overriding

Override OnResume() method of all activities Android

由 不问归期 提交于 2019-12-06 21:32:06
问题 I have and app with more than 10 activities and I would like override the method onResume() with the same code in all of them. I know that I can override this method in each activity, but I'm looking for an efficient solution. Moreover I would like inside this onResume show a message depending what activity is coming from, for example: if you are in the MainActivity I want that this common onResume detects that is coming from this activity and show I'm coming from MainActivity Thank you. 回答1:

Why can't I use virtual/override on class variables as I can on methods?

由 浪子不回头ぞ 提交于 2019-12-06 18:31:26
问题 In the following example I am able to create a virtual method Show() in the inherited class and then override it in the inheriting class. I want to do the same thing with the protected class variable prefix but I get the error: The modifier 'virtual' is not valid for this item But since I can't define this variable as virtual/override in my classes, I get the compiler warning : TestOverride234355.SecondaryTransaction.prefix' hides inherited member 'TestOverride234355.Transaction.prefix'. Use

C++11 Delete overridden Method

由 谁说我不能喝 提交于 2019-12-06 17:49:54
问题 Preface: This is a question about best practices regarding a new meaning of the delete operator introduced with C++11 when applied to a child class overriding an inherited parent's virtual method. Background: Per the standard, the first use case cited is to explicitly disallow calling functions for certain types where conversions would otherwise be implicit such as the example from §8.4.3 of the latest C++11 standard draft: struct sometype { sometype() = delete; // OK, but redundant some_type

Create a custom listViewItem class to store additional hidden info - VB .Net

由 我的未来我决定 提交于 2019-12-06 17:38:28
I want to store additional information about a listview item using a custom class, but I can't seem to get it to work. I'm currently using this code to accomplish something similar using a listbox item. I just want to do the same thing with a listview. Public Class myListboxItem Public id As String Public rootFolder As String Public name As String Public info() As String Public Text As String Public Overrides Function ToString() As String Return Me.Text End Function End Class I set the properties like this Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)

How do you call a method for an Objective-C object's superclass from elsewhere?

由 六眼飞鱼酱① 提交于 2019-12-06 17:28:00
问题 If you're implementing a subclass, you can, within your implementation, explicitly call the superclass's method, even if you've overridden that method, i.e.: [self overriddenMethod]; //calls the subclass's method [super overriddenMethod]; //calls the superclass's method What if you want to call the superclass's method from somewhere outside the subclass's implementation, i.e.: [[object super] overriddenMethod]; //crashes Is this even possible? And by extension, is it possible to go up more

Is there something in c# similar to java's @override annotation?

由 ↘锁芯ラ 提交于 2019-12-06 17:16:28
问题 I've used the @Override in java and has come in quite handy. Is there anything similar in c#? 回答1: The C# compiler provides compile-time checking for method overrides, including checking if the method is actually overriding as you intended. You can indicate that a method should be overridden using the .NET override keyword. 回答2: In C#, you must use the override keyword to override functions. If you use override without a matching virtual or abstract base function, you'll get a compiler error.

QWidget keyPressEvent override

由 柔情痞子 提交于 2019-12-06 17:01:19
问题 I'm trying for half an eternity now overriding QWidgets keyPressEvent function in QT but it just won't work. I've to say i am new to CPP, but I know ObjC and standard C. My problem looks like this: class QSGameBoard : public QWidget { Q_OBJECT public: QSGameBoard(QWidget *p, int w, int h, QGraphicsScene *s); signals: void keyCaught(QKeyEvent *e); protected: virtual void keyPressEvent(QKeyEvent *event); }; QSGameBoard is my QWidget subclass and i need to override the keyPressEvent and fire a

WPF TextBox TextProperty metadata override

由 一笑奈何 提交于 2019-12-06 15:06:57
How to override the TextProperty Metadata to set the UpdateSourceTrigger.PropertyChanged by default while using the functionality from the base TextBox Class TextBox.OnTextPropertyChanged TextBox.CoerceText methods, when both mentioned are private ? public class MyTextBox : System.Windows.Controls.TextBox { static MyTextBox() { TextProperty.OverrideMetadata(typeof(TextBox), new FrameworkPropertyMetadata( string.Empty, FrameworkPropertyMetadataOptions.Journal | FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, new PropertyChangedCallback(TextBox.OnTextPropertyChanged), new

How to override method of BaseModel (openerp/models.py) in odoo v9?

由 拈花ヽ惹草 提交于 2019-12-06 14:16:06
I want to override a function called 'user_has_groups' in the class from the file openerp/models.py (line no 1365) I tried the code from this post and this question from openerp.models import BaseModel def my_user_has_groups(self, cr, uid, groups, context=None): #my code BaseModel.user_has_groups = my_user_has_groups But it results the following error. TypeError: my_user_has_groups() takes at least 4 arguments (2 given) and also i tried this line BaseModel.user_has_groups = lambda cr, uid, groups, context: my_user_has_groups(cr, uid, groups, context) It results the following error

C# class using subclass does not implement inherited abstract member error

由 萝らか妹 提交于 2019-12-06 14:07:05
Here's the c# code I'm trying to compile Fairly simple, testDMO that inherits from testDMOBase Then test that inherits from testBase public abstract class testDMOBase { } public class testDMO : testDMOBase { } public abstract class testBase { abstract protected void LoadCRUD(testDMOBase dmo); } public class test : testBase { override protected void LoadCRUD(testDMO dmo) { } } I'm getting the following errors: 'test' does not implement inherited abstract member 'testBase.LoadCRUD(testDMOBase)' 'test.LoadCRUD(testDMO)': no suitable method found to override Shouldn't the use of a subclass be ok
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