Reimplementation of widget subsystem

[andrew_b]

Frist stage:

1. Derive dialog from widget.
2. Unification of widget and dialog callback functions and message handling.
3. Enhance widget capabilities.
4. New QuickDialog? engine that simplifies dialog building.
5. Build dialogs in normal order only: place widgets from top-left down to bottom-right.

[andrew_b]

Branch: 2919_dlg_as_widget (parent: master).
Initial changeset:6abcba470d3934c091d9b498ed48b3063261abfb

[andrew_b]

Merged to master: [47fc9f669f46ea9735e139eb871a65cc157fb94b].

git log --pretty=oneline f45f155..47fc9f6

[andrew_b]

The next stage: refactoring of widget select/deselect and focus/unfocus:

• add WOP_SELECTABLE option that shows whether widget can be selected (WInput, WCheck, etc) or not (WLabel, WGauge, etc). Test this option instead of callback call;
• add WST_FOCUSED state and use it instead widget-own states (WListbox::focused, WButton::selected, WTree::active, etc). Test this option instead of callback call;
• get rid of multiple widget redraw. In many cases messages MSG_DRAW and MSG_FOCUS (and/or MSG_RESIZE) are sent to widget in series. Handling these messages, widget is redrawn twice (for example, see input_callback():

       case MSG_RESIZE:
       case MSG_FOCUS:
       case MSG_UNFOCUS:
       case MSG_DRAW:
           input_update (in, FALSE);
           return MSG_HANDLED;
  

  MSG_DRAW message handler must be the only place where widget should be drawn. Widget should not draw itself in other message handlers.

Branch: 2919_widget_focus_refactoring
Initial changeset:85040195fabf14534ad47a01b4356cbcad1940bf

Some dialogs are located in top-left corner. This bug is fixed in 3641_cleanup branch.

[andrew_b]

Merged to master: [4d6ea432829250f32bfecba3bd7eadd35a546b09].

git log --pretty=oneline 9c3fe04..4d6ea43

[andrew_b]

Next step: implementation of WGroup widget -- a base class for widgets which contain other widgets.

Branch: 2919_group.
Initial changeset:c36cd25cd44d98bad1ca3309fe5b49502a34cc8b

[andrew_b]

Branch: 2919_group.
Initial changeset:874783d9e73a804064d41bb1421f7a0b1ccc46c5

[andrew_b]

Merged to master: [a55b3fb6847147251bac69b8a6c6218f6fc67aac].

git log --pretty=oneline afb09f7cd..a55b3fb68

[andrew_b]

New widget state: WST_VISIBLE. Applied to make widget visible/invisible.

Branch: 2919_visible
Initial changeset:81aeb633e8de7e62117cf13b237ff2ddaaa94f5d

[andrew_b]

Merged to master: [0aaf74777d65ac2539b73c14d2e4e2baecb13451].

git log --pretty=oneline f67b6c1d0..0aaf74777

[zaytsev]

Actually are you planning to work on that? :) Just asking, because I keep moving this to the next milestone for the last 2 years...

[andrew_b]

OK.