Affichage d'un tableau (modifiable) representant un emploi du temps

On peut faire ça avec un GridBagLayout est des JPanel (La première solution qui pourrait venir à l'esprit est la JTable, mais la gestion des headers risquent d'être compliquées et pleines d'effet de bord). Avec un GridBagLayout c'est relativement simple, quand on le connait bien.

Regarde cet exemple :
Code:
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public class ArrayPanel extends JPanel {
 
	private static final long serialVersionUID = 1L;
 
	private static final Insets INSETS_VER = new Insets(10, 0, 10, 0);
	private static final Insets INSETS_HOR= new Insets(0, 10, 0, 10);
	private static final Insets INSETS= new Insets(1, 1, 0, 0);
 
	private int rowCount;
	private int columnCount;
 
	private Color lineColor;
	private boolean grid;
 
	public ArrayPanel() {
		super(new GridBagLayout());
		lineColor=Color.WHITE;
	}
 
	public void setLineColor(Color color) {
		if ( color==null ) {
			color=Color.WHITE;
		}
		this.lineColor=color;
		repaint();
	}
 
	@Override
	public void setForeground(Color fg) {
		super.setForeground(fg);
		for(int row=0; row<rowCount; row++) {
			JLabel jlabel =  (JLabel)getComponent(0, row+1);
			jlabel.setForeground(fg);
		}
		for(int column=0; column<columnCount; column++) {
			JLabel jlabel =  (JLabel)getComponent(column+1,0);
			jlabel.setForeground(fg);
		}
	}
 
	@Override
	public void setFont(Font font) {
		super.setFont(font);
		for(int row=0; row<rowCount; row++) {
			JLabel jlabel =  (JLabel)getComponent(0, row+1);
			jlabel.setFont(font);
		}
		for(int column=0; column<columnCount; column++) {
			JLabel jlabel =  (JLabel)getComponent(column+1,0);
			jlabel.setFont(font);
		}
	}
 
	public void setGridVisible(boolean grid) {
		this.grid=grid;
		repaint();
	}
 
	public boolean isGridVisible() {
		return grid;
	}
 
	@Override
	public void paint(Graphics g) {
		super.paint(g);
		g.setColor(lineColor);
		if ( columnCount>0 ) {
			int headerWidth=0;
			if (!grid && rowCount>0) {
				JLabel jlabel =  (JLabel)getComponent(0,1);
				headerWidth=jlabel.getWidth();
			}
			for(int i=0; i<=rowCount; i++) {
				Component component = getComponent(1,i);
				if( component==null) continue;
				if ( grid || i==0 ) {
					if ( i==0 ) g.drawLine(0, component.getY(), getWidth(), component.getY());
					g.drawLine(0, component.getY()+component.getHeight(), getWidth(), component.getY()+component.getHeight());
				}
				else {
					if ( i==0 ) g.drawLine(0, component.getY(), headerWidth, component.getY());
					g.drawLine(0, component.getY()+component.getHeight(), headerWidth, component.getY()+component.getHeight());
				}
			}
		}
		if ( rowCount>0 ) {
			int headerHeight=0;
			if (!grid && columnCount>0) {
				JLabel jlabel =  (JLabel)getComponent(1,0);
				headerHeight=jlabel.getHeight();
			}
			for(int i=0; i<=columnCount; i++) {
				Component component = getComponent(i, 1);
				if( component==null) continue;
				if ( grid || i==0 ) {
					if ( i==0 ) g.drawLine(component.getX(), 0, component.getX(), getHeight());
					g.drawLine(component.getX()+component.getWidth(), 0, component.getX()+component.getWidth(), getHeight());
				}
				else {
					if ( i==0 ) g.drawLine(component.getX(), 0, component.getX(), headerHeight);
					g.drawLine(component.getX()+component.getWidth(), 0, component.getX()+component.getWidth(), headerHeight);
				}
			}
		}
	}
 
	public void addRow(String label) {
		if ( label==null ) {
			label="";
		}
		int newRow = ++rowCount;
		createRow(label, newRow);
	}
 
	protected JLabel createRow(String label, int newRow) {
		JLabel jlabel = createJLabel(label);
		jlabel.setUI(new VerticalLabelUI(false));
		add(jlabel, new GridBagConstraints(0, newRow, 1, 1, 0, 0, GridBagConstraints.CENTER, GridBagConstraints.CENTER, INSETS_VER, 0, 0));
		fillRow(newRow);
		revalidate();
		repaint();
		return jlabel;
	}
 
	public void addRow(String label, int row) {
		if ( row<0 || row>rowCount ) {
			throw new IndexOutOfBoundsException();
		}
		else if ( row==rowCount ) {
			addRow(label);
		}
		else {
			if ( label==null ) {
				label="";
			}
 
			GridBagLayout layout = (GridBagLayout) getLayout();
			for(int i=columnCount; i>=0; i--) {
				for(int j=rowCount; j>=row; j--) {
					Component component = getComponent(i,j);
					GridBagConstraints gbc = layout.getConstraints(component);
					gbc.gridy++;
					layout.setConstraints(component, gbc);
				}
			}
			rowCount++;
			createRow(label, row);
		}
	}
 
	protected JLabel createJLabel(String label) {
		JLabel jlabel = new JLabel(label, JLabel.CENTER);
		jlabel.setForeground(getForeground());
		jlabel.setFont(getFont());
		return jlabel;
	}
 
	private void fillRow(int newRow) {
		for(int i=1; i<=columnCount; i++) {
			add( new JPanel(), new GridBagConstraints(i, newRow, 1, 1, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.BOTH, INSETS, 0, 0));
		}
	}
 
	public void addColumn(String label) {
		if ( label==null ) {
			label="";
		}
		int newColumn = ++columnCount;
		createColumn(label, newColumn);
	}
 
	protected JLabel createColumn(String label, int newColumn) {
		JLabel jlabel = createJLabel(label);
		add(jlabel, new GridBagConstraints(newColumn, 0, 1, 1, 0, 0, GridBagConstraints.CENTER, GridBagConstraints.CENTER, INSETS_HOR, 0, 0));
		fillColumn(newColumn);
		revalidate();
		repaint();
		return jlabel;
	}
 
	private void fillColumn(int newColumn) {
		for(int i=1; i<=rowCount; i++) {
			add( new JPanel(), new GridBagConstraints(newColumn, i, 1, 1, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.BOTH, INSETS, 0, 0));
		}
	}
 
 
	public void addColumn(String label, int column) {
		if ( column<0 || column>columnCount ) {
			throw new IndexOutOfBoundsException();
		}
		else if ( column==columnCount ) {
			addColumn(label);
		}
		else {
			if ( label==null ) {
				label="";
			}
 
			GridBagLayout layout = (GridBagLayout) getLayout();
			for(int i=rowCount; i>=0; i--) {
				for(int j=columnCount; j>=column; j--) {
					Component component = getComponent(j,i);
					GridBagConstraints gbc = layout.getConstraints(component);
					gbc.gridx++;
					layout.setConstraints(component, gbc);
				}
			}
			columnCount++;
			createColumn(label, column);
		}
	}
 
	public void swapRow(int row1, int row2) {
		if ( row1<0 || row1>=rowCount || row2<0 || row2>=rowCount ) throw new IndexOutOfBoundsException();
		if ( row1==row2 ) return;
		if ( row1<row2 ) {
			swapRow(row2, row1);
			return;
		}
		GridBagLayout layout = (GridBagLayout) getLayout();
		for(int i=columnCount; i>=0; i--) {
			Component component1 = getComponent(i,row1+1);
			GridBagConstraints gbc1 = layout.getConstraints(component1);
			gbc1.gridy=row2+1;
			layout.setConstraints(component1, gbc1);
			Component component2 = getComponent(i,row2+1);
			GridBagConstraints gbc2 = layout.getConstraints(component2);
			gbc2.gridy=row1+1;
			layout.setConstraints(component2, gbc2);
		}
		revalidate();
		repaint();
	}
 
	public void swapColumn(int column1, int column2) {
		if ( column1<0 || column1>=columnCount || column2<0 || column2>=columnCount ) throw new IndexOutOfBoundsException();
		if ( column1==column2 ) return;
		if ( column1<column2) {
			swapColumn(column2, column1);
			return;
		}
		GridBagLayout layout = (GridBagLayout) getLayout();
		for(int i=rowCount; i>=0; i--) {
			Component component1 = getComponent(column1+1,i);
			GridBagConstraints gbc1 = layout.getConstraints(component1);
			gbc1.gridx=column2+1;
			layout.setConstraints(component1, gbc1);
			Component component2 = getComponent(column2+1,i);
			GridBagConstraints gbc2 = layout.getConstraints(component2);
			gbc2.gridx=column1+1;
			layout.setConstraints(component2, gbc2);
		}
		revalidate();
		repaint();
	}
 
	public void setRowLabel(String label, int row) {
		if ( row<0 || row>=rowCount ) throw new IndexOutOfBoundsException();
		if ( label==null ) {
			label="";
		}
		JLabel jlabel =  (JLabel)getComponent(0, row+1);
		jlabel.setText(label);
		revalidate();
		repaint();
	}
 
	public void setColumnLabel(String label, int column) {
		if ( column<0 || column>=columnCount ) throw new IndexOutOfBoundsException();
		if ( label==null ) {
			label="";
		}
		JLabel jlabel =  (JLabel)getComponent(column+1, 0);
		jlabel.setText(label);
		revalidate();
		repaint();
	}
 
	public void removeRow(int row) {
		if ( row<0 || row>=rowCount ) throw new IndexOutOfBoundsException();
		for(int i=columnCount; i>=0; i--) {
			Component component = getComponent(i,row+1);
			remove(component);
		}
		GridBagLayout layout = (GridBagLayout) getLayout();
		for(int i=columnCount; i>=0; i--) {
			for(int j=row+2; j<=rowCount; j++) {
				Component component = getComponent(i,j);
				GridBagConstraints gbc = layout.getConstraints(component);
				gbc.gridy--;
				layout.setConstraints(component, gbc);
			}
		}
		rowCount--;
		revalidate();
		repaint();
	}
 
	public void removeColumn(int column) {
		if ( column<0 || column>=columnCount ) throw new IndexOutOfBoundsException();
		for(int i=rowCount; i>=0; i--) {
			Component component = getComponent(column+1, i);
			remove(component);
		}
		GridBagLayout layout = (GridBagLayout) getLayout();
		for(int i=rowCount; i>=0; i--) {
			for(int j=column+2; j<=columnCount; j++) {
				Component component = getComponent(j,i);
				GridBagConstraints gbc = layout.getConstraints(component);
				gbc.gridx--;
				layout.setConstraints(component, gbc);
			}
		}
		columnCount--;
		revalidate();
		repaint();
	}
 
	public int getRowCount() {
		return rowCount;
	}
 
	public int getColumnCount() {
		return columnCount;
	}
 
	public void setPanel(JPanel panel, int row, int column) {
		if ( row<0 || row>=rowCount || column<0 || column>=columnCount ) throw new IndexOutOfBoundsException();
		removeComponentAt(column+1, row+1);
		add(panel, new GridBagConstraints(column+1, row+1, 1, 1, 1, 1, GridBagConstraints.CENTER, GridBagConstraints.BOTH, INSETS, 0, 0));
		revalidate();
		repaint();
	}
 
	private void removeComponentAt(int column, int row) {
		Component component = getComponent(row, column);
		if ( component!=null ) {
			remove(component);
		}
	}
 
	private Component getComponent(int column, int row) {
		for(Component component : getComponents()) {
			GridBagConstraints gbc = ((GridBagLayout)getLayout()).getConstraints(component);
			if ( gbc.gridx==column && gbc.gridy==row ) {
				return component;
			}
		}
		return null;
	}
 
}