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## devisor2.grid.backend
Class GridHotspotter

    java.lang.Object
      devisor2.grid.backend.BaseSelector
          devisor2.grid.backend.GridHotspotter

Direct Known Subclasses:
  GridSelector

public abstract class GridHotspotter
extends BaseSelector

This class adds the hotspotting mechanism to the BaseSelector.

Field Summary
`static int` | `HOTSPOT_BOTTOMCENTER`
`static int` | `HOTSPOT_BOTTOMLEFT`
`static int` | `HOTSPOT_BOTTOMRIGHT`
`static int` | `HOTSPOT_CENTERCENTER`
`static int` | `HOTSPOT_CENTERLEFT`
`static int` | `HOTSPOT_CENTERRIGHT`
`static int` | `HOTSPOT_NONE` constant to indicate that no hotspot has been hit
`static int` | `HOTSPOT_TOPCENTER`
`static int` | `HOTSPOT_TOPLEFT` constants to indicate the number of the hotspot that has been hit
`static int` | `HOTSPOT_TOPRIGHT`
`protected boolean[]` | `hotspotMask` this array holds the flags which hotspots are currently active and are therefore to be drawn and have to be sensitive to user input read it top to bottom left to right
`static boolean[]` | `MASK_ALL` the hotspot mask for all hotspots
`static boolean[]` | `MASK_CIRCLES` the hotspot mask for scaling when circles are involved
`static boolean[]` | `MASK_NODES` the hotspot mask for nodes only
`static boolean[]` | `MASK_ROTATE` the hotspot mask for rotating

Fields inherited from class devisor2.grid.backend.BaseSelector
`boundaryNodesOnly, cc, containsCircles, currentRect, da, g, nodesonly, perimeter, previousRectDrawn, rectToDraw, root`

Constructor Summary
`GridHotspotter(MainFrame mf, DrawingArea da)` The constructor just sets references correctly and initializes some variables

Method Summary
`java.awt.Point` | `getCenterHotspot()`
`int` | `getClickedHotspot(int x, int y)` determines what hotspot has been hit (use constants provided).
`java.awt.Point` | `getClickedHotspotCoords(int hotspot)`
`boolean[]` | `getHotspotMask()`
`java.awt.Point` | `getOppositeHotspotCoords(int hotspot)`
`java.awt.Point` | `getTopLeftHotspot()` same for the topleft corner
`void` | `setHotspotMask(boolean[] mask)` sets the hotspot mask to the given value, please use MASK??? constants provided
`void` | `setPerimeter(java.awt.Rectangle peri)` sets the perimeter rectangle used for scaling, rotating and translating, especially for the visual feedback for these operations
`void` | `updateHotspots()` updates the hotspot display, as XOR painting is used, this method draws hotspots if there are none, and removes them if they are already visible.

Methods inherited from class devisor2.grid.backend.BaseSelector
`clearSelectBox, containsCircles, getClickedItem, getSelectBox, getSelectedItems, isBoundaryNodesOnly, isNodesOnly, paintSelectBox, setGraphics, startSelectBox, updateSelectBox`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### hotspotMask

    protected boolean[] hotspotMask

  this array holds the flags which hotspots are currently active and are therefore to be drawn and have to be sensitive to user input read it top to bottom left to right

### HOTSPOT_NONE

    public static final int HOTSPOT_NONE

  constant to indicate that no hotspot has been hit

  See Also:
    Constant Field Values

### HOTSPOT_TOPLEFT

    public static final int HOTSPOT_TOPLEFT

  constants to indicate the number of the hotspot that has been hit

  See Also:
    Constant Field Values

### HOTSPOT_TOPCENTER

    public static final int HOTSPOT_TOPCENTER

See Also:
  Constant Field Values

### HOTSPOT_TOPRIGHT

    public static final int HOTSPOT_TOPRIGHT

See Also:
  Constant Field Values

### HOTSPOT_CENTERLEFT

    public static final int HOTSPOT_CENTERLEFT

See Also:
  Constant Field Values

### HOTSPOT_CENTERCENTER

    public static final int HOTSPOT_CENTERCENTER

See Also:
  Constant Field Values

### HOTSPOT_CENTERRIGHT

    public static final int HOTSPOT_CENTERRIGHT

See Also:
  Constant Field Values

### HOTSPOT_BOTTOMLEFT

    public static final int HOTSPOT_BOTTOMLEFT

See Also:
  Constant Field Values

### HOTSPOT_BOTTOMCENTER

    public static final int HOTSPOT_BOTTOMCENTER

See Also:
  Constant Field Values

### HOTSPOT_BOTTOMRIGHT

    public static final int HOTSPOT_BOTTOMRIGHT

See Also:
  Constant Field Values

### MASK_ALL

    public static final boolean[] MASK_ALL

  the hotspot mask for all hotspots

### MASK_NODES

    public static final boolean[] MASK_NODES

  the hotspot mask for nodes only

### MASK_ROTATE

    public static final boolean[] MASK_ROTATE

  the hotspot mask for rotating

### MASK_CIRCLES

    public static final boolean[] MASK_CIRCLES

  the hotspot mask for scaling when circles are involved

Constructor Detail

### GridHotspotter

    public GridHotspotter(MainFrame mf,
                          DrawingArea da)

  The constructor just sets references correctly and initializes some variables

Parameters:
  `mf` - - the MainFrame reference
  `da` - - the drawing area where the select box will be painted on

Method Detail

### setHotspotMask

    public void setHotspotMask(boolean[] mask)

  sets the hotspot mask to the given value, please use MASK??? constants provided

  Parameters:
    `mask` - - the new gotspot mask, use constants provided

### getHotspotMask

    public boolean[] getHotspotMask()

  Returns:
    the currently active hotspot mask

### updateHotspots

    public void updateHotspots()

  updates the hotspot display, as XOR painting is used, this method draws hotspots if there are none, and removes them if they are already visible. Of course, the current hotspot mask is used.

  See Also:
    `setHotspotMask`

### getCenterHotspot

    public java.awt.Point getCenterHotspot()

  Returns:
    the screen coords of the center hotspot

### getTopLeftHotspot

    public java.awt.Point getTopLeftHotspot()

  same for the topleft corner

### getClickedHotspotCoords

    public java.awt.Point getClickedHotspotCoords(int hotspot)

  Returns:
    the screen coords of the clicked hotspot

### getOppositeHotspotCoords

    public java.awt.Point getOppositeHotspotCoords(int hotspot)

  Parameters:
    `hotspot` - - the hotspot last clicked on
  Returns:
    the screen coords of the hotspot opposite the one clicked on, e.g. if hotspot equals TOPLEFT, the coords of the BOTTOMRIGHT hotspot are returned

### setPerimeter

    public void setPerimeter(java.awt.Rectangle peri)

  sets the perimeter rectangle used for scaling, rotating and translating, especially for the visual feedback for these operations

### getClickedHotspot

    public int getClickedHotspot(int x,
                                 int y)

  determines what hotspot has been hit (use constants provided). Only hotspots that siut the hotspot mask currently set are accepted. If no hotspot is currently visible, alwazs NONE is returned.

  Returns:
    one of the hotspot constants (see below)

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