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package org.apache.tapestry.contrib.table.components; |
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import org.apache.tapestry.IRequestCycle; |
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import org.apache.tapestry.contrib.table.model.ITableModelSource; |
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import org.apache.tapestry.util.ComponentAddress; |
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public abstract class TablePages extends AbstractTableViewComponent |
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{ |
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private int m_nDisplayPage; |
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public abstract int getPagesDisplayed(); |
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public int getDisplayPage() |
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{ |
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return m_nDisplayPage; |
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} |
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public void setDisplayPage(int displayPage) |
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{ |
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m_nDisplayPage = displayPage; |
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} |
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public int getCurrentPage() |
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{ |
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return getTableModelSource().getTableModel().getPagingState().getCurrentPage() + 1; |
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} |
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public int getPageCount() |
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{ |
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return getTableModelSource().getTableModel().getPageCount(); |
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} |
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public boolean getCondBack() |
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{ |
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return getCurrentPage() > 1; |
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} |
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public boolean getCondFwd() |
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{ |
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return getCurrentPage() < getPageCount(); |
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} |
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public boolean getCondCurrent() |
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{ |
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return getDisplayPage() == getCurrentPage(); |
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} |
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public int getStartPage() |
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{ |
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int nCurrent = getCurrentPage(); |
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int nPagesDisplayed = getPagesDisplayed(); |
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int nRightMargin = nPagesDisplayed / 2; |
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int nStop = nCurrent + nRightMargin; |
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int nLastPage = getPageCount(); |
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int nLeftAddon = 0; |
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if (nStop > nLastPage) |
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nLeftAddon = nStop - nLastPage; |
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int nLeftMargin = (nPagesDisplayed - 1) / 2 + nLeftAddon; |
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int nStart = nCurrent - nLeftMargin; |
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int nFirstPage = 1; |
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if (nStart < nFirstPage) |
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nStart = nFirstPage; |
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return nStart; |
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} |
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public int getStopPage() |
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{ |
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int nCurrent = getCurrentPage(); |
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int nPagesDisplayed = getPagesDisplayed(); |
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int nLeftMargin = (nPagesDisplayed - 1) / 2; |
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int nStart = nCurrent - nLeftMargin; |
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int nFirstPage = 1; |
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int nRightAddon = 0; |
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if (nStart < nFirstPage) |
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nRightAddon = nFirstPage - nStart; |
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int nRightMargin = nPagesDisplayed / 2 + nRightAddon; |
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int nStop = nCurrent + nRightMargin; |
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int nLastPage = getPageCount(); |
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if (nStop > nLastPage) |
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nStop = nLastPage; |
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return nStop; |
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} |
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public Integer[] getPageList() |
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{ |
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int nStart = getStartPage(); |
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int nStop = getStopPage(); |
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Integer[] arrPages = new Integer[nStop - nStart + 1]; |
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for (int i = nStart; i <= nStop; i++) |
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arrPages[i - nStart] = new Integer(i); |
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return arrPages; |
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} |
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public Object[] getFirstPageContext() |
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{ |
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ComponentAddress objAddress = new ComponentAddress(getTableModelSource()); |
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return new Object[] { objAddress, new Integer(1)}; |
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} |
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public Object[] getLastPageContext() |
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{ |
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ComponentAddress objAddress = new ComponentAddress(getTableModelSource()); |
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return new Object[] { objAddress, new Integer(getPageCount())}; |
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} |
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public Object[] getBackPageContext() |
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{ |
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ComponentAddress objAddress = new ComponentAddress(getTableModelSource()); |
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return new Object[] { objAddress, new Integer(getCurrentPage() - 1)}; |
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} |
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public Object[] getFwdPageContext() |
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{ |
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ComponentAddress objAddress = new ComponentAddress(getTableModelSource()); |
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return new Object[] { objAddress, new Integer(getCurrentPage() + 1)}; |
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} |
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public Object[] getDisplayPageContext() |
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{ |
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ComponentAddress objAddress = new ComponentAddress(getTableModelSource()); |
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return new Object[] { objAddress, new Integer(m_nDisplayPage)}; |
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} |
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public void changePage(IRequestCycle objCycle) |
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{ |
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Object[] arrParameters = objCycle.getListenerParameters(); |
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if (arrParameters.length != 2 |
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&& !(arrParameters[0] instanceof ComponentAddress) |
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&& !(arrParameters[1] instanceof Integer)) |
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{ |
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return; |
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} |
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ComponentAddress objAddress = (ComponentAddress)arrParameters[0]; |
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ITableModelSource objSource = (ITableModelSource)objAddress.findComponent(objCycle); |
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int page = ((Integer)arrParameters[1]).intValue(); |
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objSource.storeTableAction(new TableActionPageChange(page)); |
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} |
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public void setCurrentPage(ITableModelSource objSource, int nPage) |
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{ |
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objSource.getTableModel().getPagingState().setCurrentPage(nPage - 1); |
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} |
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} |