Transparent offscreen bitmaps

Article View: borland.public.jbuilder.java.api

Article #1728

Back to borland.public.jbuilder.java.api Previous Next

#1728

From: Romano Signorelli
Date: Tue, 16 Oct 2001 14:14

17 lines
1642 bytes

Hello,
I'm using JBuilder 4 pro with Personal Java 3.1 JDK (1.1.8 compliant) for an
embedded application.

Asynchronuosly, I need to create various bitmaps, and, at paint time, to
draw them one over one, using transparency.
The final image is a multiple-bar graph with overlapped trend graphics. Each
graph is associated to different field parameters and data.
When a graph need to be modified (new data arrives), I can draw the whole
image simply using the other bitmaps and the new graph, without recreate all
the bitmaps.

I don't know how to create an offscreen - transparent bitmap.

Any suggestion?
Thanks, bye.
Romano Signorelli

Technical Details

Message-ID: <3bcc40b9$1_2@dnews>

Path:

arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!supernews.com!newsfeed.direct.ca!look.ca!newsfeed.media.kyoto-u.ac.jp!newsfeed.mesh.ad.jp!osa.uu.net!newsfeeds.ihug.co.nz!ihug.co.nz!dnews

Show Full Headers

Complete Article Headers

X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 1089d0,c9549079822a078a,start
X-Google-Attributes: gid1089d0,public
X-Google-ArrivalTime: 2001-10-16 07:18:28 PST
Reply-To: "Romano Signorelli" <removeunderlines-s_i_g_n_o_r_e_l_l_i@gefran.com>
From: "Romano Signorelli" <removeunderlines-s_i_g_n_o_r_e_l_l_i@gefran.com>
Newsgroups: borland.public.jbuilder.java.api
Subject: Transparent offscreen bitmaps
Date: Tue, 16 Oct 2001 16:14:13 +0200
Lines: 19
Organization: Gefran s.p.a.
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 5.00.2919.6700
X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6700
NNTP-Posting-Host: 212.210.176.19
Message-ID: <3bcc40b9$1_2@dnews>
X-Trace: dnews 1003241657 212.210.176.19 (16 Oct 2001 07:14:17 -0700)
Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!supernews.com!newsfeed.direct.ca!look.ca!newsfeed.media.kyoto-u.ac.jp!newsfeed.mesh.ad.jp!osa.uu.net!newsfeeds.ihug.co.nz!ihug.co.nz!dnews