Using Win32 functions in Visual FoxPro Image Gallery
Code examples:
How to display the port-configuration dialog box for a port on the specified server
Managing Cookies
Pocket PC: System Registry Viewer
Using an Event Object. Part A: running an application that creates an Event object
Retrieving list of available disk drives
Simulating DOEVENTS
GetFocus returns a HWND value
Retrieving various system metrics
Enumerating Volumes and Volume Mounting Points (NTFS)
Smart Card Database Query Functions
Enumerating ODBC drivers available on the local computer
Enumerating Windows Sound Schemes avaialble to the current user
GDI+: converting image file to another graphics format
How to view icons stored in executable files (Icon Viewer)
GDI+: Storing DLL icon resources in image files
An alternative way of setting Form.Closable to False
Copying files as a transacted operation (Vista)
GDI+: Using Scale and Shear transformations
Setting and retrieving the double-click time for the mouse
Using GetFileSize
Using Multimedia Command Strings to play MIDI files
How to access a file using not its name but an alias (hard link)
Using named pipes for interprocess communication
Generating random UUID values
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: 13  
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 2001-2016 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 (5.6.30), the Open Source standard SQL database, AceHTML Freeware Version 4, freeware HTML Editor of choice.   Hosted by Korax Online Inc.
Last Topics Visited (54.158.209.26)
37 sec.Example: 'Retrieving graphic capabilities of your display'
3.72 min.Example: 'Class for sound recording'
3 day(s)Function: 'RtlGetCompressionWorkSpaceSize'
 Function: 'sendto'
Function group: 'Windows Sockets 2 (Winsock)'
 Example: 'PocketPC: custom RAPI class for executing routines on remote Windows CE device'
Google
Advertise here!