Java JTextComponent.repaint方法代码示例

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
/**
 * Set new caret bounds while repainting both original and new bounds.
 * Clear the caret-painted and update-caret-bounds flags.
 *
 * @param newCaretBounds non-null new bounds
 */
synchronized Rectangle setCaretBoundsWithRepaint(Rectangle newCaretBounds, JTextComponent c, String logMessage, int logIndex) {
    Rectangle oldCaretBounds = this.caretBounds;
    boolean repaintOld = (oldCaretBounds != null && (this.statusBits & CARET_PAINTED) != 0);
    this.statusBits &= ~(CARET_PAINTED | UPDATE_CARET_BOUNDS);
    boolean log = EditorCaret.LOG.isLoggable(Level.FINE);
    if (repaintOld) {
        if (log) {
            logRepaint(logMessage + "-setBoundsRepaint-repaintOld", logIndex, oldCaretBounds);
        }
        c.repaint(oldCaretBounds); // First schedule repaint of the original bounds (even if new bounds will possibly be the same)
    }
    if (!repaintOld || !newCaretBounds.equals(oldCaretBounds)) {
        if (log) {
            logRepaint(logMessage + "-setBoundsRepaint-repaintNew", logIndex, newCaretBounds);
        }
        c.repaint(newCaretBounds);
    }
    this.caretBounds = newCaretBounds;
    return oldCaretBounds;
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
/**
 * Scrolls the specified text component so the text between the starting and ending index are visible.
 */
public static void scrollToText(JTextComponent textComponent, int startingIndex, int endingIndex) {
    try {
        Rectangle startingRectangle = textComponent.modelToView(startingIndex);
        Rectangle endDingRectangle = textComponent.modelToView(endingIndex);

        Rectangle totalBounds = startingRectangle.union(endDingRectangle);

        textComponent.scrollRectToVisible(totalBounds);
        textComponent.repaint();
    } catch (BadLocationException e) {
        e.printStackTrace();
    }
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
private void updateRectangularSelectionPaintRect() {
    // Repaint current rect
    JTextComponent c = component;
    Rectangle repaintRect = rsPaintRect;
    if (rsDotRect == null || rsMarkRect == null) {
        return;
    }
    Rectangle newRect = new Rectangle();
    if (rsDotRect.x < rsMarkRect.x) { // Swap selection to left
        newRect.x = rsDotRect.x; // -1 to make the visual selection non-empty
        newRect.width = rsMarkRect.x - newRect.x;
    } else { // Extend or shrink on right
        newRect.x = rsMarkRect.x;
        newRect.width = rsDotRect.x - newRect.x;
    }
    if (rsDotRect.y < rsMarkRect.y) {
        newRect.y = rsDotRect.y;
        newRect.height = (rsMarkRect.y + rsMarkRect.height) - newRect.y;
    } else {
        newRect.y = rsMarkRect.y;
        newRect.height = (rsDotRect.y + rsDotRect.height) - newRect.y;
    }
    if (newRect.width < 2) {
        newRect.width = 2;
    }
    rsPaintRect = newRect;

    // Repaint merged region with original rect
    if (repaintRect == null) {
        repaintRect = rsPaintRect;
    } else {
        repaintRect = repaintRect.union(rsPaintRect);
    }
    c.repaint(repaintRect);
    
    updateRectangularSelectionPositionBlocks();
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
synchronized Rectangle repaint(JTextComponent c, String logMessage, int logIndex) {
    Rectangle bounds = this.caretBounds;
    if (bounds != null) {
        this.statusBits &= ~CARET_PAINTED;
        if (EditorCaret.LOG.isLoggable(Level.FINE)) {
            logRepaint(logMessage, logIndex, bounds);
        }
        c.repaint(bounds);
    }
    return bounds;
}
 

import javax.swing.text.JTextComponent; //导入方法依赖的package包/类
/**
 * Repaint caret bounds if the caret is showing or do nothing
 * @param c
 * @return 
 */
synchronized Rectangle repaintIfShowing(JTextComponent c, String logMessage, int logIndex) {
    Rectangle bounds = this.caretBounds;
    if (bounds != null) {
        boolean repaint = (this.statusBits & CARET_PAINTED) != 0;
        if (repaint) {
            this.statusBits &= ~CARET_PAINTED;
            if (EditorCaret.LOG.isLoggable(Level.FINE)) {
                logRepaint(logMessage + "-repaintIfShowing", logIndex, bounds);
            }
            c.repaint(bounds);
        }
    }
    return bounds;
}