KReport/API Changes

Note

This is a design document

Design creation

Started: Jstaniek (talk) 08:59, 29 July 2015 (UTC)

The goal: Make it possible to create, modify, open and save KReport designs without touching the designer API.

New classes and relations between them proposed:

KReportDesign: setContent(xml) loads, toString() saves, modelled after
- We don't use KReportDocument name for this because actual document is: design+data
- Addressed issue: .kreport format loading happened in KoReportDesigner's ctor without proper error reporting
KReportDocument: design+data so it's more or less takes KReportDesign and KReportData args.
- KReportDocument can be rendered on a KReportWriter
KReportWriter is equivalent of QImageWriter, can use files or QIODevices
- Inherit KReportWriter to implement what we so far call 'renderers'
- KReportDocument+KReportWriter is like QPainter+QPaintDevice
- Current API solutions are not the best, e.g. see KoReportRendererContext

[KReportDesign]
              >--builds-[KReportDocument]-->-is-used-in-[KReportWriter]--writes-to--[File/Screen/Printer]
[ KReportData ]

Usage in unit tests: KReportDesign, KReportDocument, KReportWriter (impl.) are first classes for autotesting. See Autotests for scenarios.

During the API changes we have opportunity to rename Ko* prefixes to KReport too