L_VecDlgScale

#include "lvdlg.h"

L_LVDLG_API L_INT L_VecDlgScale(hWnd, pVector, pScale, pOrigin, dwFlags, pfnCallback, pUserData)

HWND hWnd;

/* handle of the window that owns the dialog */

pVECTORHANDLE pVector;

/* pointer to a vector handle */

pVECTORPOINT pScale;

/* pointer to a VECTORPOINT structure */

const pVECTORPOINT pOrigin;

/* pointer to a VECTORPOINT structure */

L_UINT32 dwFlags;

/* user interface flags for dialog */

LVCOMMDLGHELPCB pfnCallback;

/* pointer to a help callback function */

L_VOID * pUserData;

/* pointer to more parameters for the callback */

Brings up the Vector Scale dialog.

Parameter

Description

hWnd

Handle of the window that owns the dialog.

pVector

Pointer to the vector handle that references the vector image to be scaled.

pScale

Pointer to a VECTORPOINT structure that contains scale values. The values present in pScale when the function is called are used to initialize the dialog. If this parameter is NULL when the function is called, the values used to initialize the dialog will come from the vector handle. When this function returns, this parameter is updated with the values entered through the dialog.

pOrigin

Pointer to a VECTORPOINT structure that contains the origin of the scale. (The point about which the scaling occurs.) If pOrigin is not NULL, scaling occurs around this point. If pOrigin is NULL, the center of scaling is the accumulative center of the objects to be scaled.

dwFlags

User interface flags for dialog. Determines the layout and action of the dialog.

 

Value

Meaning

 

VECTOR_DLG_AUTOPROCESS

[0x80000000] Process the image on OK.

 

VECTOR_DLG_SHOWPREVIEW

[0x40000000] Show preview of image in dialog.

 

VECTOR_DLG_SELECTED_ONLY

[0x00000001] Scale only selected objects.

 

VECTOR_DLG_ENABLE_HELPBUTTON

[0x00000002] Enable Help button.

pfnCallback

Pointer to an optional help callback function.

 

If you do not wish to provide help to this dialog, use NULL as the value of this parameter.

 

To provide help to this dialog, use the function pointer as the value of this parameter.

 

The callback function must adhere to the prototype described in LVCOMMDLGHELPCB.

pUserData

Void pointer that you can use to pass one or more additional parameters that the callback function needs.

 

To use this feature, assign a value to a variable or create a structure that contains as many fields as you need. Then, in this parameter, pass the address of the variable or structure, casting it to L_VOID *. The callback function, which receives the address in its own pUserData parameter, can cast it to a pointer of the appropriate data type to access your variable or structure.

 

If the additional parameters are not needed, you can pass NULL in this parameter.

Returns

SUCCESS

The function was successful.

< 1

An error occurred. Refer to Return Codes.

Comments

If no objects are currently selected in the source vector handle, all of the objects in the vector handle will be scaled in the dialog.

If there are selected objects inside the source vector handle, only those objects will be scaled in the dialog.

Required DLLs and Libraries

LVDLG

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:

L_VecSetScale, L_VecGetScale, L_VecSetOrigin, L_VecGetOrigin, L_VecDlgRotate, L_VecDlgTranslate

Example

This example will run the common scale dialog. 

L_INT VecDlgScaleExample(
   HWND hWnd,
   pVECTORHANDLE pVector)
{
   L_INT nRet;
   VECTORPOINT Point;

   nRet = L_VecGetScale (pVector, &Point);
   if(nRet != SUCCESS)
      return nRet;

   nRet = L_VecDlgScale(
      hWnd,
      pVector,
      &Point,
      NULL,
      VECTOR_DLG_AUTO_PROCESS |
      VECTOR_DLG_SHOW_PREVIEW,
      NULL,
      NULL);

   return nRet;
}