X-Git-Url: http://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fgui%2FGuiGridLayout.java;fp=src%2Ftim%2Fprune%2Fgui%2FGuiGridLayout.java;h=703f7dd1d1be00f6cca07525fe54ae28e9db125f;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/gui/GuiGridLayout.java b/src/tim/prune/gui/GuiGridLayout.java
new file mode 100644
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+++ b/src/tim/prune/gui/GuiGridLayout.java
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+package tim.prune.gui;
+
+import java.awt.GridBagConstraints;
+import java.awt.GridBagLayout;
+import java.awt.Insets;
+
+import javax.swing.JComponent;
+import javax.swing.JPanel;
+
+/**
+ * Class to make it easier to use GridBagLayout for a non-equal-width layout
+ * Default is two columns but can handle more
+ */
+public class GuiGridLayout
+{
+	private GridBagLayout _layout = null;
+	private GridBagConstraints _constraints = null;
+	private JPanel _panel = null;
+	private int _numColumns = 0;
+	private double[] _colWeights = null;
+	private boolean[] _rightAligns = null;
+	private int _x = 0;
+	private int _y = 0;
+
+	/**
+	 * Constructor
+	 * @param inPanel panel using layout
+	 */
+	public GuiGridLayout(JPanel inPanel)
+	{
+		// Default is two columns, with more weight to the right-hand one; first column is right-aligned
+		this(inPanel, null, null);
+	}
+
+	/**
+	 * Constructor
+	 * @param inPanel panel using layout
+	 * @param inColumnWeights array of column weights
+	 * @param inAlignRights array of booleans, true for right alignment, false for left
+	 */
+	public GuiGridLayout(JPanel inPanel, double[] inColumnWeights, boolean[] inAlignRights)
+	{
+		_panel = inPanel;
+		_layout = new GridBagLayout();
+		_constraints = new GridBagConstraints();
+		_colWeights = inColumnWeights;
+		_rightAligns = inAlignRights;
+		if (_colWeights == null || _rightAligns == null || _colWeights.length != _rightAligns.length
+			|| _colWeights.length < 2)
+		{
+			_colWeights = new double[] {0.5, 1.0};
+			_rightAligns = new boolean[] {true, false};
+		}
+		_numColumns = _colWeights.length;
+		_constraints.weightx = 1.0;
+		_constraints.weighty = 0.0;
+		_constraints.ipadx = 10;
+		_constraints.ipady = 1;
+		_constraints.insets = new Insets(1, 5, 1, 5);
+		// Apply layout to panel
+		_panel.setLayout(_layout);
+	}
+
+	/**
+	 * Add the given component to the grid
+	 * @param inComponent component to add
+	 */
+	public void add(JComponent inComponent)
+	{
+		_constraints.gridx = _x;
+		_constraints.gridy = _y;
+		_constraints.weightx = _colWeights[_x];
+		// set anchor
+		_constraints.anchor = (_rightAligns[_x]?GridBagConstraints.LINE_END:GridBagConstraints.LINE_START);
+		_layout.setConstraints(inComponent, _constraints);
+		// add to panel
+		_panel.add(inComponent);
+		// work out next position
+		_x++;
+		if (_x >= _numColumns) {
+			nextRow();
+		}
+	}
+
+	/**
+	 * Go to the next row of the grid
+	 */
+	public void nextRow()
+	{
+		_x = 0;
+		_y++;
+	}
+}