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Diffstat (limited to 'libjava/classpath/javax/swing/text/FieldView.java')
| -rw-r--r-- | libjava/classpath/javax/swing/text/FieldView.java | 310 |
1 files changed, 0 insertions, 310 deletions
diff --git a/libjava/classpath/javax/swing/text/FieldView.java b/libjava/classpath/javax/swing/text/FieldView.java deleted file mode 100644 index c47bef9..0000000 --- a/libjava/classpath/javax/swing/text/FieldView.java +++ /dev/null @@ -1,310 +0,0 @@ -/* FieldView.java -- - Copyright (C) 2004, 2006 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package javax.swing.text; - -import java.awt.Component; -import java.awt.Container; -import java.awt.FontMetrics; -import java.awt.Graphics; -import java.awt.Insets; -import java.awt.Rectangle; -import java.awt.Shape; - -import javax.swing.BoundedRangeModel; -import javax.swing.JTextField; -import javax.swing.SwingUtilities; -import javax.swing.event.ChangeEvent; -import javax.swing.event.ChangeListener; -import javax.swing.event.DocumentEvent; - -public class FieldView extends PlainView -{ - BoundedRangeModel horizontalVisibility; - - /** Caches the preferred span of the X axis. It is invalidated by - * setting it to -1f. This is done when text in the document - * is inserted, removed or changed. The value is corrected as - * soon as calculateHorizontalSpan() is called. - */ - float cachedSpan = -1f; - - public FieldView(Element elem) - { - super(elem); - - } - - /** Checks whether the given container is a JTextField. If so - * it retrieves the textfield's horizontalVisibility instance. - * - * <p>This method should be only called when the view's container - * is valid. Naturally that would be the setParent() method however - * that method is not overridden in the RI and that is why we chose - * paint() instead.</p> - */ - private void checkContainer() - { - Container c = getContainer(); - - if (c instanceof JTextField) - { - horizontalVisibility = ((JTextField) c).getHorizontalVisibility(); - - // Provokes a repaint when the BoundedRangeModel's values change - // (which is what the RI does). - horizontalVisibility.addChangeListener(new ChangeListener(){ - public void stateChanged(ChangeEvent event) { - getContainer().repaint(); - } - }); - - // It turned out that the span calculated at this point is wrong - // and needs to be recalculated (e.g. a different font setting is - // not taken into account). - calculateHorizontalSpan(); - - // Initializes the BoundedRangeModel properly. - updateVisibility(); - } - - } - - private void updateVisibility() - { - JTextField tf = (JTextField) getContainer(); - Insets insets = tf.getInsets(); - - int width = tf.getWidth() - insets.left - insets.right; - - horizontalVisibility.setMaximum(Math.max((int) ((cachedSpan != -1f) - ? cachedSpan - : calculateHorizontalSpan()), - width)); - - horizontalVisibility.setExtent(width - 1); - } - - protected FontMetrics getFontMetrics() - { - Component container = getContainer(); - return container.getFontMetrics(container.getFont()); - } - - /** - * Vertically centers the single line of text within the - * bounds of the input shape. The returned Rectangle is centered - * vertically within <code>shape</code> and has a height of the - * preferred span along the Y axis. Horizontal adjustment is done according - * to the horizontalAligment property of the component that is rendered. - * - * @param shape the shape within which the line is beeing centered - */ - protected Shape adjustAllocation(Shape shape) - { - // Return null when the original allocation is null (like the RI). - if (shape == null) - return null; - - Rectangle rectIn = shape.getBounds(); - // vertical adjustment - int height = (int) getPreferredSpan(Y_AXIS); - int y = rectIn.y + (rectIn.height - height) / 2; - // horizontal adjustment - JTextField textField = (JTextField) getContainer(); - int width = (int) ((cachedSpan != -1f) ? cachedSpan : calculateHorizontalSpan()); - int x; - if (horizontalVisibility != null && horizontalVisibility.getExtent() < width) - x = rectIn.x - horizontalVisibility.getValue(); - else - switch (textField.getHorizontalAlignment()) - { - case JTextField.CENTER: - x = rectIn.x + (rectIn.width - width) / 2; - break; - case JTextField.RIGHT: - x = rectIn.x + (rectIn.width - width - 1); - break; - case JTextField.TRAILING: - if (textField.getComponentOrientation().isLeftToRight()) - x = rectIn.x + (rectIn.width - width - 1); - else - x = rectIn.x; - break; - case JTextField.LEADING: - if (textField.getComponentOrientation().isLeftToRight()) - x = rectIn.x; - else - x = rectIn.x + (rectIn.width - width - 1); - break; - case JTextField.LEFT: - default: - x = rectIn.x; - break; - } - - return new Rectangle(x, y, width, height); - } - - public float getPreferredSpan(int axis) - { - if (axis != X_AXIS && axis != Y_AXIS) - throw new IllegalArgumentException(); - - - if (axis == Y_AXIS) - return super.getPreferredSpan(axis); - - if (cachedSpan != -1f) - return cachedSpan; - - return calculateHorizontalSpan(); - } - - /** Calculates and sets the horizontal span and stores the value - * in cachedSpan. - */ - private float calculateHorizontalSpan() - { - Segment s = getLineBuffer(); - Element elem = getElement(); - - try - { - elem.getDocument().getText(elem.getStartOffset(), - elem.getEndOffset() - 1, - s); - - return cachedSpan = Utilities.getTabbedTextWidth(s, getFontMetrics(), 0, this, s.offset); - } - catch (BadLocationException e) - { - // Should never happen - AssertionError ae = new AssertionError(); - ae.initCause(e); - throw ae; - } - } - - public int getResizeWeight(int axis) - { - return axis == X_AXIS ? 1 : 0; - } - - public Shape modelToView(int pos, Shape a, Position.Bias bias) - throws BadLocationException - { - Shape newAlloc = adjustAllocation(a); - return super.modelToView(pos, newAlloc, bias); - } - - public void paint(Graphics g, Shape s) - { - if (horizontalVisibility == null) - checkContainer(); - - Shape newAlloc = adjustAllocation(s); - - Shape clip = g.getClip(); - if (clip != null) - { - // Reason for this: The allocation area is always determined by the - // size of the component (and its insets) regardless of whether - // parts of the component are invisible or not (e.g. when the - // component is part of a JScrollPane and partly moved out of - // the user-visible range). However the clip of the Graphics - // instance may be adjusted properly to that condition but - // does not handle insets. By calculating the intersection - // we get the correct clip to paint the text in all cases. - Rectangle r = s.getBounds(); - Rectangle cb = clip.getBounds(); - SwingUtilities.computeIntersection(r.x, r.y, r.width, r.height, cb); - - g.setClip(cb); - } - else - g.setClip(s); - - super.paint(g, newAlloc); - g.setClip(clip); - - } - - public void insertUpdate(DocumentEvent ev, Shape shape, ViewFactory vf) - { - cachedSpan = -1f; - - if (horizontalVisibility != null) - updateVisibility(); - - Shape newAlloc = adjustAllocation(shape); - - super.insertUpdate(ev, newAlloc, vf); - getContainer().repaint(); - } - - public void removeUpdate(DocumentEvent ev, Shape shape, ViewFactory vf) - { - cachedSpan = -1f; - - if (horizontalVisibility != null) - updateVisibility(); - - Shape newAlloc = adjustAllocation(shape); - super.removeUpdate(ev, newAlloc, vf); - getContainer().repaint(); - } - - public void changedUpdate(DocumentEvent ev, Shape shape, ViewFactory vf) - { - cachedSpan = -1f; - - if (horizontalVisibility != null) - updateVisibility(); - - Shape newAlloc = adjustAllocation(shape); - super.changedUpdate(ev, newAlloc, vf); - getContainer().repaint(); - } - - public int viewToModel(float fx, float fy, Shape a, Position.Bias[] bias) - { - return super.viewToModel(fx, fy, adjustAllocation(a), bias); - } - -} |