org.cef.handler

接口 CefRenderHandler

所有已知实现类:

CefClient, CefRenderHandlerAdapter

public interface CefRenderHandler

Implement this interface to handle events when window rendering is disabled. The methods of this class will be called on the UI thread.

实现此接口以在禁用窗口呈现时处理事件。将在UI线程上调用此类的方法。

方法概要

限定符和类型	方法和说明
java.awt.Point	getScreenPoint(CefBrowser browser, java.awt.Point viewPoint) Retrieve the screen point for the specified view point. 检索指定视点的屏幕点。
java.awt.Rectangle	getViewRect(CefBrowser browser) Retrieve the view rectangle. 检索视图矩形。
void	onCursorChange(CefBrowser browser, int cursor) Handle cursor changes. 处理光标更改。
void	onPaint(CefBrowser browser, boolean popup, java.awt.Rectangle[] dirtyRects, java.nio.ByteBuffer buffer, int width, int height) Handle painting. 处理绘画。
void	onPopupShow(CefBrowser browser, boolean show) Show or hide the popup window. 显示或隐藏弹出窗口。
void	onPopupSize(CefBrowser browser, java.awt.Rectangle size) Size the popup window. 调整弹出窗口的大小。
boolean	startDragging(CefBrowser browser, CefDragData dragData, int mask, int x, int y) Called when the user starts dragging content in the web view. 当用户开始在Web视图中拖动内容时调用。
void	updateDragCursor(CefBrowser browser, int operation) Called when the web view wants to update the mouse cursor during a drag & drop operation. 在Web视图要在拖放操作期间更新鼠标光标时调用。

方法详细资料

getScreenPoint

java.awt.Point getScreenPoint(CefBrowser browser,
                              java.awt.Point viewPoint)

Retrieve the screen point for the specified view point.

检索指定视点的屏幕点。

参数:

browser - The browser generating the event. - 生成事件的浏览器。

viewPoint - The point in the view. - 视图中的要点。

返回:

The screen point. 屏幕点。

getViewRect

java.awt.Rectangle getViewRect(CefBrowser browser)

Retrieve the view rectangle.

检索视图矩形。

参数:

browser - The browser generating the event. - 生成事件的浏览器。

返回:

The view rectangle. 视图矩形。

onCursorChange

void onCursorChange(CefBrowser browser,
                    int cursor)

Handle cursor changes.

处理光标更改。

参数:

browser - The browser generating the event. - 生成事件的浏览器。

cursor - The new cursor. - 新光标。

onPaint

void onPaint(CefBrowser browser,
             boolean popup,
             java.awt.Rectangle[] dirtyRects,
             java.nio.ByteBuffer buffer,
             int width,
             int height)

Handle painting.

处理绘画。

参数:

browser - The browser generating the event. - 生成事件的浏览器。

popup - True if painting a popup window. - 如果绘制弹出窗口，则为True。

dirtyRects - Array of dirty regions. - 一系列脏区。

buffer - Pixel buffer for the whole window. - 整个窗口的像素缓冲区。

width - Width of the buffer. - 缓冲区的宽度。

height - Height of the buffer. - 缓冲区的高度。

onPopupShow

void onPopupShow(CefBrowser browser,
                 boolean show)

Show or hide the popup window.

显示或隐藏弹出窗口。

参数:

browser - The browser generating the event. - 生成事件的浏览器。

show - True if the popup window is being shown. - 如果正在显示弹出窗口，则为True。

onPopupSize

void onPopupSize(CefBrowser browser,
                 java.awt.Rectangle size)

Size the popup window.

调整弹出窗口的大小。

参数:

browser - The browser generating the event. - 生成事件的浏览器。

size - Size of the popup window. - 弹出窗口的大小。

startDragging

boolean startDragging(CefBrowser browser,
                      CefDragData dragData,
                      int mask,
                      int x,
                      int y)

Called when the user starts dragging content in the web view. Contextual information about the dragged content is supplied by dragData. OS APIs that run a system message loop may be used within the StartDragging call. Return false to abort the drag operation. Don't call any of CefBrowser-dragSource*Ended* methods after returning false. Return true to handle the drag operation. Call CefBrowser.dragSourceEndedAt and CefBrowser.ragSourceSystemDragEnded either synchronously or asynchronously to inform the web view that the drag operation has ended.

当用户开始在Web视图中拖动内容时调用。有关拖动内容的上下文信息由dragData提供。可以在StartDragging调用中使用运行系统消息循环的OS API。返回false以中止拖动操作。返回false后不要调用任何CefBrowser-dragSource * Ended *方法。返回true以处理拖动操作。同步或异步调用CefBrowser.dragSourceEndedAt和CefBrowser.ragSourceSystemDragEnded以通知Web视图拖动操作已结束。

参数:

browser - The browser generating the event. - 生成事件的浏览器。

dragData - Contextual information about the dragged content - 有关拖动内容的上下文信息

mask - Describes the allowed operation (none, move, copy, link). - 描述允许的操作（无，移动，复制，链接）。

x - Coordinate within CefBrowser - 在CefBrowser内协调

y - Coordinate within CefBrowser - 在CefBrowser内协调

返回:

false to abort the drag operation or true to handle the drag operation. false用于中止拖动操作，如果为true，则用于处理拖动操作。

updateDragCursor

void updateDragCursor(CefBrowser browser,
                      int operation)

Called when the web view wants to update the mouse cursor during a drag & drop operation.

在Web视图要在拖放操作期间更新鼠标光标时调用。

参数:

browser - The browser generating the event. - 生成事件的浏览器。

operation - Describes the allowed operation (none, move, copy, link). - 描述允许的操作（无，移动，复制，链接）。