custom-controls

问题 I have designed my own text box in WPF by creating my own custom control template. However, I cannot seem to get the caret to show up. Here is my TextBox style: <Style TargetType="{x:Type TextBox}"> <Setter Property="SnapsToDevicePixels" Value="True"/> <Setter Property="OverridesDefaultStyle" Value="True"/> <Setter Property="KeyboardNavigation.TabNavigation" Value="None"/> <Setter Property="FocusVisualStyle" Value="{x:Null}"/> <Setter Property="AllowDrop" Value="True"/> <Setter Property=

问题 I have a WinForms gui application which has a number of areas to it which I'd like to custom-draw some graphics. These areas would contain controls and be resizeable. I'm currently thinking of inheriting from a TableLayoutPanel and handling onpaint messages. Does this sound like a good way to go or are there other/better options? 回答1: Any Windows Forms control has a Paint event, you don't have to derive your own class. But sure, you can, it helps partitioning the code. Just pick a base class

问题 Loooong time viewer, finally getting round to signing up here at StackOverflow! After a very long time searching for a way to do a scrolling background of a ViewGroup in Android, I've developed the following: public class SlidingDrawable extends Drawable implements Drawable.Callback { private static final String TAG = "SlidingDraw"; private static float STEP_SIZE = 1.0f; private BitmapDrawable mBitmap; private Context mContext; private float mPosX; private int mBitmapWidth; private Runnable

问题 How to hide a Custom LABEL added on the Directory Page Dialog of the NSIS installer. The LABEL is added using the Resource Hacker and its id is 1300 How to change the text of the LABEL conditionally? If user choses to install DEMO, then the label text should be "DEMO" , and if user choses to install UPDATE , then the label text should be "UPDATE" I have added 2 labels, now i am hiding and showing them accordingly.Label1 ID is 1300 , Label2 ID is 1301. # Occurs on Directory page show. Function

问题 I'm going to use a bunch of controls that each consist of a label and a text box. Is it a good idea to declare a custom control so that in encapsulates both the caption of the label and the input area of the text box as one? I can probably inherit and create something in C# but the point here is to get better at XAML so the approach of declaring such a thingy (not sure if it's called resource, template, style or anything else) by a markup is to be preferred (if not yet necessary). At the

问题 I am writing a custom control in WPF. The control have several properties that cause update of the control's logical tree. There are several methods of this form: private static void OnXXXPropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e) { ((MyControl)obj).RebuildTree(); } Suppose the RebuildTree() method is very complex and lenghty and if users changes several properties, this method is called several times causing application slowdown and hanging. I would like to

问题 I have a Custom Control: I don't want to get into specifics so for simplicity's sake i have 3 Dependency Properties : MyCustomControl (CS) : public class MyCustomControl : Control { DP Value1 DP InternalValue DP SelectedValue OnValue1Changed() { InternalValue = CalculateBasedOn1(); } static bool _isSetInternally; OnInternalValueChanged() { if(Condition()) { _isSetInternally = true; SelectedValue = e.NewValue; } else { Value1 = FixValue1(); } } OnSelectedValueChanged() { if(_isSetInternally) {

问题 As you can see in the code below I have created a custom control named Period that inherits from Listbox. In it I have declared a read-only dependancy property named 'Subjects'. When a single Period is placed on the WPF window everything runs fine. However, when I place more than one I get the error mentioned in the title. Here is the Period Class: Public Class Period Inherits System.Windows.Controls.ListBox '-------- PROPERTIES --------' Public ReadOnly Property Subjects() As

问题 I want to create UIButtons which are curved. For demo look at this image. I don't want to create the exact buttons, but they will have curve like this buttons. Is it possible to create such buttons in iOS? Thank you. 回答1: Have a look at OBShapedButton, its a UIButton subclass for non-rectangular shapes. 来源： https://stackoverflow.com/questions/16419151/how-to-create-curved-uibutton-for-iphone-application

问题 I'm trying to make custom RelativeLayout inside ScrollView. Now I have to copy this part of code in every place where I want to use it: <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="xxx" android:layout_height="yyy"> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_gravity="top" android:layout_margin="@dimen/card_margin" android