Example usage for com.google.gwt.dom.client TextAreaElement getClientHeight

Introduction

In this page you can find the example usage for com.google.gwt.dom.client TextAreaElement getClientHeight.

Prototype

@Override
    public int getClientHeight() 

Source Link

Usage

From source file:org.opencms.ui.client.CmsAutoGrowingTextAreaConnector.java

License:Open Source License

/**
 * Resize the text area.<p>/*from w  ww.  j a v  a  2 s  . c  o m*/
 */
protected void handle() {

    Element e = m_widget.getElement();
    if (e instanceof TextAreaElement) {
        TextAreaElement elem = (TextAreaElement) e;
        int scrollHeight = elem.getScrollHeight();
        // allow text area to shrink
        if (m_lastValue.length() > elem.getValue().length()) {
            elem.setRows(getState().getMinRows());
        }
        int currentRows = elem.getRows();
        if (m_lineHeight == 0) {
            elem.setRows(2);
            int heightTwo = elem.getClientHeight();
            elem.setRows(1);
            int heightOne = elem.getClientHeight();
            m_lineHeight = heightTwo - heightOne;
            m_paddingHeight = heightOne - m_lineHeight;
            elem.setRows(currentRows);
        }
        if (m_lineHeight > 0) {
            int totalHeight = scrollHeight - m_paddingHeight;
            int requiredRows = ((scrollHeight - m_paddingHeight) / m_lineHeight);
            if ((totalHeight % m_lineHeight) > 0) {
                requiredRows++;
            }
            int minRows = getState().getMinRows();
            int maxRows = getState().getMaxRows();
            if ((requiredRows <= minRows) && (currentRows != minRows)) {
                elem.setRows(minRows);
            } else if ((requiredRows >= maxRows) && (currentRows != maxRows)) {
                elem.setRows(maxRows);
            } else if (requiredRows != currentRows) {
                elem.setRows(requiredRows);
            }
        }
    }
}

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