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LImageViewerCell::Create

Summary

Creates a cell, which is a window that can hold a single image or a list of images.

Syntax

#include "ltwrappr.h"

L_INT LImageViewerCell::Create (hWndParent, uFlags);

Parameters

HWND hWndParent

Handle to the parent or owner window of the container window being created.

L_UINT uFlags

Reserved for future, must be zero.

Returns

Value	Meaning
SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

This function will create a window that will hold the cell. This cell window serves as the "image viewer cell".

Each container has numerous characteristics, such as the number of rows, the number of columns, border colors, background colors, cursors, etc. that can be set programmatically using LImageViewerCell::SetCellProperties. To get the current characteristics of a specific container, call LImageViewerCell::GetCellProperties.

A container can also have certain actions, either standard or user-defined, associated with it. These actions are applied either through the mouse or through keystroke combinations. For more information, refer to Applying Actions.

The maximum number of rows allowed is 8. The maximum number of columns is 8.

When the container created by this function is no longer needed, free the container and any associated memory by calling LImageViewerCell::Destroy. For every call to LImageViewerCell::Create there must be a call to LImageViewerCell::Destroy.

Required DLLs and Libraries

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

Example

#define RECT_HEIGHT(lpRect)      ((lpRect)->bottom - (lpRect)->top) 
#define SELECT_FONT(hDC, hFont)  ((HFONT) SelectObject((hDC), (HGDIOBJ)(HFONT)(hFont))) 
 
LImageViewer  gMyImageViewer; 
 
class MyLImageViewerChild :public LImageViewerCell 
{ 
   L_INT ActionCallBack(HBITMAPLIST * phBitmapList,  
      L_UINT uCount,  
      L_INT nAction,  
      L_UINT uMessage,  
      WPARAM wParam,  
      POINT * ptMousePos);  
   virtual L_INT TagCallBack( HWND hCellWnd, 
      L_INT nCellIndex, 
      HDC hDC, 
      RECT * lpRect); 
}; 
 
L_INT MyLImageViewerChild::TagCallBack(HWND /*hCellWnd*/, L_INT nCellIndex, HDC hDC, RECT * lpRect)  
{ 
   if (nCellIndex == 0)  
   { 
      // draw an overlay with italic font 
      static LOGFONT lf;  
      HFONT hFont, hOldFont;  
      lf.lfHeight = RECT_HEIGHT(lpRect);  
      lf.lfItalic = TRUE;  
      wsprintf(lf.lfFaceName, TEXT("Times new Roman\0")); 
      SetTextAlign(hDC, TA_BOTTOM | TA_RIGHT);  
      SetTextColor(hDC, RGB(255, 255, 255));  
      hFont = CreateFontIndirect(&lf);  
      hOldFont = SELECT_FONT(hDC, hFont);  
      TextOut(hDC, lpRect->right, lpRect->bottom, TEXT("Owner Text"), 10);  
   } 
   return TRUE;  
} 
 
L_INT MyLImageViewerChild::ActionCallBack(HBITMAPLIST * phBitmapList, L_UINT uCount, 
                                          L_INT nAction, L_UINT uMessage, WPARAM wParam, 
                                          POINT * ptMousePos)  
{ 
   UNREFERENCED_PARAMETER(phBitmapList); 
   UNREFERENCED_PARAMETER(uCount); 
   UNREFERENCED_PARAMETER(nAction); 
   UNREFERENCED_PARAMETER(wParam); 
   UNREFERENCED_PARAMETER(ptMousePos); 
   L_INT    nRet = 0 ; 
   L_UINT   uRow = 0 ; 
   switch(uMessage)  
   { 
   case WM_LBUTTONDOWN:  
      { 
         // The user clicks the left button so the container scroll bar will scroll one step down 
         nRet = gMyImageViewer.GetFirstVisibleRow(&uRow, 0);  
         nRet = gMyImageViewer.SetFirstVisibleRow(uRow + 1, 0);  
      } 
      break;  
   case WM_RBUTTONDOWN:  
      { 
         // The user clicks the right button so the container scroll bar will scroll one step up.  
         nRet = gMyImageViewer.GetFirstVisibleRow(&uRow, 0);  
         nRet = gMyImageViewer.SetFirstVisibleRow(uRow - 1, 0);  
      } 
      break;  
   } 
   return TRUE;  
} 
 
// This function will create a container, add cells with image lists, and add some tags.  
// Then the function will add some actions to the container.  
L_INT MyLImageViewer_CreateExample(CWnd* pwndParent, LImageViewer& ImageViewer, LBitmapList* pBitmapList) 
{ 
   DISPCONTAINERPROPERTIES DispContainerProp;  
   DISPCELLPROPERTIES      DispCellProp;  
   RECT                    rcRect;  
   L_INT                   nRet;  
 
   // Create a container equal in size to its parent window.  
   pwndParent->GetClientRect(&rcRect);  
   nRet = ImageViewer.Create(pwndParent->GetSafeHwnd(), &rcRect, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   gMyImageViewer = ImageViewer; 
 
   // load a bitmap list.  
   nRet = pBitmapList->Load(MAKE_IMAGE_PATH(TEXT("image1.dcm")),0, ORDER_BGRORGRAY);  
 
   // if the image is corrupted or not found the program will destroy the container and terminate 
   if (nRet != SUCCESS)  
   { 
      ImageViewer.Destroy(0);  
      return nRet;  
   } 
 
   // Insert a new cell at the end of the container cell queue.  
   MyLImageViewerChild * ImageViewerCell = new MyLImageViewerChild(); 
   ImageViewerCell->Create(ImageViewer.GetWindowHandle(0), 0); 
   ImageViewerCell->EnableActionCallBack(TRUE) ;  
   ImageViewerCell->EnableTagCallBack(TRUE) ;  
   ImageViewer.InsertCell(ImageViewerCell->GetWindowHandle(0), -1, 0);  
 
   // Attach the loaded bitmaplist to the newly inserted cell.  
   nRet = ImageViewerCell->SetCellBitmapList(pBitmapList->GetHandle(),TRUE,0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   // Add some tags to the cell 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_TOPLEFT     , 0, TEXT("Image1 Text 1"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(1, DISPWIN_ALIGN_TOPLEFT     , 0, TEXT("Image1 Text 2"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(2, DISPWIN_ALIGN_TOPLEFT     , 0, TEXT("Image1 Text 3"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(3, DISPWIN_ALIGN_TOPLEFT     , 0, TEXT("Image1 Text 4"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(1, DISPWIN_ALIGN_LEFTCENTER  , 0, TEXT("L"),0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_BOTTOMLEFT  , 0, TEXT("Image1 Text 5"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_TOPCENTER   , 0, TEXT("Top"),0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_BOTTOMCENTER, 0, TEXT("Bottom"),0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_TOPRIGHT    , 0, TEXT("Image1 Text 6"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_RIGHTCENTER , 0, TEXT("R"),0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(8, DISPWIN_ALIGN_TOPLEFT     , DISPWIN_TYPE_FRAME,NULL, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_BOTTOMRIGHT , DISPWIN_TYPE_OWNERDRAW,NULL, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   pBitmapList->SetHandle(NULL,NULL,FALSE);  
   // load another bitmap list 
   nRet = pBitmapList->Load(MAKE_IMAGE_PATH(TEXT("mr.dcm")), 
      0, ORDER_BGRORGRAY);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   // insert a new cell at the end of the container queue.  
   ImageViewerCell = new MyLImageViewerChild(); 
   ImageViewerCell->Create(ImageViewer.GetWindowHandle(0), 0); 
   ImageViewerCell->EnableActionCallBack(TRUE) ;  
   ImageViewerCell->EnableTagCallBack(TRUE) ;  
   ImageViewer.InsertCell(ImageViewerCell->GetWindowHandle(0), -1, 0);  
 
   // Attach the loaded bitmap list to the newly inserted cell.  
   nRet = ImageViewerCell->SetCellBitmapList(pBitmapList->GetHandle(),TRUE,0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   // Add some tags to the cell 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_TOPLEFT     , 0, TEXT("Image3 Text 1"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(2, DISPWIN_ALIGN_TOPLEFT     , 0, TEXT("Image3 Text 2"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(4, DISPWIN_ALIGN_TOPLEFT     , 0, TEXT("Image3 Text 3"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(6, DISPWIN_ALIGN_TOPLEFT     , 0, TEXT("Image3 Text 4"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(1, DISPWIN_ALIGN_LEFTCENTER  , 0, TEXT("Image3 Text 5"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_BOTTOMLEFT  , 0, TEXT("Image3 Text 6"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_TOPCENTER   , 0, TEXT("Image3 Text 7"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_BOTTOMCENTER, 0, TEXT("Image3 Text 8"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_TOPRIGHT    , 0, TEXT("Image3 Text 9"), 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_RIGHTCENTER , 0, TEXT("R"),0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(7, DISPWIN_ALIGN_TOPLEFT     , DISPWIN_TYPE_SCALE,NULL, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetCellTag(0, DISPWIN_ALIGN_BOTTOMRIGHT, DISPWIN_TYPE_OWNERDRAW,NULL, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   // Change the number of rows and columns to show all the inserted cells.  
   DispContainerProp.uStructSize = sizeof(DISPCONTAINERPROPERTIES);  
   DispContainerProp.uNumCols = 2;  
   DispContainerProp.uNumRows = 1;  
   DispContainerProp.uMask = DCPF_NUMROWS | DCPF_NUMCOLS;  
   nRet = ImageViewer.SetProperties(&DispContainerProp, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   // Change the number of sub-rows and sub-columns.  
   memset(&DispCellProp,0,sizeof(DISPCELLPROPERTIES)); 
   DispCellProp.uStructSize = sizeof(DISPCELLPROPERTIES);  
   DispCellProp.uNumCols = 3;  
   DispCellProp.uNumRows = 3;  
   nRet = ImageViewerCell->SetCellProperties(&DispCellProp, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   pBitmapList->SetHandle(NULL,NULL,FALSE);  
 
   // Add some actions to the container.  
   nRet = ImageViewerCell->AddAction(110, 0);  
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetAction(110, CONTAINER_MOUSE_BUTTON_LEFT,  DCACTION_ACTIVEONLY); 
 
   if(nRet != SUCCESS) 
      return nRet; 
 
   nRet = ImageViewerCell->SetAction(110, CONTAINER_MOUSE_BUTTON_RIGHT, DCACTION_ACTIVEONLY); 
 
   if(nRet != SUCCESS) 
      return nRet; 
 
   return SUCCESS; 
}