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public interface RegionChecker
This interface provides an API for determining the desired regional bounds
for a Dockable component. Implementing classes are responsible for
determining the bounds and proportional sizes for both docking regions and
sibling components.
As a Dockable is dragged across a DockingPort containing
another embedded Dockable, a determination must be made as to where
the dragged Dockable will be docked within the target
DockingPort based upon the current mouse position relative to
the embedded Dockable underneath the mouse. Classes that implement
this interface are responsible for making such determinations.
For example, if a Dockable is dragged over another Dockable
embedded within a DockingPort, and the current mouse position is
near the top edge of the embedded Dockable, the current
RegionChecker is responsible for determining whether the user is
attempting to dock in the north, east, west, or
center of the embedded Dockable. The visual
DragPreview displayed to the end user should reflect this
determination.
Once the docking operation is complete and the layout has been split between
both Dockables, the actual percentage of space allotted to the new
Dockable in the layout, referred to as the "sibling", is also
determined by the current RegionChecker implementation.
| Field Summary | |
|---|---|
static float |
DEFAULT_REGION_SIZE
Default region size. |
static float |
DEFAULT_SIBLING_SIZE
Default sibling size. |
static String |
DEFAULT_SIBLING_SIZE_KEY
A key to find a system property that will override the default sibling size in this interface. |
static float |
MAX_REGION_SIZE
Default maximum region size. |
static float |
MAX_SIBILNG_SIZE
Default maximum sibling size. |
static float |
MIN_REGION_SIZE
Default minimum region size. |
static float |
MIN_SIBILNG_SIZE
Default minimum sibling size. |
| Method Summary | |
|---|---|
Rectangle |
getEastRegion(Component component)
Returns the rectangular bounds within the specified component that represent it's DockingConstants.EAST_REGION. |
Rectangle |
getNorthRegion(Component component)
Returns the rectangular bounds within the specified component that represent it's DockingConstants.NORTH_REGION. |
String |
getRegion(Component component,
Point point)
Returns the docking region of the supplied Component that
contains the coordinates of the specified Point. |
Rectangle |
getRegionBounds(Component component,
String region)
Returns the rectangular bounds within the specified component that represent the specified region. |
float |
getRegionSize(Component component,
String region)
Returns a percentage representing the amount of space allotted for the specified region within the specified Component. |
Rectangle |
getSiblingBounds(Component component,
String region)
A Rectangle representing the actual amount of space to allot for
sibling Components should they be docked into the specified
region. |
float |
getSiblingSize(Component component,
String region)
Returns a percentage representing the amount of space allotted for sibling Components to be docked within the specified region of
the supplied Component. |
Rectangle |
getSouthRegion(Component component)
Returns the rectangular bounds within the specified component that represent it's DockingConstants.SOUTH_REGION. |
Rectangle |
getWestRegion(Component component)
Returns the rectangular bounds within the specified component that represent it's DockingConstants.WEST_REGION. |
| Field Detail |
|---|
static final float MAX_REGION_SIZE
static final float MIN_REGION_SIZE
static final float MAX_SIBILNG_SIZE
static final float MIN_SIBILNG_SIZE
static final float DEFAULT_REGION_SIZE
static final float DEFAULT_SIBLING_SIZE
static final String DEFAULT_SIBLING_SIZE_KEY
DEFAULT_SIBLING_SIZE,
Constant Field Values| Method Detail |
|---|
String getRegion(Component component,
Point point)
Component that
contains the coordinates of the specified Point. Valid return
values are those regions defined in DockingConstants and include
CENTER_REGION, NORTH_REGION, SOUTH_REGION,
EAST_REGION, WEST_REGION, or UNKNOWN_REGION.
component - the Component whose region is to be examined.point - the coordinates whose region is to be determined.
Point.Rectangle getNorthRegion(Component component)
DockingConstants.NORTH_REGION.
component - the Component whose north region is to be returned.
Component.Rectangle getSouthRegion(Component component)
DockingConstants.SOUTH_REGION.
component - the Component whose south region is to be returned.
Component.Rectangle getEastRegion(Component component)
DockingConstants.EAST_REGION.
component - the Component whose east region is to be returned.
Component.Rectangle getWestRegion(Component component)
DockingConstants.WEST_REGION.
component - the Component whose west region is to be returned.
Component.
Rectangle getRegionBounds(Component component,
String region)
region
parameter are those regions defined in DockingConstants and
include NORTH_REGION, SOUTH_REGION, EAST_REGION,
and WEST_REGION. All other region values should result in this
method returning a null reference.
component - the Component whose region bounds are to be returned.region - the specified region that is to be examined.
Component.
float getRegionSize(Component component,
String region)
Component. For example, a
return value of 0.25F for NORTH_REGION implies that the top 25% of the
supplied Component's bounds rectangle is to be interpreted as the
Component's northern region. Valid values for the region
parameter are those regions defined in DockingConstants and
include NORTH_REGION, SOUTH_REGION, EAST_REGION,
and WEST_REGION. All other region values should result in this
method returning the constant DEFAULT_SIBLING_SIZE.
component - the Component whose region is to be examined.region - the specified region that is to be examined.
Component allotted for
the specified region.
Rectangle getSiblingBounds(Component component,
String region)
Rectangle representing the actual amount of space to allot for
sibling Components should they be docked into the specified
region. This method differs from
getRegionBounds(Component c, String region) in that
getRegionBounds() determines the amount to space used to check
whether a Component's docking will intersect with a particular
region, whereas this method returns the actual amount of space said
Component will take up after docking has been completed. Valid
values for the region parameter are those regions defined in
DockingConstants and include NORTH_REGION,
SOUTH_REGION, EAST_REGION, and WEST_REGION.
All other region values should result in this method returning the
constant DEFAULT_SIBLING_SIZE.
component - the Component whose sibling bounds are to be returned.region - the specified region that is to be examined.
Components docked into the specified region of the of the
specified Component.
float getSiblingSize(Component component,
String region)
Components to be docked within the specified region of
the supplied Component. This method differs from
getRegionSize(Component c, String region) in that
getRegionSize() determines the proportional space used to check
whether a Component's docking will intersect with a particular
region, whereas this method returns the proportional space said
Component will take up after docking has been completed. Valid
values for the region parameter are those regions defined in
DockingConstants and include NORTH_REGION,
SOUTH_REGION, EAST_REGION, and WEST_REGION.
All other region values should result in this method returning the
constant DEFAULT_SIBLING_SIZE.
component - the Component whose sibling proportions are to be
returned.region - the specified region that is to be examined.
Component allotted for
sibling Components that are to be docked into the
specified region.
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