Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Using SQLBrowseConnect to connect to a data source through a number of iterative calls (SQL Server)
Using the FindMediaType function
Converting long file names to the short format and vice versa
Retrieving names for the registered clipboard formats
Simple MAPI: how to pick an email recipient from Outlook Express address book
How to fill a buffer with random bytes using Cryptography API Functions
Obtaining window class name for the main VFP window
Using an Event Object. Part A: running an application that creates an Event object
Who is the first in viewing the Clipboard
Converting path to original case
How to empty the Recycle Bin
Obtaining some properties for the Windows desktop using the GetWindowPlacement function
Saying "Hello World!" with VFP and WinAPI
Using the SetErrorMode for determining if a floppy drive is ready
Displaying all TCP connections for the local system
GDI+: converting image file to another graphics format
Reading and setting Environment variables
Retrieving Network Provider information
URL: converting unsafe characters and spaces into escape sequences
Using the GradientFill function
Winsock: creating a socket that is bound to a specific service provider
Creating a file, then moving it to another destination
Finding the path to the VFP executable running
How to retrieve information about a cache entry (Internet Explorer)
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: 58  
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 2001-2017 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 (5.6.36), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.146.5.196)
11 sec.Example: 'How to retrieve adapter information for the local computer (including MAC address)'
22 sec.Function: 'GetWindowPlacement'
Function group: 'Window'
33 sec.Function: 'GetTextExtentPoint32'
43 sec.
Function group: 'HTTP Functions (WinHTTP)'
56 sec.Function: 'GetDriveType'
Function group: 'File Management'
1.15 min.
Function group: 'Shell Lightweight Utility APIs -- misc. functions'
1.37 min.Example: 'How to change display settings: screen resolution, screen refresh rate'
1.58 min.Example: 'Downloading files from the FTP server using InternetReadFile'
1.78 min.Function: 'getnameinfo'
Function group: 'Windows Sockets 2 (Winsock)'
2.02 min.Function: 'GetMonitorContrast'
Google
Advertise here!