L_AnnSelectRect

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnSelectRect(hObject, pRect)

HANNOBJECT hObject;	handle to the annotation object
LPRECT pRect;	pointer to the Windows RECT structure

Selects all objects within the specified rectangle, relative to the window.

Parameter	Description
hObject	Handle to the annotation object.
pRect	Pointer to the Windows RECT structure. Coordinates are relative to the associated window's client area.

Returns

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

Comments

Selecting an object sets its selected property to TRUE.

Required DLLs and Libraries

LTANN

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.

Example

This example selects all objects in the top half of the client area, changes the background color of selected objects, and updates the display.

L_INT AnnSelectRectExample(HWND         hWnd, 
HANNOBJECT   hContainer)/* Container annotation object */ 
{ 
   L_INT nRet; 
   RECT     rClientArea;      /* Client area of the current window */ 
   RECT     rSelectionRect;   /* Bounding rectangle of selected objects */ 
   HDC      hWindowDC;        /* Device context of the current window */ 
   RECT     rAnnBounds;       /* Bounding rectangle when displaying the note */ 
   L_UINT   SelectCount;      /* Number of objects selected */ 
   L_TCHAR  szMessage[80];    /* Message buffer */ 
   /* Get the device context of the current window */ 
   hWindowDC = GetDC (hWnd); 
   /* Get the client area of the current window */ 
   GetClientRect(hWnd,&rClientArea); 
   /* Select the objects in the top half of the client area. Notice that 
   some adjustments are required to ensure that the specified rectangle encloses 
   all objects in the top half of the client area. */ 
   rSelectionRect.top      = rClientArea.top - 1; 
   rSelectionRect.left     = rClientArea.left -1; 
   rSelectionRect.right    = rClientArea.right + 2; 
   rSelectionRect.bottom   = (rClientArea.bottom / 2) + 2; 
   nRet = L_AnnSelectRect(hContainer, &rSelectionRect); 
   if(nRet != SUCCESS) 
      return nRet; 
   /* Set the background color of selected objects */ 
   nRet = L_AnnSetBackColor(hContainer, RGB(255,0,0), 
   ANNFLAG_SELECTED|ANNFLAG_RECURSE); 
   if(nRet != SUCCESS) 
      return nRet; 
   /* Get the bounding rectangle of selected objects */ 
   nRet = L_AnnGetSelectRect(hContainer, &rAnnBounds); 
   if(nRet != SUCCESS) 
      return nRet; 
   /* Get the window's device context */ 
   hWindowDC = GetDC (hWnd); 
   /* Display the change */ 
   nRet = L_AnnDraw(hWindowDC, &rAnnBounds, hContainer); 
   if(nRet != SUCCESS) 
      return nRet; 
   /* Remove the queued paint message */ 
   ValidateRect(hWnd, &rAnnBounds); 
   /* Get the number of objects selected */ 
   nRet = L_AnnGetSelectCount(hContainer, &SelectCount); 
   if(nRet != SUCCESS) 
      return nRet; 
   /* Display a message box with the result */ 
   wsprintf (szMessage, TEXT("%d objects selected"), SelectCount); 
   MessageBox (NULL, szMessage, TEXT("Notice"), MB_OK); 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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Redistributables/Files To Be Included With Your Application

Functions:	L_AnnGetSelectRect, L_AnnGetSelectCount, L_AnnSelectPoint, L_AnnGetType, L_AnnSetSelected, L_AnnGetSelected, L_AnnGetSelectItems
Topics:	Annotation Functions: Using Window Coordinates to Select Objects
	Annotation Functions: Object Information
	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program
	Displaying and Manipulating Annotation Objects