QCombobox单元自定义的问题

[坚持就会胜利来自未来]

我定义个qlistview，QCombobox设置view，使用函数setIndexWidget设置下拉框组合的Item，到后面完后，发现一个问题，就是QCombobox上有文本时，我点开下拉框（展开），我随便选中个单元（没按鼠标左键），没设置前不按住左键高光是不移动的，（设置）我在widget的mouseEnterEvent函数里设置了一旦鼠标进入就设置当前索引为这个widget的索引，（前面有点废话）我随便选中个单元后QCombobox的文本框就刷新原来的文本没了，我没按左键确定，debug发现我鼠标进入item的widget时，QCombobox也会触发事件，那些事件可能把原来的文字刷新走了。不像QQ，文本框只有点击下拉框的单元和打文本时匹配文本才会改变，我这个鼠标进入下拉框的单元就会把之前的清除，我看了别人类似的的自定义QCombobox也出现这样的情况，搞了半天都不行解决不了这个问题，如图所示，当我移动鼠标进入下拉框下拉视图的单元时，文本框自动清除了。

[坚持就会胜利来自未来]

果然发帖时间不对，都没人，我试试用禁止更新看看

[坚持就会胜利来自未来]

引用 2 楼 swwllx 的回复:

https://blog.csdn.net/ymc0329/article/details/7284498
你的描述能力不行啊 把没必要的删除了 然后在属性里面改
Assistant里面有解释

The QComboBox widget is a combined button and popup list.
A QComboBox provides a means of presenting a list of options to the user in a way that takes up the minimum amount of screen space.
A combobox is a selection widget that displays the current item, and can pop up a list of selectable items. A combobox may be editable, allowing the user to modify each item in the list.
Comboboxes can contain pixmaps as well as strings; the insertItem() and setItemText() functions are suitably overloaded. For editable comboboxes, the function clearEditText() is provided, to clear the displayed string without changing the combobox's contents.
There are two signals emitted if the current item of a combobox changes, currentIndexChanged() and activated(). currentIndexChanged() is always emitted regardless if the change was done programmatically or by user interaction, while activated() is only emitted when the change is caused by user interaction. The highlighted() signal is emitted when the user highlights an item in the combobox popup list. All three signals exist in two versions, one with a QString argument and one with an int argument. If the user selects or highlights a pixmap, only the int signals are emitted. Whenever the text of an editable combobox is changed the editTextChanged() signal is emitted.
When the user enters a new string in an editable combobox, the widget may or may not insert it, and it can insert it in several locations. The default policy is InsertAtBottom but you can change this using setInsertPolicy().
It is possible to constrain the input to an editable combobox using QValidator; see setValidator(). By default, any input is accepted.
A combobox can be populated using the insert functions, insertItem() and insertItems() for example. Items can be changed with setItemText(). An item can be removed with removeItem() and all items can be removed with clear(). The text of the current item is returned by currentText(), and the text of a numbered item is returned with text(). The current item can be set with setCurrentIndex(). The number of items in the combobox is returned by count(); the maximum number of items can be set with setMaxCount(). You can allow editing using setEditable(). For editable comboboxes you can set auto-completion using setCompleter() and whether or not the user can add duplicates is set with setDuplicatesEnabled().
QComboBox uses the model/view framework for its popup list and to store its items. By default a QStandardItemModel stores the items and a QListView subclass displays the popuplist. You can access the model and view directly (with model() and view()), but QComboBox also provides functions to set and get item data (e.g., setItemData() and itemText()). You can also set a new model and view (with setModel() and setView()). For the text and icon in the combobox label, the data in the model that has the Qt::DisplayRole and Qt::DecorationRole is used. Note that you cannot alter the SelectionMode of the view(), e.g., by using setSelectionMode().

谢谢，因为看了这段话，说到setitemtext等函数，我找到了部分原因，原来要设置QStandardItem的text就不会出现combobox的编辑框会清除，但是会变为当前索引单元的文本（不管编辑框里是什么），我在看看是什么导致的。

[三岁、就很帅]

https://blog.csdn.net/ymc0329/article/details/7284498
你的描述能力不行啊 把没必要的删除了 然后在属性里面改
Assistant里面有解释

The QComboBox widget is a combined button and popup list.
A QComboBox provides a means of presenting a list of options to the user in a way that takes up the minimum amount of screen space.
A combobox is a selection widget that displays the current item, and can pop up a list of selectable items. A combobox may be editable, allowing the user to modify each item in the list.
Comboboxes can contain pixmaps as well as strings; the insertItem() and setItemText() functions are suitably overloaded. For editable comboboxes, the function clearEditText() is provided, to clear the displayed string without changing the combobox's contents.
There are two signals emitted if the current item of a combobox changes, currentIndexChanged() and activated(). currentIndexChanged() is always emitted regardless if the change was done programmatically or by user interaction, while activated() is only emitted when the change is caused by user interaction. The highlighted() signal is emitted when the user highlights an item in the combobox popup list. All three signals exist in two versions, one with a QString argument and one with an int argument. If the user selects or highlights a pixmap, only the int signals are emitted. Whenever the text of an editable combobox is changed the editTextChanged() signal is emitted.
When the user enters a new string in an editable combobox, the widget may or may not insert it, and it can insert it in several locations. The default policy is InsertAtBottom but you can change this using setInsertPolicy().
It is possible to constrain the input to an editable combobox using QValidator; see setValidator(). By default, any input is accepted.
A combobox can be populated using the insert functions, insertItem() and insertItems() for example. Items can be changed with setItemText(). An item can be removed with removeItem() and all items can be removed with clear(). The text of the current item is returned by currentText(), and the text of a numbered item is returned with text(). The current item can be set with setCurrentIndex(). The number of items in the combobox is returned by count(); the maximum number of items can be set with setMaxCount(). You can allow editing using setEditable(). For editable comboboxes you can set auto-completion using setCompleter() and whether or not the user can add duplicates is set with setDuplicatesEnabled().
QComboBox uses the model/view framework for its popup list and to store its items. By default a QStandardItemModel stores the items and a QListView subclass displays the popuplist. You can access the model and view directly (with model() and view()), but QComboBox also provides functions to set and get item data (e.g., setItemData() and itemText()). You can also set a new model and view (with setModel() and setView()). For the text and icon in the combobox label, the data in the model that has the Qt::DisplayRole and Qt::DecorationRole is used. Note that you cannot alter the SelectionMode of the view(), e.g., by using setSelectionMode().