Exemplo n.º 1
0
		public void actionPerformed(ActionEvent evt)
		{
			JEditTextArea textArea = getTextArea(evt);
			int firstLine = textArea.getFirstLine();
			int visibleLines = textArea.getVisibleLines();
			int line = textArea.getCaretLine();

			if(firstLine < visibleLines)
				firstLine = visibleLines;

			textArea.setFirstLine(firstLine - visibleLines);

			int caret = textArea.getLineStartOffset(
				Math.max(0,line - visibleLines));
			if(select)
				textArea.select(textArea.getMarkPosition(),caret);
			else
				textArea.setCaretPosition(caret);
		}
Exemplo n.º 2
0
		public void actionPerformed(ActionEvent evt)
		{
			JEditTextArea textArea = getTextArea(evt);
			int lineCount = textArea.getLineCount();
			int firstLine = textArea.getFirstLine();
			int visibleLines = textArea.getVisibleLines();
			int line = textArea.getCaretLine();

			firstLine += visibleLines;

			if(firstLine + visibleLines >= lineCount - 1)
				firstLine = lineCount - visibleLines;

			textArea.setFirstLine(firstLine);

			int caret = textArea.getLineStartOffset(
				Math.min(textArea.getLineCount() - 1,
				line + visibleLines));
			if(select)
				textArea.select(textArea.getMarkPosition(),caret);
			else
				textArea.setCaretPosition(caret);
		}