diff options
Diffstat (limited to 'libjava/java/awt/BorderLayout.java')
| -rw-r--r-- | libjava/java/awt/BorderLayout.java | 251 |
1 files changed, 227 insertions, 24 deletions
diff --git a/libjava/java/awt/BorderLayout.java b/libjava/java/awt/BorderLayout.java index 6f4cb5cdb4c..0d779c1a752 100644 --- a/libjava/java/awt/BorderLayout.java +++ b/libjava/java/awt/BorderLayout.java @@ -8,12 +8,25 @@ details. */ package java.awt; -/* A very incomplete placeholder. */ - -public class BorderLayout implements LayoutManager2 +public class BorderLayout implements LayoutManager2, java.io.Serializable { + public static final String NORTH = "North", + SOUTH = "South", + EAST = "East", + WEST = "West", + CENTER = "Center"; + + // FIXME: use these too + public static final String BEFORE_FIRST_LINE = "First", + AFTER_LAST_LINE = "Last", + BEFORE_LINE_BEGINS = "Before", + AFTER_LINE_ENDS = "After"; + + + // FIXME: check serialization of fields int hgap; int vgap; + Component north, south, east, west, center; public BorderLayout () { @@ -26,26 +39,216 @@ public class BorderLayout implements LayoutManager2 this.vgap = vgap; } - public void addLayoutComponent (String name, Component comp) - { /* FIXME */ } - public void layoutContainer (Container parent) - { /* FIXME */ } - public Dimension minimumLayoutSize (Container parent) - { /* FIXME */ return null; } - public Dimension preferredLayoutSize (Container parent) - { /* FIXME */ return null; } - public void removeLayoutComponent (Component comp) - { /* FIXME */ } - - public void addLayoutComponent (Component comp, Object constraints) - { /* FIXME */ } - public float getLayoutAlignmentX (Container target) - { /* FIXME */ return (float) 0.0; } - public float getLayoutAlignmentY (Container target) - { /* FIXME */ return (float) 0.0; } - public void invalidateLayout (Container target) - { /* FIXME */ } - public Dimension maximumLayoutSize (Container target) - { /* FIXME */ return null; } + public int getHgap() + { + return hgap; + } + + public void setHgap(int hgap) + { + this.hgap = hgap; + } + + public int getVgap() + { + return vgap; + } + + public void setVgap(int vgap) + { + this.vgap = vgap; + } + + public void addLayoutComponent(Component comp, Object constraints) + { + if ((constraints == null) || CENTER.equals(constraints)) + { + center = comp; + } + else if (NORTH.equals(constraints)) + { + north = comp; + } + else if (SOUTH.equals(constraints)) + { + south = comp; + } + else if (EAST.equals(constraints)) + { + east = comp; + } + else if (WEST.equals(constraints)) + { + west = comp; + } + } + + public void addLayoutComponent(String name, Component comp) + { + addLayoutComponent(comp, name); + } + + public void removeLayoutComponent(Component comp) + { + if (center == comp) + { + center = null; + } + else if (north == comp) + { + north = null; + } + else if (south == comp) + { + south = null; + } + else if (east == comp) + { + east = null; + } + else if (west == comp) + { + west = null; + } + } + + public Dimension minimumLayoutSize(Container target) + { + return calcSize(getMinimumSize(center), + getMinimumSize(north), + getMinimumSize(south), + getMinimumSize(east), + getMinimumSize(west), + target); + } + + public Dimension preferredLayoutSize(Container target) + { + return calcSize(getPreferredSize(center), + getPreferredSize(north), + getPreferredSize(south), + getPreferredSize(east), + getPreferredSize(west), + target); + } + + /** + * Completely disregards the requested maximum sizes of the + * components, and states that the container has no upper size + * limit. + * + * @return a dimension of width and height Integer.MAX_VALUE. + */ + public Dimension maximumLayoutSize(Container target) + { + return (Dimension) DIM_MAX.clone(); + } + + public float getLayoutAlignmentX(Container parent) + { + return Component.CENTER_ALIGNMENT; + } + + public float getLayoutAlignmentY(Container parent) + { + return Component.CENTER_ALIGNMENT; + } + + public void invalidateLayout(Container target) + { + // TODO... implement caching? + } + + public void layoutContainer(Container target) + { + Insets i = target.getInsets(); + Dimension c = getPreferredSize(center); + Dimension n = getPreferredSize(north); + Dimension s = getPreferredSize(south); + Dimension e = getPreferredSize(east); + Dimension w = getPreferredSize(west); + Dimension t = target.getSize(); + + /* + <-> hgap <-> hgap + +----------------------------+ } + |t | } i.top + | +----------------------+ | --- y1 } + | |n | | + | +----------------------+ | } vgap + | +---+ +----------+ +---+ | --- y2 } } + | |w | |c | |e | | } hh + | +---+ +----------+ +---+ | } vgap } + | +----------------------+ | --- y3 } + | |s | | + | +----------------------+ | } + | | } i.bottom + +----------------------------+ } + |x1 |x2 |x3 + <----------------------> + <--> ww <--> + i.left i.right + */ + + int x1 = i.left; + int x2 = x1 + w.width + hgap; + int x3 = t.width - i.right - e.width; + int ww = t.width - i.right - i.left; + + int y1 = i.top; + int y2 = y1 + n.height + vgap; + int y3 = t.height - i.bottom - s.height; + int hh = y3-y2-vgap; + + setBounds(center, x2, y2, x3-x2-hgap, hh); + setBounds(north, x1, y1, ww, n.height); + setBounds(south, x1, y3, ww, s.height); + setBounds(west, x1, y2, w.width, hh); + setBounds(east, x3, y2, e.width, hh); + } + + public String toString() + { + return getClass().getName() + "[hgap=" + hgap + ",vgap=" + vgap + "]"; + } + + // Support: + + static final Dimension DIM_0 = new Dimension(0, 0); + static final Dimension DIM_MAX = new Dimension(Integer.MAX_VALUE, + Integer.MAX_VALUE); + + void setBounds(Component comp, int x, int y, int w, int h) + { + if (comp == null) + return; + comp.setBounds(x, y, w, h); + } + + Dimension getMinimumSize(Component comp) + { + if (comp == null) + return DIM_0; + return comp.getMinimumSize(); + } + + Dimension getPreferredSize(Component comp) + { + if (comp == null) + return DIM_0; + return comp.getPreferredSize(); + } + + Dimension calcSize(Dimension c, Dimension n, Dimension s, + Dimension e, Dimension w, Container target) + { + Insets i = target.getInsets(); + + return new Dimension(c.width + e.width + w.width + hgap*2 + + i.left + i.right, + c.height + n.height + s.height + vgap*2 + + i.top + i.bottom + ); + } } |
