LDialogImageEffect::DoModalBending

#include "ltwrappr.h"

virtual L_INT LDialogImageEffect::DoModalBending(hWndOwner)

Displays the Bending dialog box, and gets the options for LBitmap::Bending.

Returns

Comments

LDialogImageEffect::SetBendingParams must be called before using this function to set the initial values for the dialog. You can get the updated BENDINGDLGPARAMS with the values entered by the user through the dialog by using LDialogImageEffect::GetBendingParams.

The Bending dialog.

This dialog has the following fields:

Zoom to fit

Use this button to fit entire preview images on both the Before and After views.

Zoom to Normal

Use this button to view images with normal scale on both the Before and After views.

Before View

This view shows the original image before the dialog applies any changes to it.

This view can be dragged when it is not in Zoom to Fit zoom mode. Place the mouse cursor over the view window (the cursor will change to a hand), then click and drag.

After View

This view shows the original image with the dialog changes applied. This enables the user to see a preview of what the image should look like when the changes are applied.

The view can be dragged when it is not in Zoom to Fit zoom mode. Place the mouse cursor over the view window (the cursor will change to a hand), then click and drag.

Value Edit box and Slider:

Use the Value edit box or slider to set the amount of stretching. Positive values stretch the image toward the edges, and negative values stretch the image toward its center.

Type Drop-down list box:

Use this box to set the bending type. There are three types:

• Normal. Stretch the image along the vertical and horizontal planes.

• Horizontal. Stretch the image along the horizontal plane.

• Vertical. Stretch the image along the vertical plane.

Exposed Area Section:

This section contains a drop-down list box and a button for specifying how to fill any exposed areas. Available values are:

• Use Color: Use the color picker button to select the color to fill any exposed areas. Clicking the color picker button will activate a Color Dialog that will be used to set the color.

• Stretch Image: Stretch the image edges to fill the exposed area.

• Don't Change: Leave the exposed area as is, without changing it.

Rotate Check box:

Check this to rotate the image inside the arc pattern. It is available only if the Value edit box contains a negative value.

Pivot Section:

This section contains two edit boxes and a display area for setting the pivot point. You can also set the pivot point by right clicking on the Before view. The Pivot point appears on the point you just clicked.

X Edit box:

Use this to set the pivot's x-axis position in the image. Enter the value directly in the edit box or use the arrows to set the desired value.

Y Edit box:

Use this to set the pivot's y-axis position in the image. Enter the value directly in the edit box or use the arrows to set the desired value.

Cursor Pos (x,y)

Displays the mouse position with respect to the image.

Center Button:

Use the Center button to center the Before and After views with respect to the pivot point position.

OK

Use the OK button to close the dialog and apply the changes.

Cancel

Use the Cancel button to close the dialog and discard the changes.

Progress Bar

Located at the bottom of the dialog, this progress bar shows the percentage of the current dialog operation that has been completed.

Required DLLs and Libraries

L_INT LDialogImageEffect_DoModalBendingExample(LBitmap * pBitmap, HWND hWnd) 
{ 
   L_INT nRet; 
   LDialogImageEffect DlgImageEffect; 
   nRet = LDialogImageEffect::Initialize(DLG_INIT_COLOR ); 
   if(nRet != SUCCESS) 
      return nRet; 
   DlgImageEffect.SetBitmap(pBitmap); 
   BENDINGDLGPARAMS DlgParams; 
   memset ( &DlgParams, 0, sizeof ( BENDINGDLGPARAMS ) ); 
   DlgParams.uStructSize      = sizeof ( BENDINGDLGPARAMS ); 
   DlgImageEffect.EnableCallBack (FALSE); 
   DlgImageEffect.EnablePreview(TRUE); 
   DlgImageEffect.EnableAutoProcess(TRUE); 
   DlgImageEffect.EnableToolbar(TRUE); 
   nRet = DlgImageEffect.SetBendingParams(&DlgParams); 
   if(nRet != SUCCESS) 
      return nRet; 
   nRet = DlgImageEffect.DoModalBending(hWnd); 
   if(nRet < 1) 
      return nRet; 
   // Gets the updated values for the structure 
   nRet = DlgImageEffect.GetBendingParams(&DlgParams, sizeof(DlgParams)); 
   if(nRet != SUCCESS) 
      return nRet; 
   nRet = LDialogImageEffect::Free(); 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
}