fixedverticalcellrenderer.java

ktable 是一个由java开发的,对控制报表的项目,它最大的特点是使用独特的算法,能支持巨大的报表(千万以上?).

/*
 * Copyright (C) 2004 by Friederich Kupzog Elektronik & Software
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 */
package de.kupzog.ktable.renderers;

import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;

import de.kupzog.ktable.KTableModel;
import de.kupzog.ktable.SWTX;

/**
 * Draws a cell in fixed style (understanding all the flags used in 
 * <code>FixedCellRenderer</code>. Draws the text vertically instead
 * of horizontally.
 * <p>
 * Accepted styles:
 * <ul>
 * <li><b>STYLE_FLAT</b> for a flat look.</li>
 * <li><b>STYLE_PUSH</b> for a button-like look.</li>
 * <li><b>INDICATION_SORT</b> if a sort indicator should be painted. Has only an effect 
 * when the <code>KTableModel</code> used is an
 * instance of <code>KTableSortedModel</code>. <br> 
 * Can be combined with <code>STYLE_FLAT</code> or <code>STYLE_PUSH</code> by or-ing.</li>
 * <li><b>INDICATION_FOCUS</b> when a focus bit should be colored differently. Combine by or-ing.
 * Note that the focus is only set to fixed cells when <code>
 * KTable.setHighlightSelectionInHeader(true)</code> is set.</li>
 * <li><b>INDICATION_FOCUS_ROW</b> when row-selection mode is on and the row highlighting should
 * be present in the fixed cell on the left. </li>
 * <li><b>INDICATION_CLICKED</b> shows a visible feedback when the user clicks on the cell.<br>
 * Only applicable if STYLE_PUSH is used.</li>
 * <li><b>SWT.BOLD</b> Makes the renderer draw bold text.</li>
 * <li><b>SWT.ITALIC</b> Makes the renderer draw italic text</li>
 * </ul>
 * 
 * @author Lorenz Maierhofer <[e-mail]>
 */
public class FixedVerticalCellRenderer extends FixedCellRenderer {

    /**
     * @param style
     */
    public FixedVerticalCellRenderer(int style) {
        super(style);
        setAlignment(SWTX.ALIGN_HORIZONTAL_RIGHT | SWTX.ALIGN_VERTICAL_BOTTOM | SWTX.WRAP);
    }

    /* (non-Javadoc)
     * @see de.kupzog.ktable.KTableCellRenderer#getOptimalWidth(org.eclipse.swt.graphics.GC, int, int, java.lang.Object, boolean)
     */
    public int getOptimalWidth(GC gc, int col, int row, Object content, boolean fixed, KTableModel model) {
        String text = SWTX.wrapText(gc, content.toString(), model.getRowHeight(row)-6);
        int w =  SWTX.getCachedStringExtent(gc, text).y;
        w+=6;
        return w;
    }
    
    /**
     * Draws the actual cell content (text & image).
     * @param gc The GC to use when painting.
     * @param rect The cell area.
     * @param text The text to draw.
     * @param textColor The text color.
     * @param backColor The background color to use.
     */
    protected void drawCellContent(GC gc, Rectangle rect, String text, Image img, 
            Color textColor, Color backColor) {
       applyFont(gc);
       drawVerticalCellContent(gc, rect, text, img, textColor, backColor);
       resetFont(gc);
    }
}