+++ /dev/null
-package com.gitblit.client;
-
-import java.awt.*;
-import java.awt.event.*;
-import javax.swing.*;
-
-/**
- * A flow layout arranges components in a directional flow, much
- * like lines of text in a paragraph. The flow direction is
- * determined by the container's <code>componentOrientation</code>
- * property and may be one of two values:
- * <ul>
- * <li><code>ComponentOrientation.TOP_TO_BOTTOM</code>
- * <li><code>ComponentOrientation.BOTTOM_TO_TOP</code>
- * </ul>
- * Flow layouts are typically used
- * to arrange buttons in a panel. It arranges buttons
- * horizontally until no more buttons fit on the same line.
- * The line alignment is determined by the <code>align</code>
- * property. The possible values are:
- * <ul>
- * <li>{@link #TOP TOP}
- * <li>{@link #BOTTOM BOTTOM}
- * <li>{@link #CENTER CENTER}
- * <li>{@link #LEADING LEADING}
- * <li>{@link #TRAILING TRAILING}
- * </ul>
- * <p>
- */
-public class VerticalFlowLayout implements LayoutManager, java.io.Serializable
-{
- /**
- * This value indicates that each row of components
- * should be left-justified.
- */
- public static final int TOP = 0;
-
- /**
- * This value indicates that each row of components
- * should be centered.
- */
- public static final int CENTER = 1;
-
- /**
- * This value indicates that each row of components
- * should be right-justified.
- */
- public static final int BOTTOM = 2;
-
- /**
- * <code>align</code> is the property that determines
- * how each column distributes empty space.
- * It can be one of the following three values:
- * <ul>
- * <code>TOP</code>
- * <code>BOTTOM</code>
- * <code>CENTER</code>
- * </ul>
- *
- * @see #getAlignment
- * @see #setAlignment
- */
- int align; // This is the one we actually use
-
- /**
- * The flow layout manager allows a seperation of
- * components with gaps. The horizontal gap will
- * specify the space between components and between
- * the components and the borders of the
- * <code>Container</code>.
- *
- * @see #getHgap()
- * @see #setHgap(int)
- */
- int hgap;
-
- /**
- * The flow layout manager allows a seperation of
- * components with gaps. The vertical gap will
- * specify the space between rows and between the
- * the rows and the borders of the <code>Container</code>.
- *
- * @see #getHgap()
- * @see #setHgap(int)
- */
- int vgap;
-
- /**
- * Constructs a new <code>VerticalFlowLayout</code> with a centered alignment and a
- * default 5-unit horizontal and vertical gap.
- */
- public VerticalFlowLayout()
- {
- this(CENTER, 5, 5);
- }
-
- /**
- * Constructs a new <code>VerticalFlowLayout</code> with the specified
- * alignment and a default 5-unit horizontal and vertical gap.
- * The value of the alignment argument must be one of
- * <code>VerticalFlowLayout.TOP</code>, <code>VerticalFlowLayout.BOTTOM</code>,
- * or <code>VerticalFlowLayout.CENTER</code>
- * @param align the alignment value
- */
- public VerticalFlowLayout(int align)
- {
- this(align, 5, 5);
- }
-
- /**
- * Creates a new flow layout manager with the indicated alignment
- * and the indicated horizontal and vertical gaps.
- * <p>
- * The value of the alignment argument must be one of
- * <code>VerticalFlowLayout.TOP</code>, <code>VerticalFlowLayout.BOTTOM</code>,
- * or <code>VerticalFlowLayout.CENTER</code>.
- * @param align the alignment value
- * @param hgap the horizontal gap between components
- * and between the components and the
- * borders of the <code>Container</code>
- * @param vgap the vertical gap between components
- * and between the components and the
- * borders of the <code>Container</code>
- */
- public VerticalFlowLayout(int align, int hgap, int vgap)
- {
- this.hgap = hgap;
- this.vgap = vgap;
- setAlignment(align);
- }
-
- /**
- * Gets the alignment for this layout.
- * Possible values are <code>VerticalFlowLayout.TOP</code>,
- * <code>VerticalFlowLayout.BOTTOM</code> or <code>VerticalFlowLayout.CENTER</code>,
- * @return the alignment value for this layout
- * @see java.awt.VerticalFlowLayout#setAlignment
- * @since JDK1.1
- */
- public int getAlignment()
- {
- return align;
- }
-
- /**
- * Sets the alignment for this layout. Possible values are
- * <ul>
- * <li><code>VerticalFlowLayout.TOP</code>
- * <li><code>VerticalFlowLayout.BOTTOM</code>
- * <li><code>VerticalFlowLayout.CENTER</code>
- * </ul>
- * @param align one of the alignment values shown above
- * @see #getAlignment()
- * @since JDK1.1
- */
- public void setAlignment(int align)
- {
- this.align = align;
- }
-
- /**
- * Gets the horizontal gap between components
- * and between the components and the borders
- * of the <code>Container</code>
- *
- * @return the horizontal gap between components
- * and between the components and the borders
- * of the <code>Container</code>
- * @see java.awt.VerticalFlowLayout#setHgap
- * @since JDK1.1
- */
- public int getHgap() {
- return hgap;
- }
-
- /**
- * Sets the horizontal gap between components and
- * between the components and the borders of the
- * <code>Container</code>.
- *
- * @param hgap the horizontal gap between components
- * and between the components and the borders
- * of the <code>Container</code>
- * @see java.awt.VerticalFlowLayout#getHgap
- * @since JDK1.1
- */
- public void setHgap(int hgap) {
- this.hgap = hgap;
- }
-
- /**
- * Gets the vertical gap between components and
- * between the components and the borders of the
- * <code>Container</code>.
- *
- * @return the vertical gap between components
- * and between the components and the borders
- * of the <code>Container</code>
- * @see java.awt.VerticalFlowLayout#setVgap
- * @since JDK1.1
- */
- public int getVgap() {
- return vgap;
- }
-
- /**
- * Sets the vertical gap between components and between
- * the components and the borders of the <code>Container</code>.
- *
- * @param vgap the vertical gap between components
- * and between the components and the borders
- * of the <code>Container</code>
- * @see java.awt.VerticalFlowLayout#getVgap
- */
- public void setVgap(int vgap) {
- this.vgap = vgap;
- }
-
- /**
- * Adds the specified component to the layout.
- * Not used by this class.
- * @param name the name of the component
- * @param comp the component to be added
- */
- public void addLayoutComponent(String name, Component comp) {
- }
-
- /**
- * Removes the specified component from the layout.
- * Not used by this class.
- * @param comp the component to remove
- * @see java.awt.Container#removeAll
- */
- public void removeLayoutComponent(Component comp) {
- }
-
- /**
- * Returns the preferred dimensions for this layout given the
- * <i>visible</i> components in the specified target container.
- *
- * @param target the container that needs to be laid out
- * @return the preferred dimensions to lay out the
- * subcomponents of the specified container
- * @see Container
- * @see #minimumLayoutSize
- * @see java.awt.Container#getPreferredSize
- */
- public Dimension preferredLayoutSize(Container target)
- {
- synchronized (target.getTreeLock())
- {
- Dimension dim = new Dimension(0, 0);
- int nmembers = target.getComponentCount();
- boolean firstVisibleComponent = true;
-
- for (int i = 0 ; i < nmembers ; i++)
- {
- Component m = target.getComponent(i);
-
- if (m.isVisible())
- {
- Dimension d = m.getPreferredSize();
- dim.width = Math.max(dim.width, d.width);
-
- if (firstVisibleComponent)
- {
- firstVisibleComponent = false;
- }
- else
- {
- dim.height += vgap;
- }
-
- dim.height += d.height;
- }
- }
-
- Insets insets = target.getInsets();
- dim.width += insets.left + insets.right + hgap*2;
- dim.height += insets.top + insets.bottom + vgap*2;
- return dim;
- }
- }
-
- /**
- * Returns the minimum dimensions needed to layout the <i>visible</i>
- * components contained in the specified target container.
- * @param target the container that needs to be laid out
- * @return the minimum dimensions to lay out the
- * subcomponents of the specified container
- * @see #preferredLayoutSize
- * @see java.awt.Container
- * @see java.awt.Container#doLayout
- */
- public Dimension minimumLayoutSize(Container target)
- {
- synchronized (target.getTreeLock())
- {
- Dimension dim = new Dimension(0, 0);
- int nmembers = target.getComponentCount();
- boolean firstVisibleComponent = true;
-
- for (int i = 0 ; i < nmembers ; i++)
- {
- Component m = target.getComponent(i);
- if (m.isVisible())
- {
- Dimension d = m.getMinimumSize();
- dim.width = Math.max(dim.width, d.width);
-
- if (firstVisibleComponent)
- {
- firstVisibleComponent = false;
- }
- else
- {
- dim.height += vgap;
- }
-
- dim.height += d.height;
- }
- }
-
-
- Insets insets = target.getInsets();
- dim.width += insets.left + insets.right + hgap*2;
- dim.height += insets.top + insets.bottom + vgap*2;
- return dim;
- }
- }
-
- /**
- * Lays out the container. This method lets each
- * <i>visible</i> component take
- * its preferred size by reshaping the components in the
- * target container in order to satisfy the alignment of
- * this <code>VerticalFlowLayout</code> object.
- *
- * @param target the specified component being laid out
- * @see Container
- * @see java.awt.Container#doLayout
- */
- public void layoutContainer(Container target)
- {
- synchronized (target.getTreeLock())
- {
- Insets insets = target.getInsets();
- int maxHeight = target.getSize().height - (insets.top + insets.bottom + vgap*2);
- int nmembers = target.getComponentCount();
- int x = insets.left + hgap;
- int y = 0;
- int columnWidth = 0;
- int start = 0;
-
- boolean ttb = target.getComponentOrientation().isLeftToRight();
-
- for (int i = 0 ; i < nmembers ; i++)
- {
- Component m = target.getComponent(i);
-
- if (m.isVisible())
- {
- Dimension d = m.getPreferredSize();
- m.setSize(d.width, d.height);
-
- if ((y == 0) || ((y + d.height) <= maxHeight))
- {
- if (y > 0)
- {
- y += vgap;
- }
-
- y += d.height;
- columnWidth = Math.max(columnWidth, d.width);
- }
- else
- {
- moveComponents(target, x, insets.top + vgap, columnWidth, maxHeight - y, start, i, ttb);
- y = d.height;
- x += hgap + columnWidth;
- columnWidth = d.width;
- start = i;
- }
- }
- }
-
- moveComponents(target, x, insets.top + vgap, columnWidth, maxHeight - y, start, nmembers, ttb);
- }
- }
-
- /**
- * Centers the elements in the specified row, if there is any slack.
- * @param target the component which needs to be moved
- * @param x the x coordinate
- * @param y the y coordinate
- * @param width the width dimensions
- * @param height the height dimensions
- * @param columnStart the beginning of the column
- * @param columnEnd the the ending of the column
- */
- private void moveComponents(
- Container target, int x, int y, int width, int height, int columnStart, int columnEnd, boolean ttb)
- {
- switch (align)
- {
- case TOP:
- y += ttb ? 0 : height;
- break;
- case CENTER:
- y += height / 2;
- break;
- case BOTTOM:
- y += ttb ? height : 0;
- break;
- }
-
- for (int i = columnStart ; i < columnEnd ; i++)
- {
- Component m = target.getComponent(i);
-
- if (m.isVisible())
- {
- int cx;
- cx = x + (width - m.getSize().width) / 2;
-
- if (ttb)
- {
- m.setLocation(cx, y);
- }
- else
- {
- m.setLocation(cx, target.getSize().height - y - m.getSize().height);
- }
-
- y += m.getSize().height + vgap;
- }
- }
- }
-
- /**
- * Returns a string representation of this <code>VerticalFlowLayout</code>
- * object and its values.
- * @return a string representation of this layout
- */
- public String toString()
- {
- String str = "";
-
- switch (align)
- {
- case TOP: str = ",align=top"; break;
- case CENTER: str = ",align=center"; break;
- case BOTTOM: str = ",align=bottom"; break;
- }
-
- return getClass().getName() + "[hgap=" + hgap + ",vgap=" + vgap + str + "]";
- }
-
-
- public static void main(String[] args)
- {
- JPanel main = new JPanel( new BorderLayout() );
-
- final JPanel buttons = new JPanel(new VerticalFlowLayout() );
-// buttons.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
- main.add(buttons, BorderLayout.CENTER);
-
- for (int i = 0; i < 7; i++)
- {
- buttons.add( new JRadioButton("button " + i) );
- }
-
- JButton button = new JButton("Add Radio Button");
- main.add(button, BorderLayout.SOUTH);
- button.addActionListener( new ActionListener()
- {
- private int i = 8;
-
- public void actionPerformed(ActionEvent e)
- {
- buttons.add( new JRadioButton("button R Us" + i++) );
- buttons.revalidate();
-// pack();
- }
- });
-
- JFrame frame = new JFrame();
- frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
- frame.add(main);
- frame.setSize(300, 300);
- frame.setLocationRelativeTo(null);
- frame.setVisible(true);
- }
-
-
-}
\ No newline at end of file
projects / gitblit.git / commitdiff