Re: Using different signals depending on which row of of a treeview

[Reuben Rissler <silrep emypeople net>]

On 04/29/2019 10:36 AM, Mike Martin via gtk-app-devel-list wrote:
> Has anyone done anything like this?
I haven't, but you are welcome to my simple Glade mockup:

<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.22.1 -->
<interface>
  <requires lib="gtk+" version="3.20"/>
  <object class="GtkListStore" id="combo_model">
    <columns>
      <!-- column-name id -->
      <column type="gchararray"/>
      <!-- column-name text -->
      <column type="gchararray"/>
    </columns>
    <data>
      <row>
        <col id="0" translatable="yes">1</col>
        <col id="1" translatable="yes">one</col>
      </row>
      <row>
        <col id="0" translatable="yes">2</col>
        <col id="1" translatable="yes">two</col>
      </row>
      <row>
        <col id="0" translatable="yes">3</col>
        <col id="1" translatable="yes">three</col>
      </row>
    </data>
  </object>
  <object class="GtkListStore" id="tree_model">
    <columns>
      <!-- column-name text -->
      <column type="gchararray"/>
      <!-- column-name text_visible -->
      <column type="gboolean"/>
      <!-- column-name combo_visible -->
      <column type="gboolean"/>
      <!-- column-name toggle_visible -->
      <column type="gboolean"/>
    </columns>
    <data>
      <row>
        <col id="0" translatable="yes">text</col>
        <col id="1">True</col>
        <col id="2">False</col>
        <col id="3">False</col>
      </row>
      <row>
        <col id="0" translatable="yes">combo</col>
        <col id="1">False</col>
        <col id="2">True</col>
        <col id="3">False</col>
      </row>
      <row>
        <col id="0" translatable="yes">toggle</col>
        <col id="1">False</col>
        <col id="2">False</col>
        <col id="3">True</col>
      </row>
    </data>
  </object>
  <object class="GtkWindow">
    <property name="can_focus">False</property>
    <child>
      <placeholder/>
    </child>
    <child>
      <object class="GtkTreeView">
        <property name="visible">True</property>
        <property name="can_focus">True</property>
        <property name="model">tree_model</property>
        <child internal-child="selection">
          <object class="GtkTreeSelection"/>
        </child>
        <child>
          <object class="GtkTreeViewColumn">
            <property name="title" translatable="yes">column</property>
            <child>
              <object class="GtkCellRendererText">
                <property name="editable">True</property>
              </object>
              <attributes>
                <attribute name="visible">1</attribute>
                <attribute name="text">0</attribute>
              </attributes>
            </child>
            <child>
              <object class="GtkCellRendererCombo">
                <property name="editable">True</property>
                <property name="model">combo_model</property>
                <property name="text_column">1</property>
              </object>
              <attributes>
                <attribute name="visible">2</attribute>
                <attribute name="text">0</attribute>
              </attributes>
            </child>
            <child>
              <object class="GtkCellRendererToggle"/>
              <attributes>
                <attribute name="visible">3</attribute>
                <attribute name="active">3</attribute>
              </attributes>
            </child>
          </object>
        </child>
      </object>
    </child>
  </object>
</interface>
> Basically the idea is that I push multiple renderers into a treeview column
> , then depending on the row hide/show the appropriate renderer (text,
> combo, toggle)
So go ahead and add three different renderers, and use row values to set 
them visible or invisible. In this case we have three different 
column/row cells to set each widget visible.
> Then call the appropriate signal_connect (edited, changed, toggled)
You can't really generate a signal on an invisible renderer, can you?
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