Set*UIColor, etc.

The inseparable changes necessary to support live color updating across the
system in a sane, safe, and performant manner.

BView gains:

HasSystemColors()
HasDefaultColors()
AdoptSystemColors()
AdoptParentColors()
AdoptViewColor(BView*)
SetViewUIColor(color_which, float tint)
SetHighUIColor(...
SetLowUIColor(...
ViewUIColor(float* tint)
HighUIColor(...
LowUIColor(...
DelayedInvalidate()

BWindow gains a simple helper method:
IsOffscreenWindow()

BMessage gains:

AddColor()
FindColor()
GetColor()
HasColor()            * allegedly this API is deprecated, but I implemented it anyway
ReplaceColor()
SetColor()

Previous private ColorTools methods are made public and moved into GraphicsDefs:

mix_color, blend_color, disable_color

These are fully compatible with BeOS dan0 R5.1 methods and are just code cleanup
of BeOS example code under the OpenTracker license.

In addition, four new colors are created:
B_LINK_TEXT_COLOR
B_LINK_HOVER_COLOR
B_LINK_ACTIVE_COLOR
B_LINK_VISITED_COLOR

These changes are documented in their proper user documentation files.

In addition, due to a history rewrite, B_FOLLOW_LEFT_TOP has been defined and
used in lieu of B_FOLLOW_TOP | B_FOLLOW_LEFT and is included in this commit.

On the app_server side, the following has changed:

Add DelayedMessage - a system by which messages can be sent at a scheduled time,
and can also be merged according to set rules.  A single thread is used to service the
message queue and multiple recipients can be set for each message.
Desktop gains the ability to add message ports to a DelayedMessage so that
said messages can target either all applications or all windows, as needed.

Desktop maintains a BMessage which is used to queue up all pending color changes
and the delayed messaging system is used to enact these changes after a short
period of time has passed.  This prevents abuse and allows the system to merge
repeated set_ui_color events into one event for client applications, improving
performance drastically.

In addition, B_COLORS_UPDATED is sent to the BApplication, which forwards the message
to each BWindow.  This is done to improve performance over having the app_server
independently informing each window.

Decorator changes are live now, which required some reworking.

Signed-off-by: Augustin Cavalier <[email protected]>

headers/private/interface/ColumnListView.h

@@ -63,10 +63,10 @@ class RecursiveOutlineIterator;
 
 }	// ns BPrivate
 
-class BField;
-class BRow;
 class BColumn;
 class BColumnListView;
+class BField;
+class BRow;
 
 enum LatchType {
 	B_NO_LATCH					= 0,
@@ -353,6 +353,7 @@ public:
 	// Appearance (NEW STYLE)
 			void				SetColor(ColumnListViewColor colorIndex,
 									rgb_color color);
+			void				ResetColors();
 			void				SetFont(ColumnListViewFont fontIndex,
 									const BFont* font,
 									uint32 mask = B_FONT_ALL);
@@ -396,12 +397,14 @@ protected:
 
 private:
 			void				_Init();
+			void				_UpdateColors();
 			void				_GetChildViewRects(const BRect& bounds,
 									BRect& titleRect, BRect& outlineRect,
 									BRect& vScrollBarRect,
 									BRect& hScrollBarRect);
 
 			rgb_color 			fColorList[B_COLOR_TOTAL];
+			bool				fCustomColors;
 			BPrivate::TitleView* fTitleView;
 			BPrivate::OutlineView* fOutlineView;
 			BList 				fColumns;