【问题标题】:Limit height of GtkTreeViewGtkTreeView 的限制高度
【发布时间】:2018-02-01 09:32:34
【问题描述】:

我正在尝试为 GtkTreeView 设置高度限制,如果行数据超过此限制,我想使用滚动条。目前,整个窗口无限制地增长,并在某些时候离开屏幕。要获得所需的行为需要什么?

我的 Python 代码(它只是在每次按钮单击时向列表存储添加一个新行):

#!/usr/bin/env python3

import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

class MyApp:

    def on_window1_destroy(self, obj, data=None):
        Gtk.main_quit()

    def button1_clicked(self, object):
        liststore = self.builder.get_object("liststore1")
        print(self.window.get_default_size())
        liststore.append(("test",))

    def __init__(self):
        self.builder = Gtk.Builder()
        self.builder.add_from_file("table_test.glade")
        self.builder.connect_signals(self)
        self.window = self.builder.get_object("window1")
        self.window.show()

if __name__ == "__main__":
    main = MyApp()
    Gtk.main()

对应的 Glade 文件(test_table.glade):

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.18.3 -->
<interface>
  <requires lib="gtk+" version="3.12"/>
  <object class="GtkListStore" id="liststore1">
    <columns>
      <!-- column-name column1 -->
      <column type="gchararray"/>
    </columns>
  </object>
  <object class="GtkWindow" id="window1">
    <property name="can_focus">False</property>
    <property name="resizable">False</property>
    <property name="default_height">300</property>
    <signal name="destroy" handler="on_window1_destroy" swapped="no"/>
    <child>
      <object class="GtkGrid" id="grid1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <child>
          <object class="GtkButton" id="button1">
            <property name="label" translatable="yes">add</property>
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="receives_default">True</property>
            <signal name="clicked" handler="button1_clicked" swapped="no"/>
          </object>
          <packing>
            <property name="left_attach">1</property>
            <property name="top_attach">0</property>
          </packing>
        </child>
        <child>
          <object class="GtkTreeView" id="treeview1">
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="model">liststore1</property>
            <child internal-child="selection">
              <object class="GtkTreeSelection" id="treeview-selection1"/>
            </child>
            <child>
              <object class="GtkTreeViewColumn" id="treeviewcolumn1">
                <property name="title" translatable="yes">test-column</property>
                <child>
                  <object class="GtkCellRendererText" id="cellrenderertext1"/>
                  <attributes>
                    <attribute name="text">0</attribute>
                  </attributes>
                </child>
              </object>
            </child>
          </object>
          <packing>
            <property name="left_attach">0</property>
            <property name="top_attach">0</property>
          </packing>
        </child>
      </object>
    </child>
  </object>
</interface>

【问题讨论】:

    标签: python gtk pygobject


    【解决方案1】:

    您不需要实现那个小部件,它已经存在并且它被称为Gtk.ScrolledWindow。滚动条行为可以是自动的(仅在内容超过分配的空间时显示)。

    这可以通过将父小部件添加到您通过 glade 添加的 GtkTreeView 来实现。

    如果您不希望按钮与窗口按比例展开,那么您应该将 GtkButton 垂直对齐设置为 Start(也在 glade 中)。

    以下是您的空地文件,并添加了Gtk.ScrolledWindow

    <?xml version="1.0" encoding="UTF-8"?>
    <!-- Generated with glade 3.19.0 -->
    <interface>
      <requires lib="gtk+" version="3.12"/>
      <object class="GtkListStore" id="liststore1">
        <columns>
          <!-- column-name column1 -->
          <column type="gchararray"/>
        </columns>
      </object>
      <object class="GtkWindow" id="window1">
        <property name="can_focus">False</property>
        <property name="default_height">300</property>
        <signal name="destroy" handler="on_window1_destroy" swapped="no"/>
        <child>
          <object class="GtkGrid" id="grid1">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="hexpand">True</property>
            <property name="vexpand">True</property>
            <child>
              <object class="GtkButton" id="button1">
                <property name="label" translatable="yes">add</property>
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="receives_default">True</property>
                <property name="halign">center</property>
                <property name="valign">start</property>
                <signal name="clicked" handler="button1_clicked" swapped="no"/>
              </object>
              <packing>
                <property name="left_attach">1</property>
                <property name="top_attach">0</property>
              </packing>
            </child>
            <child>
              <object class="GtkScrolledWindow" id="scrolledwindow1">
                <property name="visible">True</property>
                <property name="can_focus">True</property>
                <property name="hexpand">True</property>
                <property name="vexpand">True</property>
                <property name="shadow_type">in</property>
                <child>
                  <object class="GtkTreeView" id="treeview1">
                    <property name="visible">True</property>
                    <property name="can_focus">True</property>
                    <property name="hexpand">True</property>
                    <property name="vexpand">True</property>
                    <property name="model">liststore1</property>
                    <child internal-child="selection">
                      <object class="GtkTreeSelection" id="treeview-selection1"/>
                    </child>
                    <child>
                      <object class="GtkTreeViewColumn" id="treeviewcolumn1">
                        <property name="title" translatable="yes">test-column</property>
                        <child>
                          <object class="GtkCellRendererText" id="cellrenderertext1"/>
                          <attributes>
                            <attribute name="text">0</attribute>
                          </attributes>
                        </child>
                      </object>
                    </child>
                  </object>
                </child>
              </object>
              <packing>
                <property name="left_attach">0</property>
                <property name="top_attach">0</property>
              </packing>
            </child>
          </object>
        </child>
      </object>
    </interface>
    

    结果应该是这样的:

    【讨论】:

    • 我已经尝试将树视图包装到滚动窗口中,但没有设置 hexpandvexpand 的值,导致出现错误消息(“在 pixman_region32_init_rect 中:传递了无效的矩形” )。现在可以了。
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