Creating a button (native Java code)

• Code for creating the Native Container control: This code calls a procedure available in native Java code for creating the view that will be displayed in the control.
  
  Android_AddButtonIntoNativeControl(MySelf.Value)
  Value corresponds to the view identifier.
• Java code of the global procedure to create the view:
  
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.Button;
  
  public static void Android_AddButtonIntoNativeControl(int nParentID)
  {
  Button button = new Button(getApplicationContext());
  button.setText("Hello world!");
  button.setOnClickListener(new View.OnClickListener()
  {
  @Override
  public void onClick(View v)
  {
  callProcedureWL("WLAndroid_DisplayInfo", "Hello world!");
  }
  });
  ViewGroup parent = (ViewGroup)getCurrentActivity().findViewById(nParentID);
  if(parent!= null)
  {
  parent.addView(button);
  }
  }
  In this example, the code can be divided into two sections:
  • the code for creating the view.
  • the code used to associate the view with the native Container control. This code must be adapted according to the type of created view (a button in this case) but it must always be found. This code uses the view identifier (nParentID) passed as parameter to the procedure. This code is as follows:
    
    ViewGroup parent = (ViewGroup)getCurrentActivity().findViewById(nParentID);
    if(parent!= null)
    {
    parent.addView(button);
    }

Creating a button (native Objective C code)

• Code for creating the Native Container control: This code calls a procedure available in native Objective C code for creating the view that will be displayed in the control. The button size is passed as parameter.
  
  IOS_AddButtonIntoNativeControl(MySelf.Value, 10, 10, 200, 60)
  Value corresponds to the view identifier.
• Objective C code of global procedure used to create the view:
  • IOS_AddButtonIntoNativeControl procedure:
    
    void IOS_AddButtonIntoNativeControl(void *pParent, int x, int y, int width, int height)
    {
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    SimpleClass * pclClass = [[SimpleClass alloc] init];
    [button addTarget:pclClass action:@selector(onClick:)
    forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:@"Hello world!" forState:UIControlStateNormal];
    button.frame = CGRectMake(x, y, width, height);
    [(UIView*)pParent addSubview:button];
    }
    In this example, the code can be divided into two sections:
    • the code for creating the view.
    • the code used to associate the view with the native Container control. This code must be adapted according to the type of created view (a button in this case) but it must always be found. This code uses the view identifier (pParent) passed as parameter to the procedure. This code is as follows:
      
      [(UIView*)pParent addSubview:button];
  • PlaceHolder procedure (used by the IOS_AddButtonIntoNativeControl procedure). CAUTION: This code must be placed BEFORE the code of global procedure IOS_AddButtonIntoNativeControl.
    
    #import "UIKit/UIKit.h"
    void PlaceHolder(){}
    @interface SimpleClass: NSObject
    @end
    @implementation SimpleClass
    
    - (void)onClick:(id)unused{
    [self performSelector:@selector(onClickDelayed:) withObject:unused afterDelay:0];
    }
    
    - (void)onClickDelayed:(id)unused{
    ClickOnNativeButton();
    }
    
    
    @end
• WLanguage code called by the Objective C code, used to display a message during a click on the button.
  
  PROCÉDURE WLIOS_DisplayInfo() , ObjC
  Info("Click!")