Question

亲爱的，我和NSOutline View一起战斗，从最近的2-3天开始在桌子内执行拖放操作，但无法得到我做错的事情，这就是我到目前为止所做的，

要求， 1 - 我希望在我的视图中有透明或带有一些背景图像的NSoutlineview，要做到这一点，我需要覆盖NSOutlineView的drawRect方法，这就是我所做的

头文件中的

@interface MyCustomOutlineView:NSOutlineView{
NSImage *pBackgroundImage;

}

- setBackgroundImage:(NSImage *)pImage;

在源文件中，我只是覆盖drawRect和其他一些东西来绘制背景图像或使其透明，这样工作正常，

现在在我看来，我已经宣布了NSOutlineView对象，

/ * *我的自定义视图将具有绘制渐变和其他效果的能力 * /

@interface OutlineParentView:MyCustomView<NSOutlineDataSource>{
   MyCustomOutlineView *pOutlineView;
}

@property(nonatomic,retain)MyCustomOutlineView *pOutlineView;

在源文件中，实现以下方法，将从initWIthFrame

调用此方法

#define OutlineViewPrivateDataType "MyOutlinePrivateData"
-(void)InitOutlineView{
    NSRect          scrollFrame = [self bounds];
    NSScrollView*   scrollView  = [[[NSScrollView alloc] initWithFrame:scrollFrame] autorelease];
    [scrollView setBorderType:NSNoBorder];
    [scrollView setHasVerticalScroller:YES];
    [scrollView setHasHorizontalScroller:NO];
    [scrollView setAutohidesScrollers:YES];
    [scrollView setDrawsBackground: NO];
    NSRect          clipViewBounds  = [[scrollView contentView] bounds];
    pOutlineView       = [[[CommUICustomOutlineView alloc] initWithFrame:clipViewBounds] autorelease];
    NSTableColumn*  firstColumn     = [[[NSTableColumn alloc] initWithIdentifier:@"firstColumn"] autorelease];
    ImageTextCell *pCell = [[ImageTextCell alloc]init];
    [firstColumn setDataCell:pCell];
    [pCell setDataDelegate:self];
    [firstColumn setWidth:25];
    [pOutlineView  addTableColumn:firstColumn];
    [pOutlineView setRowHeight:30];
    [pOutlineView setDataSource:self];

    /* setData delegate implemented in the MyOutlineView to handle some of event in this  
       interface if i don't write this, then i can't handle the menu event on the 
       Outlineview  
     */
    [pOutlineView setDataDelegate:self];

    **/* On this line i am getting one warning, saying OutlineParentView doesn't implement    
       NSOutlineView delegate protocol */**
    [pOutlineView setDelegate:self];
    [scrollView setDocumentView:pOutlineView];
    /* I don't want group row to be highlighted */
    [pOutlineView setSelectionHighlightStyle:NSTableViewSelectionHighlightStyleSourceList];
    [pOutlineView registerForDraggedTypes:
         [NSArray arrayWithObjects:OutlineViewPrivateDataType,nil]];

    [pOutlineView setDraggingSourceOperationMask:NSDragOperationEvery forLocal:YES];
    [scrollView setAutoresizingMask:NSViewWidthSizable|NSViewHeightSizable];
        [self addSubview:scrollView];
    [self setAutoresizesSubviews:YES];
    [self log:@"Outline view created "];

}

与Drag-n-Drop相关的其他重要方法如下所示

- (BOOL)outlineView:(NSOutlineView *)outlineView writeItems:(NSArray *)items toPasteb oard:(NSPasteboard *)pboard{
    [self log:@"write Items"];
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:items];
    [pboard declareTypes:[NSArray arrayWithObject:OutlineViewPrivateDataType] 
    owner:self];
    [pboard setData:data forType:OutlineViewPrivateDataType];
    return YES;
}

    - (NSDragOperation)outlineView:(NSOutlineView *)outlineView validateDrop:(id < NSDraggingInfo >)info proposedItem:(id)item proposedChildIndex:(NSInteger)index
    {
        NSLog(@"validate Drop");
        return NSDragOperationEvery;
    }
    - (BOOL)outlineView:(NSOutlineView *)outlineView acceptDrop:(id < NSDraggingInfo >)info item:(id)item childIndex:(NSInteger)index{
        [self log:@"inside accept drop for NSView "];
        return YES;
    }

我检查了苹果DragnDrop示例代码，但无法得到我做错了什么，

我认为，有些问题

[pOutlineView setDelegate：self]

功能，但如何解决，我不知道，我最近从MyTableView升级到MyOutlineView，最近我能够在Custom Table视图上执行Drag-nDrop，剩下的东西工作得很好，比如DataSource等......

先谢谢亲切的问候罗汉

Answer 1

我正在设置ColumnWidth，因此拖放工作的宽度已设置，而不是在整行上我的错误:(

 [firstColumn setWidth:25];

删除此行正常

但是面对其他问题的家伙们 Regarding NSoutlineView and WriteItem | Drag-and-Drop Problem

NSOutlineView拖放问题

1 个答案: