Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Retrieving the IP-to-physical address mapping table
Retrieving various system metrics
Testing an ODBC connection for supporting specific functionality
Using the GradientFill function
Creating a directory on the FTP
Form Magnifier
Obtaining Shell32.dll version
Pocket PC: creating new database in the Object Store and copying Contacts Database records into it
Retrieving statistics for the TCP protocol running on the local computer
The window and its ancestors
Winsock: changing the byte ordering
Winsock: how to retrieve the protocol information corresponding to a protocol name
Accessing LSA Policy object (Local Security Authority)
Controlling master audio volume by sending WM_APPCOMMAND messages
Pocket PC: retrieving data from the Contacts Database
Retrieving the name of the network resource associated with a local device
Using named pipes for interprocess communication
Using Shell for performing operations on files
Enumerating MIDI output devices
Removing FTP directory
Retrieving configuration information for the specified server (Win98/Me)
Retrieving current settings for an ODBC connection
Retrieving default spooling directory name
Using Font and Text functions
GDI+: loading image file, drawing on it, saving the result to another file

User rating: 0/10 (0 votes)
Rate this code sample:
  • ~
More code examples    Listed functions    Add comment     W32 Constants      Translate this page Printer friendly version of this code sample
Versions:
click to open
Before you begin:
The example shows how to load an image file, put semi-transparent frame with a text on it, and save the result to another file.

Make sure the source and target file names are valid. The source file can be in any of graphics formats supported by the GDI+: BMP, GIF, JPG, TIF, EMF...

The code is based on custom GDI+ class. Download the class module first and save it in gdiplus.prg file.
SET PROCEDURE TO gdiplus ADDITIVE

PRIVATE gdiplus, src, dst, himage
gdiplus = CREATEOBJECT("gdiplusinit")

src = CREATEOBJECT("gdiimage", "c:\windows\forest.bmp")
dst = CREATEOBJECT("gdiimage", src)

IF dst.imgtype=0 OR VARTYPE(dst.graphics) <> "O"
    ? "Error code:", dst.errorcode
    RETURN
ENDIF

LOCAL gdibrush, gdipen, fnt
STORE 0 TO gdibrush, gdipen

* creating brush, pen and font objects
* note that the alpha channel is defined for the solid brush,
* which creates semi-transparent fill
= GdipCreateSolidFill(ARGB(255,255,255, 128), @gdibrush)
= GdipCreatePen1(ARGB(220,220,255), 2, 2, @gdipen)
fnt = CREATEOBJECT("gdifont", "Arial", 24, 1, ARGB(220,220,255))

* drawing filled semi-transparent rectangle with a border
= GdipFillRectangle(dst.graphics.graphics, gdibrush, 5,5, 160,50)
= GdipDrawRectangle(dst.graphics.graphics, gdipen, 5,5, 160,50)

* printing text
= dst.graphics.DrawText("SAMPLE",;
    fnt, 10,10, dst.imgwidth-10, 0)

* releasing system resources
= GdipDeletePen(gdipen)
= GdipDeleteBrush(gdibrush)

* creating drawing surface based on main VFP window
LOCAL gr
gr = CREATEOBJECT("graphics", _screen.HWnd)

gr.DrawImage(src, 20,20)
gr.DrawImage(dst, 20+src.imgwidth+5,20)

*= dst.SaveToFile("d:\temp\tmp.bmp")

* end of main



User rating: 0/10 (0 votes)
Rate this code sample:
  • ~
1294 bytes  
Created: 2004-07-22 12:43:04  
Modified: 2005-10-13 10:33:55  
Visits in 7 days: 35  
Listed functions:
Printer friendly API declarations
My comment:
The transparency is controlled by the alpha-channel value. In this particular example a semi-transparent solid brush is used.

#kwd: sln_gdiplus.
Word Index links for this example:
Translate this page:
  Spanish    Portuguese    German    French    Italian  
FreeTranslation.com offers instant, free translations of text or web pages.
User Contributed Notes:
There are no notes on this subject.


Copyright 2001-2014 News2News, Inc. Before reproducing or distributing any data from this site please ask for an approval from its owner. Unless otherwise specified, this page is for your personal and non-commercial use. The information on this page is presented AS IS, meaning that you may use it at your own risk. Microsoft Visual FoxPro and Windows are trade marks of Microsoft Corp. All other trademarks are the property of their respective owners. 

Privacy policy
Credits: PHP (4.4.9), an HTML-embedded scripting language, MySQL (5.1.68), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.204.94.228)
1.25 min.Function: 'CreateWindow'
Function group: 'Window'
4.48 min.Function: 'SetFilePointerEx'
Function group: 'File Management'
1 day(s)Example: 'GDI+: Creating thumbnails to preview images in a directory'
4 day(s)Function: 'CryptEnumProviderTypes'
Function group: 'Cryptography Reference'
 Example: 'Displaying bitmap using the AlphaBlend function'
 Example: 'Retrieving the state of your Internet connection'
 Example: 'Printing text on the main VFP window'
 Function: 'send'
Function group: 'Windows Sockets 2 (Winsock)'
 
Function group: 'GDI+ Bitmap'
 Function: 'GetPrinterData'
Function group: 'Printing and Print Spooler'
Google
Advertise here!