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121 lines
4.4 KiB
C
121 lines
4.4 KiB
C
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/* -*- mode: ObjC -*-
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<title>XGDragView</title>
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<abstract>View that is dragged during drag and drop</abstract>
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Written By: <author name="Wim Oudshoorn"><email>woudshoo@xs4all.nl</email></author>
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Date: Nov 2001
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This file is part of the GNU Objective C User Interface library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
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*/
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#include <AppKit/NSCell.h>
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#include <AppKit/NSEvent.h>
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#include <Foundation/NSGeometry.h>
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#include "x11/xdnd.h"
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#include "x11/XGServerWindow.h"
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/*"
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Drag and drop support functions
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"*/
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void GSEnsureDndIsInitialized (void);
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DndClass xdnd (void);
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Atom GSActionForDragOperation(unsigned int op);
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NSDragOperation GSDragOperationForAction(Atom xaction);
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/*
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used in the operation mask to indicate that the
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user can not change the drag action by
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pressing modifiers.
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*/
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#define NSDragOperationIgnoresModifiers 0xffff
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/*"
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WRO (notes made 18 Nov 2001)
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The object that is dragged over the screen.
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It hijacks the event loop and manages the complete
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drag and drop sequence.
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"*/
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@interface XGDragView : NSView <NSDraggingInfo>
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{
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NSCell *dragCell; /*" the graphics that is dragged"*/
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NSPasteboard *dragPasteboard;
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NSPoint dragPoint; /*" in base coordinates, only valid when dragWindow != nil "*/
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gswindow_device_t *dragWindev;
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/* information used in the drag and drop event loop */
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NSPoint offset; /*" offset of image w.r.t. cursor "*/
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NSPoint dragPosition; /*" in screen coordinates "*/
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NSPoint newPosition; /*" position, not yet processed "*/
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int wx, wy; /*" position of image in X-coordinates "*/
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Window targetWindow; /*" XWindow that is the current drag target "*/
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int dragSequence;
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id dragSource;
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unsigned int dragMask; /*" Operations supported by the source "*/
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unsigned int operationMask; /*" user specified operation mask (key modifiers).
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this is either a mask of type _NSDragOperation,
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or NSDragOperationIgnoresModifiers, which
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is defined as 0xffff "*/
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unsigned int targetMask; /*" Operations supported by the target, only valid if
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targetIsDndAware is true "*/
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id dragWindow; /*" NSWindow in this application that is the current target "*/
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Atom *typelist;
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BOOL dragExternal; /*" YES if target and source are in a different application "*/
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BOOL isDragging; /*" Yes if we are currently dragging "*/
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BOOL slideBack; /*" slide back when drag fails? "*/
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NSMutableDictionary *cursors;
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}
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+ (XGDragView*) sharedDragView;
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- (BOOL) isDragging;
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- (void) setupDragInfoFromXEvent: (XEvent *)xEvent;
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- (void) updateDragInfoFromEvent: (NSEvent *)event;
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- (void) resetDragInfo;
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- (void) _sendLocalEvent: (GSAppKitSubtype)subtype
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action: (NSDragOperation)action
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position: (NSPoint)eventLocation
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timestamp: (NSTimeInterval)time
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toWindow: (NSWindow*)dWindow;
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- (void) dragImage: (NSImage*)anImage
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at: (NSPoint)screenLocation
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offset: (NSSize)initialOffset
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event: (NSEvent*)event
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pasteboard: (NSPasteboard*)pboard
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source: (id)sourceObject
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slideBack: (BOOL)slideFlag;
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- (void) postDragEvent: (NSEvent *)theEvent;
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- (void) _setCursor;
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- (void) _handleDrag: (NSEvent*)theEvent;
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- (void) _handleEventDuringDragging: (NSEvent*) theEvent;
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- (void) _updateAndMoveImageToCorrectPosition;
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- (void) _moveDraggedImageToNewPosition;
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- (void) _slideDraggedImageTo: (NSPoint)screenPoint
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numberOfSteps: (int) steps
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waitAfterSlide: (BOOL) waitFlag;
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- (Window) _xWindowAcceptingDnDunderX: (int) x Y: (int) y;
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@end
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