TWin: Active borders and snap tiling

This commit is a squash of the commits of TDE/tdebase#331.

In short, this backports some improvements to existing electric border
functionality from KDE, adds the snap tiling (or aerosnap) feature and
brings rudimentary support for active corners, which will be fully
implemented in a later PR.

The options dialog and the documentation has been updated to reflect
these changes.

Additionally, a new relevant option is introduced: an option for
restoring the original size of maximized/tiled windows when the user
starts dragging them. The option is set to be off by default,
preserving the traditional behaviour of KDE 3.x/TDE.

Last but not least, the term "electric" in relation to borders and
corners is replaced by "active" for clarity to the users.

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>

1 files changed, 19 insertions, 7 deletions

diff --git a/twin/options.h b/twin/options.h
index 113e6b9e6..55183e6bd 100644
--- a/twin/options.h
+++ b/twin/options.h
@@ -269,6 +269,13 @@ class Options : public KDecorationOptions
         bool showGeometryTip();
 
         /**
+        * @returns true if a maximized or tiled window should be reset to its original
+        *          size when dragging it.
+        * @since R14.1.1
+        */
+        bool resetMaximizedWindowGeometry();
+
+        /**
         * @returns A TQColor representing the colour that window drop shadows should
         *          be.
         */
@@ -307,18 +314,22 @@ class Options : public KDecorationOptions
         */
         int shadowYOffset(bool active=true);
 
-        enum { ElectricDisabled = 0, ElectricMoveOnly = 1, ElectricAlways = 2 };
+        enum { ActiveDisabled = 0,
+               ActiveSwitchOnMove = 1,
+               ActiveSwitchAlways = 2,
+               ActiveTileOnly = 3,
+               ActiveTileMaximize = 4 };
         /**
-        * @returns true if electric borders are enabled. With electric borders
+        * @returns true if active borders are enabled. With active borders
         * you can change desktop by moving the mouse pointer towards the edge
         * of the screen
         */
-        int electricBorders();
+        int activeBorders();
 
         /**
-        * @returns the activation delay for electric borders in milliseconds.
+        * @returns the activation delay for active borders in milliseconds.
         */
-        int electricBorderDelay();
+        int activeBorderDelay();
 
         bool topMenuEnabled() const { return topmenus; }
         bool desktopTopMenu() const { return desktop_topmenu; }
@@ -373,9 +384,10 @@ class Options : public KDecorationOptions
         bool CmdAllRevWheel;
         uint CmdAllModKey;
 
-        int electric_borders;
-        int electric_border_delay;
+        int active_borders;
+        int active_border_delay;
         bool show_geometry_tip;
+        bool reset_maximized_window_geometry;
         bool topmenus;
         bool desktop_topmenu;
         TQColor shadow_colour;