Flex :: Drag And Drop - Prevent Dragging For Certain Items?
Mar 22, 2010
how would you prevent dragging for some items of your List or DataGrid?
Let's say I had a list with two items: 'Tom' and 'Jerry'. Only 'Tom' should be dragable, not 'Jerry'.
Ideally I had a 'isDragEnabled(item:Object):Boolean' function, which is being queried by the drag source.
My difficulties start with the fact that the 'dragStart' event handler has a null value for the dragSource, so right from the start I find it hard to find out what the drag-start is about..
PS There have been a few discussions on preventing or canceling a drop, but I haven't seen much about preventing the drag start, hence this question.
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Similar Posts:
Oct 19, 2009
I was wondering, if I have two list boxes, and I want to drag and drop between both of them, how do I prevent the user from dragging onto the same list (thus duplicating the item? I cannot have a situation where that is the case
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Feb 23, 2012
I have an AdvancedDataGrid with editable parameter to "true". My problem is that after a successfull drag & drop, the item is being edited and I don't want this to happen. I tried to create a custom advancedDataGrid with this:
[Code]...
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Dec 2, 2009
How to get all the selected items from in this below code selectedContsList ?
<mx:DataGrid id="dg" dataProvider="{cNumbersList}" allowMultipleSelection="true" dropEnabled="true" dragMoveEnabled="true" >
<mx:columns>
[code].....
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Jun 27, 2011
I just started using Flash Builder 4 (yesterday infact).
I have two lists and a canvas. When dropping a list item onto the canvas, i want to trace what item it is (the label and data) and which list it came from. From there, i want to add an image to the canvas according to the dropped item.
Here's my current code
private function componentDragEnterHandler(event:DragEvent):void {
DragManager.acceptDragDrop(Canvas(event.currentTarget));
DragManager.showFeedback( DragManager.COPY );
}
[Code].....
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Jun 10, 2009
Why is it that, when I enable dragging-and-dropping in a TitleGrid, items are copied when they are dragged instead of moved?[code]When either of those items is clicked-and-dragged, it will get copied instead of moved.This is especially confusing because TileList is a decedent of ListBase, which DataGrid also descends from..But DataGrid does the right thing when dragging and dropping items.
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Sep 26, 2009
Is it possible to handle keystrokes WHILE dragging? I found this to be impossible, because hitting a key always fires an "onRelease" or "onReleaseOutside" event on the dragged movieclip when releasing the key - intterupting the drag operation. What I want to do is something like this: Drag and Drop a Movieclip and while dragging it I want to be able to flip it with a keystroke.
[Code]...
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Apr 25, 2005
I have several drag and drop interactions in which they get points if they drag it to the correct position. The problem is they can move it out and back again to keep adding points to their score. I need to put some code in the correct portion of the drag and drop code that will make the word stay where it is when it's correct instead of letting them drag it again.
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Apr 25, 2005
I have several drag and drop interactions in which they get points if they drag it to the correct position. The problem is they can move it out and back again to keep adding points to their score. I need to put some code in the correct portion of the drag and drop code that will make the word stay where it is when it's correct instead of letting them drag it again.
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Sep 6, 2009
I have run into a drag and drop issue .I have an item that I would like to drag and drop. Seems simple enough, but I also want to make it that if the user drags the image off the screen, that it stops dragging and returns the image to the center of the screen. What happens now is that it continues dragging and sticks to the cursor if you release outside of the viewable area. The original piece has a lot of other things going on, so I ve created a simple piece with the AS in the timeline that shows only this particular issue.
Code:
var mrT:MC_mrT = new MC_mrT;
addChild(mrT);
mrT.x = stage.stageWidth*.5;[code].............
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Oct 29, 2010
i'm new to flash AS3. I am trying to create an drag drop activity where the user can match words and meanings by dropping and dragging into the right space. At the moment I want to create multiple drop areas for the boxes. At the moment they will only fall within their own target area - also only the boxes move and not the text. How do i create mutiple drop areas for the words and meanings?
[Code]....
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May 17, 2009
It is possible to drag & drop items between different flash objects?
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Jul 15, 2010
I'm trying to create an interactive game where multiple movieclips can be dragged onto a single target. I understand that the target and the movie clip have to have the same name, like "book_mc" has to have a target of "targetbook_mc", but is there another way to do this so that "book_mc" and "pencil_mc" can both have the same target?
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Mar 31, 2012
I have made a flash application and in this flash application I have included a jigsaw puzzle. The application is wrote on one timeline and certain frames are used as different pages within the application.
The problem is once the jigsaw drag and drop are moved the pieces are displayed on all frames instead of just the one jigsaw puzzle frame I created.
How can I make these drag and drop items not be shown on the other frames?[code]...
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Jan 19, 2010
What would be a good way to create a grid of images in which one can be dragged to a new position and the other images will shift to make room for the image dragged? Looking at making a little program that will reorder an XML file by visually dragging the items to where I want them.
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Mar 1, 2011
Basically they drag letters into a box to spell words.I have managed to get the letters to drag to the box but I would like the child to be able to reset all of the letters to their original positions.
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May 11, 2009
Sounds strange, but let me explain. What the user sees: Loading the page, color swatches fade in and slide over into place, row by row. Once in place, user can drag and drop swatches around, place side-by-side, etc. The script necessary to attach to a button so that all swatches can be reset back into place where they were, and not generate a replay of the initial movie clip from the beginning. (a goto and play is not what I'm looking for) Here's my code so far:
[Code]....
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Nov 22, 2010
I have a canvas onto which I draw shapes like rectangle etc. When I move the shape using my custom mouse down/mouse move handler, the shape can go outside the parent bounds.
I am checking if the child is outside the parent's bound to snap it back:
var bounds:Rectangle = this.getBounds(this.parent);
var p:Point;
if (bounds.x <0) {
[Code]...
The snapInside method gets called when I go outside the left or top boundary. But when the child is dragged outside the right or bottom boundary, I find Flex/Flash runtime automatically expands the parent's height and width. So say the parent size was initially 800x600, if child Y bounds exceed 800 by say 20 pixel, I find the this.parent.height automatically resized by flex to 820!!
How do I prevent the parent from resizing when child goes outside the original bounds of the parent ?
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Feb 21, 2004
I basically want to be able to drag any item out of that list, and when doing so, have it that item automatically go to the bottom, and have the remaining items scroll up. I can handle the drag and drop part of it, but I'm confused on how I could get the remaining column of items to dynamically move up depending on which item is taken out. I'm thinking mayble along the lines of an array?
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Feb 23, 2010
I'd love to be able to prevent dragging of a HDividedBox's divider based on a condition. for example:
[Code]...
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Jan 14, 2010
I have a flex tree with dragMoveEnabled = true. I want to find out, when an item is dragged into itself or it's children. I'd like to use DragManager.showFeedback(DragManager.NONE) in the tree's onDragOver handler, but can't find out how get this to work. I'm using an ArrayCollection of nested objects as dataSource for the tree.
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Mar 3, 2011
How can I constrain an image in a container to only a horizontal drag that when it collides with another image 'pushes' that image along that same horizontal line.
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Oct 11, 2010
How do I prevent a user from dropping an item outsider a folder? My dataProvider is only 1-level deep.It seems that with a DragEvent handler or DragDrop handler I can find the data of the item I'm dragging, but not where I'm dropping ( so I can prevent it ).
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Dec 21, 2011
When you drag the edge of container with mouse ,how to implement changing the size of container?
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Nov 20, 2011
So there's been a new "feature" in the flash player since version 10.1, which reduces the player's framerate to 2 fps when the application window is out of view. This is good news for performance, but it can break some functionality, such as the Timer class.
I have an application which uses a Timer to display a countdown. Given the nature of the application, it is required for the Timer to complete its countdown even if the user is not there to see it. Imagine that you need to give the user only 10 seconds to perform a task. If the user minimizes the window halfway through the counter, they can take as much time as they want and still have 5 seconds left when they return to the window. This apparently can not be avoided with the newer flash players.
In Air applications there is the backgroundFrameRate property which can be set to prevent this behavior, but this is part of the WindowedApplication class, so it seems that it is not available in a web application. Does anyone know a way to keep a constant frame rate even when the window is not visible?
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Mar 29, 2011
I'm making a Matching Game where I have some images on my left and I can drag them onto images on my right and if they are matching, they should both disappear from the stage.
[Code]....
findMatch() is a function that finds in my XML file the path of the file that matches the file that is being dragged. Having that path, I send it to dragEnterHandler where it compares it with the path of the dropTarget file and if they are the same, it accepts it. Then in dragDropHandler, I'm changing the source path of my second image to "", so that it disappears from the stage. How can I access the first file (the one that was being dragged), so that I can change its path to "", to get rid of it?
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May 31, 2011
I wish while i am draging and moving arround TitleWindow instance and a specific event occure to simulate drop of the window, and not further moving been possible for a few seconds.It is very unusual question but it will be more than handy each point to a solutionP.S: The whole idea is as follow : When i am draging a TitleWindo instace with the mouse, and if the TitleWindow hit the border of it's parent container then to drop the TitleWindow, and not further moving is possible (simulating release mouse button). If i wish to move it again, then i should click the TitleWindow title again and grag it.
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Oct 25, 2010
i have two tree one tree lets say TreeDrag is drag enabled and other is drop enabled lets say TreeDrop.. when i drag item from TreeDrag to TreeDrop,, i want to show feedback and everything else normal except the addition of dragged item in TreeDrop..
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May 19, 2009
I am trying to do a flex drag and drop. It is very similar to this first example.url....The problem is that event.currentTarget.mouseX,mouseY is showing the position where I put the mouse down rather than the position where I had finished dragging.
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May 5, 2010
we want to drag a button with a css layout from one grid to the other. On the second grid should be the same button with this layout. The grids are in different mxml files.
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