Question

我试图让QtCheckBox启用三态时在复选框中绘制一个X，当它的状态是偏的时候。我目前正在让Qt处理这种风格，因此它与操作系统相匹配，我希望保持这种方式并且只改变复选框的绘制方式。

我一直试图通过覆盖Qt使用的QStyle来做到这一点。我测试了Qt默认使用的样式：

>>> app = QtGui.QApplication()
>>> type(app.style())
PyQt4.QtGui.QCommonStyle

但是当我尝试运行app.setStyle(QtGui.QCommonStyle())时，GUI会发生变化，最明显的是复选标记会从QCheckBox es消失。

我查了QCommonStyle，根据文档，它只绘制了所有样式共有的元素。

所以我有两个问题：

当type(app.style())显示所使用的样式实际上不是QCommonStyle时，为什么QCommonStyle会返回public class TodoAddActivity extends AppCompatActivity { // Variables private Context mContext; private Realm realm; private TodoModel task; private Button button; private EditText mTaskNameEditText; private EditText mTaskDateEditText; private EditText mTaskTimeEditText; String time; //private static List<TodoModel> tasks; private RealmResults<TodoModel> results; public final static String INTENT_KEY_ID = "taskId"; public final static String DATE_FORMAT = "dd/MMM/yy"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView( R.layout.todo_add_layout); mContext = this; realm=Realm.getDefaultInstance(); setUpUIViews(); showData(); final String taskId = getIntent().getStringExtra(INTENT_KEY_ID); button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (taskId == null) addTask(); else editTask(taskId); } }); mTaskDateEditText.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { datePicker(view); } }); mTaskDateEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View view, boolean b) { if (b) datePicker(view); } }); mTaskTimeEditText.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View view) { timePicker( view ); } } ); mTaskTimeEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View view, boolean b) { if (b) timePicker( view ); } }); if (taskId != null) { fillTask(realm.where(TodoModel.class).equalTo("id", taskId).findFirst()); button.setText("EDIT"); } } private void setUpUIViews() { button = (Button) findViewById(R.id.activity_add_task_bt_add); mTaskNameEditText = (EditText) findViewById(R.id.activity_add_task_et_name); mTaskDateEditText = (EditText) findViewById(R.id.activity_add_task_et_date); mTaskTimeEditText = (EditText) findViewById(R.id.activity_add_task_et_time); } public void showData(){ //tasks = new ArrayList<>(); //error //RealmResults<TodoModel> tasksResult = realm.where(TodoModel.class).findAll(); //for (TodoModel task : tasksResult) // tasks.add(task); //error*/ results = realm.where(TodoModel.class).findAll(); } protected TodoModel getTask(int position) { return results.get(position); } private void fillTask(TodoModel task) { mTaskNameEditText.setText(task.getName()); SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT); mTaskDateEditText.setText(sdf.format(task.getDate())); mTaskTimeEditText.setText(task.getTime()); } private void addTask() { String taskName = mTaskNameEditText.getText().toString(); String taskDate = mTaskDateEditText.getText().toString(); String taskTime = mTaskTimeEditText.getText().toString(); if (taskName.length() == 0 || taskName.equals("")) { mTaskNameEditText.setError("Should be filled"); return; } if (taskDate.length() == 0 || taskDate.equals("")) { mTaskDateEditText.setError("Should be filled"); return; } TodoModel task = getTask(taskName, taskDate,taskTime); if (task == null) { mTaskDateEditText.setError("Not a correct date"); return; } task.setDone(false); addTask(task); setResult(RESULT_OK); finish(); } protected void addTask(TodoModel task) { realm.beginTransaction(); TodoModel newTask = realm.createObject(TodoModel.class, UUID.randomUUID().toString()); newTask.setName(task.getName()); newTask.setDate(task.getDate()); newTask.setTime(task.getTime()); //realm.copyToRealmOrUpdate(newTask); realm.commitTransaction(); //realm.close(); } private void editTask(String taskId) { String taskName = mTaskNameEditText.getText().toString(); String taskDate = mTaskDateEditText.getText().toString(); String taskTime = mTaskTimeEditText.getText().toString(); if (taskName.length() == 0 || taskName.equals("")) { mTaskNameEditText.setError("Should be filled"); return; } if (taskDate.length() == 0 || taskDate.equals("")) { mTaskDateEditText.setError("Should be filled"); return; } if (taskTime.length() == 0 || taskTime.equals("")) { mTaskTimeEditText.setError("Should be filled"); return; } TodoModel task = getTask(taskName, taskDate,taskTime); if (task == null) { mTaskDateEditText.setError("Not a correct date"); return; } task.setId(taskId); updateTask(task); setResult(RESULT_OK); finish(); } protected void updateTask(TodoModel task) { realm.beginTransaction(); TodoModel newTask = realm.where(TodoModel.class).equalTo("id", task.getId()).findFirst(); newTask.setDate(task.getDate()); newTask.setDone(task.isDone()); newTask.setName(task.getName()); realm.commitTransaction(); } private void datePicker(final View view) { Calendar currentTime = Calendar.getInstance(); int year = currentTime.get(Calendar.YEAR); int monthOfYear = currentTime.get(Calendar.MONTH); int dayOfMonth = currentTime.get(Calendar.DAY_OF_MONTH); DatePickerDialog mDatePickerDialog = new DatePickerDialog(mContext, 0, new DatePickerDialog.OnDateSetListener() { @Override public void onDateSet(DatePicker datePicker, int year, int monthOfYear, int dayOfMonth) { Calendar calendar = Calendar.getInstance(); calendar.set(year, monthOfYear, dayOfMonth); SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT); ((EditText) view).setText(sdf.format(calendar.getTime())); } }, year, monthOfYear, dayOfMonth); mDatePickerDialog.setTitle("Select Time"); mDatePickerDialog.show(); } private void timePicker(final View view) { Calendar mcurrentTime = Calendar.getInstance(); int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY); int minute = mcurrentTime.get(Calendar.MINUTE); TimePickerDialog mTimePicker; mTimePicker = new TimePickerDialog(mContext,0, new TimePickerDialog.OnTimeSetListener() { @Override public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) { mTaskTimeEditText.setText( selectedHour + ":" + selectedMinute); } }, hour, minute, true);//Yes 24 hour time mTimePicker.setTitle("Select Time"); mTimePicker.show(); } private TodoModel getTask(String name, String dateString,String time) { TodoModel task = new TodoModel(); try { SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT); task.setName(name); task.setDate(sdf.parse(dateString)); task.setTime(time ); task.setDone(false); return task; } catch (ParseException e) { e.printStackTrace(); return null; } } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) onBackPressed(); return super.onOptionsItemSelected(item); } }？
我如何实际获得Qt使用的样式？

我正在使用PyQt4。

Answer 1

为什么type（app.style（））返回QCommonStyle，当它出现时使用的样式实际上不是QCommonStyle？

像样式一样使用的类通常继承QCommonStyle，例如在我的例子中我有以下样式：

for key in QtGui.QStyleFactory.keys():
    st = QtGui.QStyleFactory.create(key)
    print(key, st.metaObject().className(), type(app.style()))

输出：

Adwaita-Dark Adwaita::Style   <class 'PyQt4.QtGui.QCommonStyle'>
Adwaita      Adwaita::Style   <class 'PyQt4.QtGui.QCommonStyle'>
Breeze       Breeze::Style    <class 'PyQt4.QtGui.QCommonStyle'>
bb10dark     QBB10DarkStyle   <class 'PyQt4.QtGui.QCommonStyle'>
bb10bright   QBB10BrightStyle <class 'PyQt4.QtGui.QCommonStyle'>
cleanlooks   QCleanlooksStyle <class 'PyQt4.QtGui.QCommonStyle'>
gtk2         QGtkStyle        <class 'PyQt4.QtGui.QCommonStyle'>
cde          QCDEStyle        <class 'PyQt4.QtGui.QCommonStyle'>
motif        QMotifStyle      <class 'PyQt4.QtGui.QCommonStyle'>
plastique    QPlastiqueStyle  <class 'PyQt4.QtGui.QCommonStyle'>
qt5ct-style  Qt5CTProxyStyle  <class 'PyQt4.QtGui.QCommonStyle'>
QtCurve      QtCurve::Style   <class 'PyQt4.QtGui.QCommonStyle'>
Windows      QWindowsStyle    <class 'PyQt4.QtGui.QCommonStyle'>
Fusion       QFusionStyle     <class 'PyQt4.QtGui.QCommonStyle'>

正如我们观察到的那样都属于那种类型。

我如何实际获得Qt使用的样式？

上一部分已经回答：

print(QtGui.QApplication.style().metaObject().className())

就我而言：

Adwaita::Style

修改PyQt4中的系统样式

1 个答案: