Label and edit Learning

1. Label

A label is a label used to display on the screen. The usage is as follows:

1. Create a traditional project
2. Define a CEikLable class in the. h file of the container.
   Class CEikLable; defined by forward
3. Add a class member variable CEikLable * iLabelTest;
4. Add the include reference in the. cpp file of the container # include <eiklabel. h>
5. Create the variable in the constructL method, as shown in the following code:
   

   ILabelTest = new (ELeave) CEikLabel; iLabelTest-> setcontainer1_wl (* this);/* set the font for the label by referencing eikenv. h. Therefore, you can obtain the CEikonEnv pointer through * CEikonEnv: Static (), and then call * its member method to obtain a const CFont pointer. ** other methods: Reference aknutils. h. You can get the system-defined font. * search for aknutils to find the global font. */const CFont * aFont = CEikonEnv: Static ()-> AnnotationFont (); iLabelTest-> SetFont (aFont); iLabelTest-> SetTextL (_ L ("label test"); iLabelTest-> SetUnderlining (ETrue); ILabelTest-> SetAlignment (EHRightVTop );

   The font is used here. You need to add the header file:
     # Include <eikenv. h> # include <gdi. h> # include <aknutils. h>

   # Include <gulalign. h>

   And corresponding library files
   Gdi. lib

1. In SetExtent is required for CEikLable in the SizeChanged method.
   ILabelTest-> SetExtent (TPoint (50, 50), iLabelTest-> MinimumSize ());
   If you try to remove this label, the label cannot be displayed. This label is used to set the position and size of the display.
2. CountComponentControls () and ComponentControl (TInt aIndex)
   Is used to return the total number of components in the container and the number
   Run the following code:
   

   // Counter // CsimplecontrolContainer: CountComponentControls () const // counter // TInt CsimplecontrolContainer: CountComponentControls () const {return 5; // return nbr of controls inside this container} // CsimplecontrolContainer: ComponentControl (TInt aIndex) const // component // CCoeControl * CsimplecontrolContainer: ComponentControl (TInt aIndex) const {switch (aIndex) {case 0: return iLabel; case 1: return iToDoLabel; case 2: return iLabelTest; case 3: return iDateEditor; case 4:// This is written as 5 during debugging, and the result is always incorrect because it takes a long time to locate the cause.Return iEdwin; default: return NULL ;}} //---------------------------------------------------------

3. Compile and run the program to see the effect.

2. Edit the input control

When the exercise editing input control is used, CEikDateEditor is used.
The required header file is: # include <eikmfne. h>
The LIB library file is eikctl. lib.
RSS file definition:

RESOURCE DATE_EDITOR r_my_date_edit {minDate = DATE {year = 1900 ;}; maxDate = DATE {year = 2100 ;}; }

The difference between creating a CEikDateEditor and a lable is that lable is not put in rss, while CEikDateEdit is put in Rss,
The code for creating CEikDateEditor is as follows:

TResourceReader read; iCoeEnv-> convert (read, R_MY_DATE_EDIT); iDateEditor = new (ELeave) CEikDateEditor; iDateEditor-> setcontainer1_wl (* this); iDateEditor-> ConstructFromResourceL (read ); CleanupStack: PopAndDestroy ();

TResourceReader is used in the Code. This class must reference the header file: barsread. h and the library file: bafl. lib.

For general input controls CEikEdwin and CEikDateEditor, except for the rss definition, the definition and creation of other controls are the same.