[sdk] Allow header background customization per page

[Tim Peeters]

Each Page should have the ability to customize a few things about the look of the header, these changes should take affect when the page becomes the top page in a PageStack or the current tab in Tabs.

headerColor: Set the background color of the Header
headerGradient: Same as headerColor, only using a Gradient object instead of a single color
headerImage: Set a background Image on the Header, resized to fit based on fillMode
headerBorderImage: Same as headerImage, but using a BorderImage

follow-up of this bug: https://bugs.launchpad.net/ubuntu-ui-toolkit/+bug/1315884 which I changed to only include header foreground color customization.

[Tim Peeters (tpeeters)]

Adding
property Item backgroundItem

to Page.head may be a solution, like that the developer can set anything (or just a Rectangle if they want a simple colored background).

[Jouni Helminen (jounihelminen)]

Makes sense to allow developers to change the header colour by page if someone really wants to

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntu-ui-toolkit - 1.3.1688+15.10.20151018.1-0ubuntu1

---------------
ubuntu-ui-toolkit (1.3.1688+15.10.20151018.1-0ubuntu1) wily; urgency=medium

  [ Tim Peeters ]
  * Add delegate property to ActionBar.
  * Introduce PageHeader component.
  * Add header property to Page.
    Fixes LP: #1248898, LP: #1350893, LP: #1445016, LP: #1492328
  * Use the correct navigation overflow icon in PageHeader.

  [ Loïc Molinari ]
  * Fixed OpenGL ES 2 mipmap fallback. OpenGL ES 2 doesn't support
    GL_TEXTURE_MAX_LEVEL by default, it is only available via an extension. It
    was working on the devices where this extension is available but not on
    the emulator. Fixes LP: #1505221.

  [ Christian Dywan ]
  * Handle incubateObject returning null in PageWrapperUtils.
    Fixes LP: #1505197
  * Add module header to PageWrapperUtils.

  [ Zoltan Balogh ]
  * Improve test plan
    - Ad -q parameter to provision the device for normal use with a PPA
    - Fix up the camera and clock app on the device to acces services
    - Replace phablet tools with manual enabling writable image
    - Fix PPA pin up for staging and other regular PPAs.

  [ Zsombor Egri ]
  * Emit Dropped event for live ListItem drag'n'drop. Fixes LP: #1500118.

  [ Timo Jyrinki ]
  * Build dep on libinput-dev and libxkbcommon-dev (LP: #1437192).

  [ Benjamon Zeller ]
  * Remove unused variables.

  [ CI Train Bot ]
  * No-change rebuild.

 -- Zoltan Balogh <email address hidden> Sun, 18 Oct 2015 03:47:27 +0000