synthspinnerui.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

     * with the <code>createEditor</code> method.
     * 
     * @see #createEditor
     * @see #createPropertyChangeListener
     */
    protected void replaceEditor(JComponent oldEditor, JComponent newEditor) {
        spinner.remove(oldEditor);
        updateEditorAlignment(newEditor);
        spinner.add(newEditor, "Editor");
        if (oldEditor instanceof JSpinner.DefaultEditor) {
            JTextField tf = ((JSpinner.DefaultEditor)oldEditor).getTextField();
            if (tf != null) {
                tf.removeFocusListener(editorFocusHandler);
            }
        }
        if (newEditor instanceof JSpinner.DefaultEditor) {
            JTextField tf = ((JSpinner.DefaultEditor)newEditor).getTextField();
            if (tf != null) {
                tf.addFocusListener(editorFocusHandler);
            }
        }
    }

    private void updateEditorAlignment(JComponent editor) {
        if (editor instanceof JSpinner.DefaultEditor) {
            SynthContext context = getContext(spinner);
            Integer alignment = (Integer)context.getStyle().get(
                    context, "Spinner.editorAlignment");
            JTextField text = ((JSpinner.DefaultEditor)editor).getTextField();
            if (alignment != null) {
                text.setHorizontalAlignment(alignment);

            }
            // copy across the sizeVariant property to the editor
            text.putClientProperty("JComponent.sizeVariant",
                    spinner.getClientProperty("JComponent.sizeVariant"));
        }
    }

    public SynthContext getContext(JComponent c) {
        return getContext(c, getComponentState(c));
    }

    private SynthContext getContext(JComponent c, int state) {
        return SynthContext.getContext(SynthContext.class, c,
                    SynthLookAndFeel.getRegion(c), style, state);
    }


    private Region getRegion(JComponent c) {
        return SynthLookAndFeel.getRegion(c);
    }


    private int getComponentState(JComponent c) {
        return SynthLookAndFeel.getComponentState(c);
    }


    public void update(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        SynthLookAndFeel.update(context, g);
        context.getPainter().paintSpinnerBackground(context,
                          g, 0, 0, c.getWidth(), c.getHeight());
        paint(context, g);
        context.dispose();
    }


    public void paint(Graphics g, JComponent c) {
        SynthContext context = getContext(c);

        paint(context, g);
        context.dispose();
    }


    protected void paint(SynthContext context, Graphics g) {
    }

    public void paintBorder(SynthContext context, Graphics g, int x,
                            int y, int w, int h) {
        context.getPainter().paintSpinnerBorder(context, g, x, y, w, h);
    }

    /**
     * A simple layout manager for the editor and the next/previous buttons.
     * See the SynthSpinnerUI javadoc for more information about exactly
     * how the components are arranged.
     */
    private static class SpinnerLayout implements LayoutManager, UIResource
    {
        private Component nextButton = null;
        private Component previousButton = null;
        private Component editor = null;

        public void addLayoutComponent(String name, Component c) {
            if ("Next".equals(name)) {
                nextButton = c;
            }
            else if ("Previous".equals(name)) {
                previousButton = c;
            }
            else if ("Editor".equals(name)) {
                editor = c;
            }
        }

        public void removeLayoutComponent(Component c) {
            if (c == nextButton) {
                c = null;
            }
            else if (c == previousButton) {
                previousButton = null;
            }
            else if (c == editor) {
                editor = null;
            }
        }

        private Dimension preferredSize(Component c) {
            return (c == null) ? new Dimension(0, 0) : c.getPreferredSize();
        }

        public Dimension preferredLayoutSize(Container parent) {
            Dimension nextD = preferredSize(nextButton);
            Dimension previousD = preferredSize(previousButton);
            Dimension editorD = preferredSize(editor);

            /* Force the editors height to be a multiple of 2
             */
            editorD.height = ((editorD.height + 1) / 2) * 2;

            Dimension size = new Dimension(editorD.width, editorD.height);
            size.width += Math.max(nextD.width, previousD.width);
            Insets insets = parent.getInsets();
            size.width += insets.left + insets.right;
            size.height += insets.top + insets.bottom;
            return size;
        }

        public Dimension minimumLayoutSize(Container parent) {
            return preferredLayoutSize(parent);
        }

        private void setBounds(Component c, int x, int y, int width, int height) {
            if (c != null) {
                c.setBounds(x, y, width, height);
            }
        }

        public void layoutContainer(Container parent) {
            Insets insets = parent.getInsets();
            int availWidth = parent.getWidth() - (insets.left + insets.right);
            int availHeight = parent.getHeight() - (insets.top + insets.bottom);
            Dimension nextD = preferredSize(nextButton);
            Dimension previousD = preferredSize(previousButton);
            int nextHeight = availHeight / 2;
            int previousHeight = availHeight - nextHeight;
            int buttonsWidth = Math.max(nextD.width, previousD.width);
            int editorWidth = availWidth - buttonsWidth;

            /* Deal with the spinners componentOrientation property.
             */
            int editorX, buttonsX;
            if (parent.getComponentOrientation().isLeftToRight()) {
                editorX = insets.left;
                buttonsX = editorX + editorWidth;
            }
            else {
                buttonsX = insets.left;
                editorX = buttonsX + buttonsWidth;
            }

            int previousY = insets.top + nextHeight;
            setBounds(editor, editorX, insets.top, editorWidth, availHeight);
            setBounds(nextButton, buttonsX, insets.top, buttonsWidth, nextHeight);
            setBounds(previousButton, buttonsX, previousY, buttonsWidth, previousHeight);
        }
    }


    public void propertyChange(PropertyChangeEvent e) {
        String propertyName = e.getPropertyName();
        JSpinner spinner = (JSpinner)(e.getSource());
        SpinnerUI spinnerUI = spinner.getUI();
    
        if (spinnerUI instanceof SynthSpinnerUI) {
            SynthSpinnerUI ui = (SynthSpinnerUI)spinnerUI;
    
            if (SynthLookAndFeel.shouldUpdateStyle(e)) {
                ui.updateStyle(spinner);
            }
        }
    }

    /** Listen to editor text field focus changes and repaint whole spinner */
    private class EditorFocusHandler implements FocusListener{
        /** Invoked when a editor text field gains the keyboard focus. */
        public void focusGained(FocusEvent e) {
            spinner.repaint();
        }

        /** Invoked when a editor text field loses the keyboard focus. */
        public void focusLost(FocusEvent e) {
            spinner.repaint();
        }
    }

    /** Override the arrowbuttons focus handling to follow the text fields focus */
    private class SpinnerArrowButton extends SynthArrowButton{
        public SpinnerArrowButton(int direction) {
            super(direction);
        }

        @Override
        public boolean isFocusOwner() {
            if (spinner == null){
                return super.isFocusOwner();
            } else if (spinner.getEditor() instanceof JSpinner.DefaultEditor){
                return ((JSpinner.DefaultEditor)spinner.getEditor())
                        .getTextField().isFocusOwner();
            } else if (spinner.getEditor()!= null) {
                return spinner.getEditor().isFocusOwner();
            } else {
                return super.isFocusOwner();
            }
        }
    }
}