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
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.

Platforms

Win32, x64.

See Also

Functions:

Class Members

Example

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT LBitmapWindow__RepaintExample(HWND hWndParent) 
{ 
   L_INT nRet; 
   LBitmapWindow  LeadBWnd ; 
   L_UINT         uZoomMode ; 
   RECT           rectZoom ; 
   nRet = LeadBWnd.Load(MAKE_IMAGE_PATH(TEXT("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 ; 
}

Help Version 19.0.2017.10.27
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