                          <object class="GtkCellRendererText" id="col_renderer_units"/>
                        </child>
                      </object>
                    </child>
                    <child>
                      <object class="GtkTreeViewColumn" id="col_test_pass_fail">
                        <property name="resizable">True</property>
                        <property name="title" translatable="yes">Pass / Fail</property>
                        <property name="alignment">0.5</property>
                        <child>
                          <object class="GtkCellRendererText" id="col_renderer_pass_fail"/>
                        </child>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
          </object>
          <packing>
            <property name="x">3</property>
            <property name="y">132</property>
          </packing>
        </child>
        <child>
          <object class="GtkMenuBar" id="menu">
            <property name="width_request">180</property>
            <property name="height_request">30</property>
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <child>
              <object class="GtkMenuItem" id="gtk_file_menu_item">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">_File</property>
                <property name="use_underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu" id="gtk_file_menu">
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem" id="gtk_new">
                        <property name="label">gtk-new</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="gtk_open">
                        <property name="label">gtk-open</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                        <signal name="activate" handler="open_limits_file" swapped="no"/>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="gtk_save">
                        <property name="label">gtk-save</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="gtk_save_as">
                        <property name="label">gtk-save-as</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkSeparatorMenuItem" id="separatormenuitem1">
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="gtk_quit">
                        <property name="label">gtk-quit</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                        <signal name="activate" handler="on_main_window_destroy" swapped="no"/>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem" id="gtk_edit_menu_item">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">_Edit</property>
                <property name="use_underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu" id="gtk_edit_menu">
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem6">
                        <property name="label">gtk-cut</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem7">
                        <property name="label">gtk-copy</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem8">
                        <property name="label">gtk-paste</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem9">
                        <property name="label">gtk-delete</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem" id="gtk_view_menu_item">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">_View</property>
                <property name="use_underline">True</property>
              </object>
            </child>
            <child>
              <object class="GtkMenuItem" id="gtk_help_menu_item">
                <property name="visible">True</property>
                <property name="can_focus">False</property>
                <property name="label" translatable="yes">_Help</property>
                <property name="use_underline">True</property>
                <child type="submenu">
                  <object class="GtkMenu" id="gtk_help_menu">
                    <property name="visible">True</property>
                    <property name="can_focus">False</property>
                    <child>
                      <object class="GtkImageMenuItem" id="imagemenuitem10">
                        <property name="label">gtk-about</property>
                        <property name="visible">True</property>
                        <property name="can_focus">False</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
            </child>
          </object>
          <packing>
            <property name="x">-1</property>
            <property name="y">-1</property>
          </packing>
        </child>
        <child>
          <object class="GtkLabel" id="test_name">
            <property name="width_request">1030</property>
            <property name="height_request">80</property>
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="use_markup">True</property>
            <property name="justify">center</property>
            <property name="single_line_mode">True</property>
          </object>
          <packing>
            <property name="x">3</property>
            <property name="y">667</property>
          </packing>
        </child>
        <child>
          <object class="GtkLabel" id="test_command">
            <property name="width_request">1030</property>
            <property name="height_request">80</property>
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="use_markup">True</property>
            <property name="justify">center</property>
            <property name="single_line_mode">True</property>
          </object>
          <packing>
            <property name="x">3</property>
            <property name="y">32</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>

C 卷轴格莱德 GTKTREEVIEW

1赞 Michi 2/21/2020

如果可能的话，你应该避免GtkFixed。

0赞 Michi 2/21/2020

我不熟悉 Glade（我永远不会使用它），但是使用整数设置调整属性一定是个坏主意。你需要 gdouble。

0赞 blackedpi 2/22/2020

我是 GTK 的新手，速成课程学到了我在谷歌上可以找到的东西。GtkFixed有什么问题？我还在学习。谢谢。

1赞 Michi 2/23/2020

developer.gnome.org/gtk3/stable/ 检查其文档...

0赞 blackedpi 2/23/2020

谢谢。我已经阅读了开发人员网站的大部分文档，但仅此而已。但是阅读使用GtkFixed的教程。感谢您指出这一点。可能就是为什么还有其他问题的原因。

答：

1赞 blackedpi 2/15/2020 #1

我终于找到了问题所在。我发现的另一个示例是将树视图作为视口的子项。也许来自以前版本的 GTK。

摘自文档 GtkScrolledWindow 的 Gnome 开发者文档

滚动窗口可以通过两种方式工作。一些小部件具有本机滚动支持;这些小部件实现了GtkScrollable接口。具有原生滚动支持的小部件包括 GtkTreeView、GtkTextView 和 GtkLayout。

对于缺乏原生滚动支持的 widget，GtkViewport widget 充当适配器类，为缺乏自己滚动功能的子 widget 实现可滚动性。使用 GtkViewport 滚动子小部件，如 GtkGrid、GtkBox 等。

1赞 blackedpi 2/15/2020

我只是通过手动编辑林间空地文件简单地删除了视口作为树视图父级。现在像魅力和自动滚动一样工作！

上一个：如何将“隐藏数据”分配给Gtk.TreeView行，以便使用Gtk.TreeView.connect（“row-activated”）捕获它们？

下一个：自定义 Gtk.CellRenderer，在 True、None（显示为不一致）和 False、python GTK 3 之间切换循环

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