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package org.eclipse.swt.widgets;
/*
* Copyright (c) 2000, 2002 IBM Corp. All rights reserved.
* This file is made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*/
import org.eclipse.swt.internal.carbon.OS;
import org.eclipse.swt.internal.carbon.RGBColor;
import org.eclipse.swt.internal.carbon.Rect;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
public class Caret extends Widget {
Canvas parent;
int x, y, width, height;
boolean isVisible, isShowing;
int blinkRate;
Image image;
public Caret (Canvas parent, int style) {
super (parent, style);
this.parent = parent;
createWidget ();
}
boolean blinkCaret () {
if (!isVisible) return true;
if (!isShowing) return showCaret ();
if (blinkRate == 0) return true;
return hideCaret ();
}
void createWidget () {
super.createWidget ();
Display display = parent.getDisplay ();
blinkRate = display.getCaretBlinkTime ();
isVisible = true;
if (parent.getCaret () == null) {
parent.setCaret (this);
}
}
boolean drawCaret () {
if (parent == null) return false;
if (parent.isDisposed ()) return false;
int nWidth = width, nHeight = height;
if (image != null) {
Rectangle rect = image.getBounds ();
nWidth = rect.width;
nHeight = rect.height;
}
if (nWidth <= 0) nWidth = 2;
int parentHandle = parent.handle;
int window = OS.GetControlOwner (parentHandle);
int port = OS.GetWindowPort (window);
int [] currentPort = new int [1];
OS.GetPort (currentPort);
OS.SetPort (port);
int oldClip = OS.NewRgn ();
int visibleRgn = getVisibleRegion (parentHandle);
OS.GetClip (oldClip);
OS.SetClip (visibleRgn);
Rect rect = new Rect ();
OS.GetControlBounds (parentHandle, rect);
int left = rect.left + x;
int top = rect.top + y;
OS.SetRect(rect, (short) left, (short) top, (short) (left + nWidth), (short) (top + nHeight));
RGBColor color = new RGBColor ();
color.red = (short) 0xFFFF;
color.green = (short) 0xFFFF;
color.blue = (short) 0xFFFF;
OS.RGBBackColor (color);
OS.InvertRect (rect);
OS.SetClip (oldClip);
OS.DisposeRgn (visibleRgn);
OS.DisposeRgn (oldClip);
OS.SetPort (currentPort [0]);
return true;
}
public Rectangle getBounds () {
checkWidget();
if (image != null) {
Rectangle rect = image.getBounds ();
return new Rectangle (x, y, rect.width, rect.height);
}
return new Rectangle (x, y, width, height);
}
public Display getDisplay () {
Composite parent = this.parent;
if (parent == null) error (SWT.ERROR_WIDGET_DISPOSED);
return parent.getDisplay ();
}
public Font getFont () {
checkWidget();
return parent.getFont ();
}
public Image getImage () {
checkWidget();
return image;
}
public Point getLocation () {
checkWidget();
return new Point (x, y);
}
public Canvas getParent () {
checkWidget();
return parent;
}
public Point getSize () {
checkWidget();
if (image != null) {
Rectangle rect = image.getBounds ();
return new Point (rect.width, rect.height);
}
return new Point (width, height);
}
public boolean getVisible () {
checkWidget();
return isVisible;
}
boolean hideCaret () {
if (!isShowing) return true;
isShowing = false;
return drawCaret ();
}
public boolean isVisible () {
checkWidget();
return isVisible && parent.isVisible () && parent.hasFocus ();
}
boolean isFocusCaret () {
Display display = getDisplay ();
return this == display.currentCaret;
}
void killFocus () {
Display display = getDisplay ();
if (display.currentCaret != this) return;
display.setCurrentCaret (null);
if (isVisible) hideCaret ();
}
void releaseChild () {
super.releaseChild ();
if (this == parent.getCaret ()) parent.setCaret (null);
}
void releaseWidget () {
super.releaseWidget ();
Display display = getDisplay ();
if (display.currentCaret == this) {
hideCaret ();
display.setCurrentCaret (null);
}
parent = null;
image = null;
}
public void setBounds (int x, int y, int width, int height) {
checkWidget();
if (this.x == x && this.y == y && this.width == width && this.height == height) return;
boolean isFocus = isFocusCaret ();
if (isFocus) hideCaret ();
this.x = x; this.y = y;
this.width = width; this.height = height;
// parent.updateCaret ();
if (isFocus) showCaret ();
}
public void setBounds (Rectangle rect) {
checkWidget();
if (rect == null) error (SWT.ERROR_NULL_ARGUMENT);
setBounds (rect.x, rect.y, rect.width, rect.height);
}
void setFocus () {
Display display = getDisplay ();
if (display.currentCaret == this) return;
display.setCurrentCaret (this);
if (isVisible) showCaret ();
}
public void setFont (Font font) {
checkWidget();
if (font != null && font.isDisposed ()) {
error (SWT.ERROR_INVALID_ARGUMENT);
}
}
public void setImage (Image image) {
checkWidget();
if (image != null && image.isDisposed ()) {
error (SWT.ERROR_INVALID_ARGUMENT);
}
boolean isFocus = isFocusCaret ();
if (isFocus) hideCaret ();
this.image = image;
if (isFocus) showCaret ();
}
public void setLocation (int x, int y) {
checkWidget();
setBounds (x, y, width, height);
}
public void setLocation (Point location) {
checkWidget();
if (location == null) error (SWT.ERROR_NULL_ARGUMENT);
setLocation (location.x, location.y);
}
public void setSize (int width, int height) {
checkWidget();
setBounds (x, y, width, height);
}
public void setSize (Point size) {
checkWidget();
if (size == null) error (SWT.ERROR_NULL_ARGUMENT);
setSize (size.x, size.y);
}
public void setVisible (boolean visible) {
checkWidget();
if (visible == isVisible) return;
isVisible = visible;
if (!isFocusCaret ()) return;
if (isVisible) {
showCaret ();
} else {
hideCaret ();
}
}
boolean showCaret () {
if (isShowing) return true;
isShowing = true;
return drawCaret ();
}
}
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