Java JTextComponent.requestFocus方法代码示例

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
public void showPopupMenu(int x, int y) {
    // First call the build-popup-menu action to possibly rebuild the popup menu
    JTextComponent c = getComponent();
    if (c != null) {
        BaseKit kit = Utilities.getKit(c);
        if (kit != null) {
            Action a = kit.getActionByName(ExtKit.buildPopupMenuAction);
            if (a != null) {
                a.actionPerformed(new ActionEvent(c, 0, "")); // NOI18N
            }
        }

        JPopupMenu pm = getPopupMenu();
        if (pm != null) {
            if (c.isShowing()) { // fix of #18808
                if (!c.isFocusOwner()) {
                    c.requestFocus();
                }
                pm.show(c, x, y);
            }
        }
    }
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
/**
 * Loads the contents of a selected file into a text component.
 *
 * @param id
 * @param textComponent
 */
private void loadFileToTextArea(String id, JTextComponent textComponent) {
    logger.info("Loading " + id + "...");
    try {
        if (TextComponentUtil.open(textComponent)) {
            textComponent.requestFocus();
            textComponent.setCaretPosition(0);
            logger.info("Finished loading " + id);
        } else {
            logger.info("Canceled loading " + id);
        }
    } catch (Exception e) {
        String message = "Failed loading " + id + ": " + e.getMessage();
        logger.log(Level.SEVERE, message, e);
        showErrorMessage(message);
    }
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
/**
 * Copies the text contents of the system clipboard to the text component.
 *
 * @param textComponent
 */
public static void paste(JTextComponent textComponent) {
    String contents = ClipboardHandlerFactory.getClipboardHandler()
            .getContents();
    if (contents != null) {
        StringBuffer buffer = new StringBuffer();
        char c;
        for (int i = 0, n = contents.length(); i < n; i++) {
            c = contents.charAt(i);
            // Not to copy a null character
            if (c != 0) {
                buffer.append(c);
            }
        }
        textComponent.replaceSelection(buffer.toString());
    }
    if (!textComponent.hasFocus()) {
        textComponent.requestFocus();
    }
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
@Override
public void mouseClicked(MouseEvent e) {
    if (e.getModifiers() == InputEvent.BUTTON3_MASK) {
        if (!(e.getSource() instanceof JTextComponent)) {
            return;
        }

        textComponent = (JTextComponent) e.getSource();
        textComponent.requestFocus();

        boolean enabled = textComponent.isEnabled();
        boolean editable = textComponent.isEditable();
        boolean nonempty = !(textComponent.getText() == null || textComponent.getText().equals(""));
        boolean marked = textComponent.getSelectedText() != null;

        boolean pasteAvailable = Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null).isDataFlavorSupported(DataFlavor.stringFlavor);

        undoAction.setEnabled(enabled && editable && (lastActionSelected == Actions.CUT || lastActionSelected == Actions.PASTE));
        cutAction.setEnabled(enabled && editable && marked);
        copyAction.setEnabled(enabled && marked);
        pasteAction.setEnabled(enabled && editable && pasteAvailable);
        selectAllAction.setEnabled(enabled && nonempty);

        int nx = e.getX();

        if (nx > 500) {
            nx = nx - popup.getSize().width;
        }

        popup.show(e.getComponent(), nx, e.getY() - popup.getSize().height);
    }
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
public static void requestFocus(JTextComponent c) {
    if (c != null) {
        if (!ImplementationProvider.getDefault().activateComponent(c)) {
            Frame f = EditorUI.getParentFrame(c);
            if (f != null) {
                f.requestFocus();
            }
            c.requestFocus();
        }
    }
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
public static void requestFocus(JTextComponent c) {
    if (c != null) {
        if (!EditorImplementation.getDefault().activateComponent(c)) {
            Frame f = getParentFrame(c);
            if (f != null) {
                f.requestFocus();
            }
            c.requestFocus();
        }
    }
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
private void prepareEditor() {
    Component c = getEditor().getEditorComponent();

    if (c instanceof JTextComponent) {
        JTextComponent jtc = (JTextComponent) c;
        String s = jtc.getText();

        if ((s != null) && (s.length() > 0)) {
            jtc.setSelectionStart(0);
            jtc.setSelectionEnd(s.length());
        }

        if (tableUI) {
            jtc.setBackground(getBackground());
        } else {
            jtc.setBackground(PropUtils.getTextFieldBackground());
        }
        if( tableUI )
            jtc.requestFocus();
    }

    if (getLayout() != null) {
        getLayout().layoutContainer(this);
    }

    repaint();
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
@Override public boolean marathon_select(String value) {
    JTextComponent tc = (JTextComponent) component;
    tc.requestFocus();
    Boolean clientProperty = (Boolean) tc.getClientProperty("marathon.celleditor");
    clear();
    if (clientProperty != null && clientProperty) {
        sendKeys(value, JavaAgentKeys.ENTER);
    } else {
        sendKeys(value);
    }
    return true;
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
/**
 * Selects all contents of a text component.
 *
 * @param textComponent
 */
public static void selectAll(JTextComponent textComponent) {
    if (!textComponent.hasFocus()) {
        textComponent.requestFocus();
    }
    textComponent.selectAll();
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
@Override
public void actionPerformed(ActionEvent e) {
    if (ignoreComboAction)
        return; // not invoked by user, ignore

    GuardedBlock gBlock = codeData.getGuardedBlock(category, blockIndex);
    GuardBlockInfo gInfo = getGuardInfos(category)[blockIndex];
    int[] blockBounds = getGuardBlockBounds(category, blockIndex);
    int startOffset = blockBounds[0];
    int endOffset = blockBounds[1];
    int gHead = gBlock.getHeaderLength();
    int gFoot = gBlock.getFooterLength();
    JTextComponent editor = getEditor(category);
    StyledDocument doc = (StyledDocument) editor.getDocument();

    changed = true;

    JComboBox combo = (JComboBox) e.getSource();
    try {
        docListener.setActive(false);
        if (combo.getSelectedIndex() == 1) { // changing from default to custom
            NbDocument.unmarkGuarded(doc, startOffset, endOffset - startOffset);
            // keep last '\n' so we don't destroy next editable block's position
            doc.remove(startOffset, endOffset - startOffset - 1);
            // insert the custom code into the document
            String customCode = gBlock.getCustomCode();
            int customLength = customCode.length();
            if (gInfo.customizedCode != null) { // already was edited before
                customCode = customCode.substring(0, gHead)
                             + gInfo.customizedCode
                             + customCode.substring(customLength - gFoot);
                customLength = customCode.length();
            }
            if (customCode.endsWith("\n")) // NOI18N
                customCode = customCode.substring(0, customLength-1);
            doc.insertString(startOffset, customCode, null);
            gInfo.customized = true;
            // make guarded "header" and "footer", select the text in between
            NbDocument.markGuarded(doc, startOffset, gHead);
            NbDocument.markGuarded(doc, startOffset + customLength - gFoot, gFoot);
            editor.setSelectionStart(startOffset + gHead);
            editor.setSelectionEnd(startOffset + customLength - gFoot);
            editor.requestFocus();
            combo.setToolTipText(gBlock.getCustomEntry().getToolTipText());
        }
        else { // changing from custom to default
            // remember the customized code
            gInfo.customizedCode = doc.getText(startOffset + gHead,
                                               endOffset - gFoot - gHead - startOffset);
            NbDocument.unmarkGuarded(doc, endOffset - gFoot, gFoot);
            NbDocument.unmarkGuarded(doc, startOffset, gHead);
            // keep last '\n' so we don't destroy next editable block's position
            doc.remove(startOffset, endOffset - startOffset - 1);
            String defaultCode = gBlock.getDefaultCode();
            if (defaultCode.endsWith("\n")) // NOI18N
                defaultCode = defaultCode.substring(0, defaultCode.length()-1);
            doc.insertString(startOffset, defaultCode, null);
            gInfo.customized = false;
            // make the whole text guarded, cancel selection
            NbDocument.markGuarded(doc, startOffset, defaultCode.length()+1); // including '\n'
            if (editor.getSelectionStart() >= startOffset && editor.getSelectionEnd() <= endOffset)
                editor.setCaretPosition(startOffset);
            combo.setToolTipText(NbBundle.getMessage(CustomCodeData.class, "CTL_GuardCombo_Default_Hint")); // NOI18N
        }
        // we must create a new Position - current was moved away by inserting new string on it
        gInfo.position = NbDocument.createPosition(doc, startOffset, Position.Bias.Forward);

        docListener.setActive(true);
    }
    catch (BadLocationException ex) { // should not happen
        ErrorManager.getDefault().notify(ErrorManager.INFORMATIONAL, ex);
    }
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
@Override
public void mousePressed(MouseEvent evt) {
    if (LOG.isLoggable(Level.FINE)) {
        LOG.fine("mousePressed: " + logMouseEvent(evt) + ", state=" + mouseState + '\n'); // NOI18N
    }

    JTextComponent c = component;
    if (c != null && isLeftMouseButtonExt(evt)) {
        // Expand fold if offset is in collapsed fold
        int offset = mouse2Offset(evt);
        switch (evt.getClickCount()) {
            case 1: // Single press
                if (c.isEnabled() && !c.hasFocus()) {
                    c.requestFocus();
                }
                c.setDragEnabled(true);
                if (evt.isShiftDown()) { // Select till offset
                    moveDot(offset);
                    adjustRectangularSelectionMouseX(evt.getX(), evt.getY()); // also fires state change
                    mouseState = MouseState.CHAR_SELECTION;
                } else { // Regular press
                    // check whether selection drag is possible
                    if (isDragPossible(evt) && mapDragOperationFromModifiers(evt) != TransferHandler.NONE) {
                        mouseState = MouseState.DRAG_SELECTION_POSSIBLE;
                    } else { // Drag not possible
                        mouseState = MouseState.CHAR_SELECTION;
                        setDot(offset);
                    }
                }
                break;

            case 2: // double-click => word selection
                mouseState = MouseState.WORD_SELECTION;
                // Disable drag which would otherwise occur when mouse would be over text
                c.setDragEnabled(false);
                // Check possible fold expansion
                try {
                    // hack, to get knowledge of possible expansion. Editor depends on Folding, so it's not really possible
                    // to have Folding depend on BaseCaret (= a cycle). If BaseCaret moves to editor.lib2, this contract
                    // can be formalized as an interface.
                    Callable<Boolean> cc = (Callable<Boolean>)c.getClientProperty("org.netbeans.api.fold.expander");
                    if (cc == null || !cc.equals(this)) {
                        if (selectWordAction == null) {
                            selectWordAction = ((BaseKit) c.getUI().getEditorKit(
                                    c)).getActionByName(BaseKit.selectWordAction);
                        }
                        if (selectWordAction != null) {
                            selectWordAction.actionPerformed(null);
                        }
                        // Select word action selects forward i.e. dot > mark
                        minSelectionStartOffset = getMark();
                        minSelectionEndOffset = getDot();
                    }
                } catch (Exception ex) {
                    Exceptions.printStackTrace(ex);
                }
                break;
                
            case 3: // triple-click => line selection
                mouseState = MouseState.LINE_SELECTION;
                // Disable drag which would otherwise occur when mouse would be over text
                c.setDragEnabled(false);
                if (selectLineAction == null) {
                    selectLineAction = ((BaseKit) c.getUI().getEditorKit(
                            c)).getActionByName(BaseKit.selectLineAction);
                }
                if (selectLineAction != null) {
                    selectLineAction.actionPerformed(null);
                    // Select word action selects forward i.e. dot > mark
                    minSelectionStartOffset = getMark();
                    minSelectionEndOffset = getDot();
                }
                break;

            default: // multi-click
        }
    }
}