LBitmapWindow::Repaint

#include "ltwrappr.h"

L_VOID LBitmapWindow::Repaint(pRect=NULL)

LPRECT pRect;

/* pointer to a rectangle structure */

Repaints the class object's window. Only the specified rectangle will be repainted.

Parameter	Description
pRect	Pointer to a rectangle structure that describes the rectangle to be repainted. Pass NULL to repaint the entire window.

Returns

None

Required DLLs and Libraries

LTDIS
LTDLG
LTEFX
LTFIL
LTIMG
LTISI
LTSCR
LTTWN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

See Also

Functions:

Class Members

Example

L_INT LBitmapWindow__RepaintExample(HWND hWndParent)
{
   L_INT nRet;
   LBitmapWindow  LeadBWnd ;
   L_UINT         uZoomMode ;
   RECT           rectZoom ;
   
   nRet = LeadBWnd.Load(TEXT("%UserProfile%\\My Documents\\LEADTOOLS Images\\image1.cmp"));
   if (nRet == SUCCESS)
   {
      if (LeadBWnd.CreateWnd(hWndParent, TRUE, 0, 0, 100, 100) == NULL)
         return 0;
   
      if (LeadBWnd.IsAutoPaintEnabled() == FALSE)
      {
         // stop paint
         LeadBWnd.EnableAutoPaint(TRUE) ;
      }
      /* repaint the image, but paint stopped, 
         then the Repaint will not paint the image */
      LeadBWnd.Repaint() ;
      // start paint with new updates
      LeadBWnd.EnableAutoPaint(FALSE) ;
      // repaint the image
      LeadBWnd.Repaint() ;
      // get zoom mode for current bitmap window 
      uZoomMode = LeadBWnd.GetZoomMode();
      if (uZoomMode != ZOOM_FACTOR)
      {
         uZoomMode = ZOOM_FITHEIGHT ;
         // change the zoom mode for current bitmap window 
         nRet =LeadBWnd.SetZoomMode(uZoomMode) ;
         if(nRet !=SUCCESS)
            return nRet;
      }
      //...
      //...
      if (LeadBWnd.GetHorzLineStep() != 2)
         LeadBWnd.SetHorzLineStep(2) ;
      if (LeadBWnd.GetVertLineStep() != 2)
         LeadBWnd.SetVertLineStep(2) ;
      // check if auto scroll bars is enable or not 
      if (LeadBWnd.IsAutoScrollEnabled() == FALSE)
         LeadBWnd.EnableAutoScroll(TRUE) ;
      // fill zoom rect to use it in ZoomToRect 
      rectZoom.left  = 50 ;
      rectZoom.top   = 50 ;
      rectZoom.right = 75 ;
      rectZoom.bottom= 75 ;
      nRet =LeadBWnd.ZoomToRect(rectZoom) ;
      if(nRet !=SUCCESS)
         return nRet;
      //...
      //...
      // use ScrollBars (Horizontal & Vertical)
      
      // 10 = the distance to scroll the bitmap horizontally.
      // 20 = the distance to scroll the bitmap horizontally.
      LeadBWnd.ScrollBy( 10, 20) ;
      
      // go to 10 position on horizontal scroll in bitmap
      // go to 20 position on vertical scroll in bitmap
      LeadBWnd.ScrollTo( 10, 20) ;
   }
   else
      return nRet;
   return SUCCESS ;
}