Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
Converting a decimal string to an integer
Retrieving local computer and user names
GDI+: Using Scale and Shear transformations
How to perform Base64 encoding/decoding using Cryptography API Functions
Form Magnifier
Converting path to original case
Terminating all running applications from a VFP program
An alternative way of setting Form.Closable to False
GDI+: Storing DLL icon resources in image files
Generating random UUID values
GDI+: converting image file to another graphics format
Using GetFileSize
Controlling master audio volume by sending WM_APPCOMMAND messages
Enumerating Volumes and Volume Mounting Points (NTFS)
How to play a waveform sound (a WAV file in particular)
How to check whether the system is 32-bit or 64-bit
Setting and retrieving the double-click time for the mouse
How to start the screen saver and how to find whether the screen saver is active
Obtaining the System and Windows folder names
URL: converting unsafe characters and spaces into escape sequences
Using Shell for performing operations on files
Closing Windows
Using GetCompressedFileSize (WinNT only)
Using SQLBrowseConnect to connect to a data source through a number of iterative calls (SQL Server)
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: 22  
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 (54.82.186.169)
2.04 hrs.Function: 'TaskDialog'
2 day(s)Function: 'ChooseFont'
 Function: 'MAPISendMail'
 Example: 'Downloading files from the FTP server using InternetReadFile'
6 day(s)Example: 'How to ping a remote site using ICMP API calls'
 
Function group: 'Service'
 Example: 'GDI+: sending image of FoxPro form to printer'
 Function: 'GetPhysicalMonitorsFromHMONITOR'
Google
Advertise here!