gridcellcombobox.java

PDBView是一个可以查看palmOS执行包*.pdb（类似于java包*.jar）结构的小工具

/* 
 * WExtLib - A class library for the Superwaba Virtual Machine
 * Copyright (C) 2005, Virgilio Alexandre Fornazin
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package wextlib.ui.grid;

import waba.fx.*;
import waba.ui.*;
import waba.sys.*;

/**
 * This class implements a default Grid Cell with combo-box style selection
 * 
 * @author Virgilio Alexandre Fornazin (mailto:[e-mail])
 */
public final class GridCellComboBox extends GridCell
{
	/** Valid chars */
	protected Object [] m_arrItems;
	
	/** In-place editor */
	private ComboBox m_Editor;
	
	/**
	 * Default constructor
	 */   
	public GridCellComboBox()
	{
		m_arrItems = null;
		
		m_Editor = null;
	}
	
	/**
	 * Get the vector of items for selection
	 */
	public Object [] getItems()
	{
		return m_arrItems;
	}
	
	/**
	 * Set the vector of items for selection
	 */
	public void setItems(Object [] arrItems)
	{
		int iCount = arrItems.length;
		m_arrItems = new Object [iCount];
		
		for (int i = 0; i < iCount; i++)
		{
			m_arrItems[i] = arrItems[i];
		}
	}
	
	public boolean supportEditing()
	{
		return true;
	}
	
	public boolean onStartEdit(Grid grid, GridCellID cellID, Rect cellRect, Color clrForeColor, Color clrBackColor, Font cellFont, int chrCode)
	{
		super.onStartEdit(grid, cellID, cellRect, clrForeColor, clrBackColor, cellFont, chrCode);
		
		m_Editor = new GridCellComboBoxEditor(m_arrItems);
		
		m_EditGrid.add(m_Editor);
		m_EditControl = m_Editor;
		
		m_Editor.setVisible(false);
		m_Editor.setRect(m_EditRect);

		if (m_EditBackColor != null)
		{
			m_Editor.setBackColor(m_EditBackColor);
		}
		
		if (m_EditForeColor != null)
		{
			m_Editor.setForeColor(m_EditForeColor);
		}
		
		if (m_EditFont != null)
		{
			m_Editor.setFont(m_EditFont);
		}
		
		m_Editor.select(m_Editor.indexOf(getCellText()));

		m_Editor.setVisible(true);
		m_Editor.requestFocus();
		
		return true;
	}
	
	public boolean onEndEdit()
	{
		if (m_Editor == null)
		{
			return false;
		}
		
		int iSel = m_Editor.getSelectedIndex();
		
		if (iSel == -1)
		{
			setCellText("");
		}
		else
		{
			setCellText(m_arrItems[iSel].toString());
		}
		
		m_Editor = null;
		
		m_EditGrid.remove(m_EditControl);
		m_EditControl = null;
		
		return true;
	}
	
	public void onPaint(GridCellDrawParams params)
	{
		if ((params.rcClip.width < 1) || (params.rcClip.height < 1))
		{
			return;
		}

		drawCellBackground(params);
		drawCellBorders(params);

		int iArrowWidth = params.font.getSize() * 3 / 11;
		int iComboWidth = iArrowWidth + 2;

		if (Settings.uiStyle == Settings.PalmOS)
		{
			params.graphics.drawArrow(params.rcClip.x, params.rcClip.y - 1 + (params.iCellHeight / 2) - 
					(iArrowWidth / 2), iArrowWidth, Graphics.ARROW_DOWN, false, true, Color.BLACK);
		}
		else // if (Settings.uiStyle == Settings.WinCE)
		{
			params.graphics.drawArrow(params.rcClip.x + params.rcClip.width - (iComboWidth + 3), params.rcClip.y - 1 + 
					(params.iCellHeight / 2) - (iArrowWidth / 2), iArrowWidth, Graphics.ARROW_DOWN, false, true, Color.BLACK);
		}
   	
		if (m_strCellText.length() > 0)
		{
			if (Settings.uiStyle == Settings.PalmOS)
			{
				params.rcClip.x += (iComboWidth + 1);
			}
			
			params.rcClip.width -= (iComboWidth + 1);
			params.iCellWidth -= (iComboWidth + 1);
			
			drawCellText(params);

			if (Settings.uiStyle == Settings.PalmOS)
			{
				params.rcClip.x -= (iComboWidth + 1);
			}
			
			params.rcClip.width += (iComboWidth + 1);
			params.iCellWidth += (iComboWidth + 1);
		}
	}
}