LAnimationWindow::EnableTransparency
#include "ltwrappr.h"
L_INT LAnimationWindow::EnableTransparency(bEnable=TRUE, clrTransparent=RGB(0,0,0), nIndex=ANIM_ALL_ITEMS)
L_BOOL bEnable; |
/* flag that indicates whether to enable transparency */ |
COLORREF clrTransparent; |
/* transparent color */ |
L_UINT nIndex; |
/* position of the bitmap list item */ |
Sets the transparency parameters to be used with playback for the bitmap item at position nIndex inside the bitmap list.
Parameter |
Description |
bEnable |
Flag that indicates whether to enable or disable transparency. Possible values are: |
Value |
Meaning |
TRUE |
Enable transparency. |
FALSE |
Disable transparency. |
clrTransparent |
COLORREF that represents the transparent color to use for animation playback. |
nIndex |
Position of the bitmap list item. Possible values are: |
Value |
Meaning |
ANIM_ALL_ITEMS |
[-1] Set the delay for all items in the bitmap list |
>=0 |
Set the delay only for the specified item |
Returns
SUCCESS |
The function was successful. |
< 1 |
An error occurred. Refer to Return Codes. |
Comments
Passing nIndex = ANIM_ALL_ITEMS will cause all the bitmaps in the list to be set.
Required DLLs and Libraries
LTDIS 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: |
LAnimationWindow::LAnimationWindow, LAnimationWindow::IsTransparencyEnabled, LAnimationWindow::Load, LAnimationWindow::PlayAnimation, Class Members |
Topics: |
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Example
The following example will change the transparency information
for odd numbered items in the animation list using EnableTransparency,
then reads the new information using IsTransparencyEnabled.
L_INT LAnimationWindow_EnableTransparencyExample(HWND hWndParent) { L_INT nRet; LBase::LoadLibraries(LT_ALL_LEADLIB); //make sure all libraries are loaded LAnimationWindow MyAnimation; WRPUNLOCKSUPPORT(); MyAnimation.SetFileName(TEXT("C:\\Program Files\\LEAD Technologies, Inc\\LEADTOOLS 15.0\\Images\\eye.gif")); nRet = MyAnimation.Load(); if (nRet==SUCCESS) { L_BOOL bEnabled; COLORREF crTranparent; L_UINT i; MyAnimation.CreateWnd(hWndParent,0, WS_VISIBLE|WS_CHILD|WS_BORDER,0,0,300,300); //change the transparency... for (i=0; i<MyAnimation.GetCount(); i++) { if (i%2) { nRet = MyAnimation.EnableTransparency(TRUE, RGB(i*35 % 256, i*50 % 256, i*75 % 256), i); if(nRet != SUCCESS) return nRet; } } for (i=0; i<MyAnimation.GetCount(); i++) { L_TCHAR szStr[255]; //get current transparenct info for each bitmap... nRet = MyAnimation.IsTransparencyEnabled(&bEnabled, &crTranparent, i); if(nRet != SUCCESS) return nRet; wsprintf(szStr,TEXT("Bitmap[%d] Transparency Info: Enabled= %s Color = &H%08X"),i, (bEnabled?TEXT("YES"):TEXT("NO")), crTranparent); MessageBox(hWndParent, szStr,TEXT("Example"), MB_OK | MB_ICONINFORMATION); } } else return nRet; return SUCCESS; }