Multi screen support

Overview

The aim of this project is to enhance Vision with a support for multiple screens.

Resources

• In order to be able to change the library code you have to delete the 'readonly="True"' in the library tags of the project's acex file or just click on the project settings in the Eiffel Studio and change it there.

• C# screen class interface

• Gdk - Resources:
  • class GdkDisplay
  • class GdkScreen

• WEL - Resources:
  • NONE

• Win32 API - Resources:
  • look at the platform SDK under 'Win32 API'
  • Wel uses a callback function to get access to all fonts (it's pretty much the same that we have to do)
    • see the mail from manu (see also the following mails)
    • in the SDK you find the EnumFontFamilies function under 'Graphics Device Interface' -> 'Fonts and Text' -> '... Reference' -> '... Functions'
    • look at %Eiffel%\library\wel\clib\enumfold.c
    • look at class wel_font_family_enumerator - especially at feature cwin_enum_font_families

• Team SVN Rep: You need to backup and remove the directories 'vison2' and 'wel' in your '/Eiffel57/library/' directory and run a svn checkout from https://svn.eiffel.com/eiffelstudio/branches/eth/soft-arch/TeamMultiScreenSupport .

Implementation

Vision2

class EV_SCREEN:

• allscreenslist [EV_MONITOR]
• primaryscreen : EV_MONITOR

class EV_MONITOR:

• create class
• width, height, vertical_resolution, horzintal_resolution
• monitor_at_position (pos: EV_COORDINATE): INTEGER
• get_global_coordinate (pos: EV_COORDINATE; screen_nr: INTEGER): EV_COORDINATE

class EV_MONITOR_IMP :

• add multiscreen features as needed
• Windows: is client of WEL_MONITORS_DC

class EV_MONITOR_I:

• add new deferred features from EV_MONITOR_IMP

class GDK_EXTERNALS:

• add multiscreen features as needed

Wel

class WEL_MONITOR_ENUMERATOR:

• deferred feature action
• accesses C functions to enumerate all monitors

class WEL_MONITORS_DC (inherits: WEL_MONITOR_ENUMERATOR):

• defines deferred feature action from WEL_MONITOR_ENUMERATOR
• gives acces to the DC of all monitors

Milestones

M1: June 1st

• needed gdk features
• decide upon implementation

M2: May ???

• To be completed by the team

To do

• Fabio:

• Pascal:
  • look at Win32API and get dummy prog to work (see resources)

• Pawi
  • find out how to do the docu (take a look at Doc builder)

• Dario
  • find out how works 'external' (done.)
  • create Class EV_MONITOR(inherits EV_SCREEN) (done; see svn)
  • implement linux version of EV_MONITOR_IMP (done.)

Documentation

The documentation for this projet can be found here.

Team

Everyone interested in this project is welcome to join our mailinglist es-ui@origo.ethz.ch

• Project Leader: Dario
• Bayt
• Fabio
• Pawi
• Pascal