(svn r7094) -Codechange: Get rid of the window-specific code in DoZoomInOutWindow (enable, disable
buttons depending on calling window, game-mode); handle it by broadcasting messages
to the calling window, because that knows how and what buttons to set.

(svn r6926) -Codechange: Rename WWT_4 to WWT_TEXTBTN_2 and WWT_6 to WWT_INSET (credits to peter1138
for the aptly found name)
-Codechange: Remove the explicit numbering from WindowWidgetTypes

(svn r6925) -Codechange: Be more strict with widget distinctions. WWT_PANEL is only plain panel,
WWT_IMGBTN must contain an image for drawing. Renamed WWT_PANEL_2 to WWT_IMGBTN_2
because that is what it is. Added WWT_PUSHBTN that is either just a pushable button,
or a textbutton, which text's drawn dynamically independent of widget.

(svn r6772) -Codechange: Do not abuse OWNER_SPECTATOR as the "owner" of the industry for
the minimap. This also saves us from having this huge _owner_colors table.

(svn r6631) -Codechange: Use accessors for click_state.
Another step toward merging XTDwidget.
The only two files not converted (window.h and widget.c) will be done at the very last commit)

(svn r6619) -Codechange: Use accessors for disabled_state.
Another step toward merging XTDwidget.
The only two files not converted (window.h and widget.c) will be done at the very last commit)

(svn r6381) -Cleanup: make the '/* */' comments that span multiple lines more uniform.
-Cleanup: whitespace alignment of a few tables.

(svn r6205) -CodeChange : use a switch case instead of a cascade of if
-CodeChange : rename var Engine *e to Engine *eng, since we have WindowEvent *e in same fnct
-CodeChange : fix a broken tabulation on a switch case. SOme breathing spaces too

(svn r6047) -Codechange: FOR_ALL now _only_ loops valid items, and skips invalid ones
-Codechange: use IsValidXXX where ever possible
Note: both changes to prepare for new pool system, which needs those changes.
For every pool there are 2 ugly lines, which will be removed when done
implementing new pool system.
Based on FS#13 by blathijs, partly implemented.

(svn r6040) -Add: when clicking twice on a Location Button, the SmallMap centers on your position (based on FS#54 by thomasdev)
-Add: when clicking twice in SmallMap on a position, it centers there (based on FS#54 by thomasdev)
-Add: add a button in SmallMap that centers the SmallMap on your current position (based on FS#54 by thomasdev)

(svn r6038) -Codechange: move mousewheel code to event WE_MOUSEWHEEL instead of a general function that handles that
-Codechange: use always 'e' for WindowsEvent, neverr 'we'

(svn r3564) Several smaller changes:
- Don't treat non-booleans as booleans
- Reduce variable scope
- Bracing
- Use DeMorgan's law to make conditionals easier to read
- if cascade -> switch
- Replace some magic numbers by symbolic names
- Avoid assignments within other statements

(svn r3556) Add accessors for handling tree tiles
See tree.h for details

(svn r3514) -Codechange: Replace direct fiddling of bits for the ground type and density of clear tiles with symbolic names and accessors.
See clear.h for details

(svn r3077) static, const, bracing, indentation, 0 -> '\0'/NULL, typos in comments, excess empty lines, minor other changes
nothing spectacular, just some stuff, which piled up

(svn r2425) - Fix (regression): wrong sprite for level-land cursor (thx Tron)
- CodeChange: change MapSizeX() - 1 to MapMaxX() in the smallmap drawing code

(svn r1718) Use the enum TileType as parameter/return type for [GS]etTileType() instead of plain int.
This makes it necessary to rename TileType() to GetTileType() because a type and a function may not share the same name.

(svn r1545) Add TileHeight() which returns the height (not multiplied by 8)
Replace some direct references to _map_type_and_height with TileHeight()/IsTileType()

(svn r1348) -Feature: resizable windows. Read the comment in window.h to find out
how the system works. All useful windows are already made resizable. Enjoy :)
-Fix: fixed some GUI-glitches and flaws along the way

(svn r1337) Use MapMax[XY]() (or MapSize[XY]() if appropriate) instead of TILE_MAX_[XY]
While here replace one erroneous TILE_MAX_X with MapMaxY()

(svn r1214) -Feature: Stickified Industries (list & window), Smallmaps (all three), Stations (list & window) and Towns (list & window). I hope I didn't forget to update a widget somewhere :O
-Feature: With the sticky windows on and some unfortunate resizing of your game it the 'close' button might go outside of the playing field, making it impossible to close. Added an option to the Options menu that closes all windows, even if they are stickified ("Close ALL windows")

(svn r1121) -Feature: Added sticky windows feature. A small pin allows the user to set the window as undeletable and can only be closed by hand. As an example the viewport window has been stickied (thanks to Neko-San)
-To use the feature add WDF_STICKY_BUTTON to the widget description and update all widget-ID's since sticky button will be widget 2.

(svn r925) Use sound enums
Also play the correct sound when a toyland road vehicle breaks down

(svn r901) Small step in the process to clean up the DPARAM mess:
- reduce to 2 sizes (*DParam64 for 64bit values, *DParam for the rest)
- use inline functions instead of macros
- add assert()s to check for buffer overruns

(svn r815) Include strings.h only in the files which need it.
This should reduce the compile time after altering english.txt by about 1/3, because "only" 62 instead of 90 .c files must be recompiled.

(svn r513) Merge revisions 402, 416, 417, 478, 479, 511, 512 from map to trunk
This includes 2 fixes
-Fix: [1048596] Monorail and Maglev sounds are swapped (r511)
-Add special case to load the jackhammer sound (r478)
The rest are cleanups und enumeration to make merging possible/easier

(svn r177) -Fix: padded out Widget code to solve warnings on C99 compiler (Tron)
-Fix: added WIDGETS_END macro for WWT_LAST which does this for all last widget-types