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DropInfo.TargetModel is null in 2.3

MaxMax2

In 2.3 something went wrong. TargetModel is null in DropInfo that passed to OnDrop method of a drop handler. It makes it impossible to determine where I drop my object. I should perform drop on MapView only. In 2.2 TargetModel contained that MapView when I dragging an object over it.

Is it a bug or there is API to specify where it is valid to drop an object?

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Accepted answers

UmaHarano

Hi Max

If you drop into a pane in Pro that holds a MapView, it will be an IMapPane. From this, you can get the MapView.

This works even if you drop into a Pane that is not the active one (gray on the tab name).

Thanks

Uma

All comments

UmaHarano

Hi Max

If you drop into a pane in Pro that holds a MapView, it will be an IMapPane. From this, you can get the MapView.

This works even if you drop into a Pane that is not the active one (gray on the tab name).

Thanks

Uma

MaxMax2

Hi Uma,

FrameworkApplication.Panes.ActivePane is the same thing as drop target? I think no. At now I use VisualTarget to determine where I'm dropping my object:

        <SPAN class="keyword token">private</SPAN> <SPAN class="keyword token">static</SPAN> <SPAN class="keyword token">bool</SPAN> <SPAN class="token function">IsOverMapView</SPAN><SPAN class="punctuation token">(</SPAN>DropInfo dropInfo<SPAN class="punctuation token">)</SPAN>
        <SPAN class="punctuation token">{</SPAN>
            <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>dropInfo <SPAN class="operator token">==</SPAN> <SPAN class="keyword token">null</SPAN><SPAN class="punctuation token">)</SPAN>
                <SPAN class="keyword token">return</SPAN> <SPAN class="keyword token">false</SPAN><SPAN class="punctuation token">;</SPAN>

            <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>dropInfo<SPAN class="punctuation token">.</SPAN>TargetModel <SPAN class="keyword token">is</SPAN> MapView<SPAN class="punctuation token">)</SPAN>
                <SPAN class="keyword token">return</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN>

            <SPAN class="keyword token">var</SPAN> visualTarget <SPAN class="operator token">=</SPAN> dropInfo<SPAN class="punctuation token">.</SPAN>VisualTarget<SPAN class="punctuation token">;</SPAN>
            <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>visualTarget <SPAN class="operator token">==</SPAN> <SPAN class="keyword token">null</SPAN><SPAN class="punctuation token">)</SPAN>
                <SPAN class="keyword token">return</SPAN> <SPAN class="keyword token">false</SPAN><SPAN class="punctuation token">;</SPAN>

            <SPAN class="comment token">// TODO: seems there is a bug in ArcGIS Pro SDK 2.3 with TargetModel is null, so this is a workaround</SPAN>
            <SPAN class="keyword token">return</SPAN> visualTarget<SPAN class="punctuation token">.</SPAN><SPAN class="token function">GetType</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>Name <SPAN class="operator token">==</SPAN> <SPAN class="string token">"MapPaneView"</SPAN><SPAN class="punctuation token">;</SPAN>
        <SPAN class="punctuation token">}</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

UmaHarano

Hi Max,

There was an issue with the sequence of how custom drop handlers were being evaluated in Pro 2.2 on drag drop and that was fixed in 2.3. Because custom handlers are now evaluated first, the TargetModel property cannot always be guaranteed to be populated. Instead, please use this code snippet below: We will be updating the relevant samples for 2.4.

<SPAN class="keyword token">public</SPAN> <SPAN class="keyword token">override</SPAN> <SPAN class="keyword token">void</SPAN> <SPAN class="token function">OnDrop</SPAN><SPAN class="punctuation token">(</SPAN>DropInfo dropInfo<SPAN class="punctuation token">)</SPAN>
        <SPAN class="punctuation token">{</SPAN>

            <SPAN class="token preprocessor">#region Implement Your OnDrop Here</SPAN>
            <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>FrameworkApplication<SPAN class="punctuation token">.</SPAN>Panes<SPAN class="punctuation token">.</SPAN>ActivePane <SPAN class="keyword token">is</SPAN> IMapPane<SPAN class="punctuation token">)</SPAN>
            <SPAN class="punctuation token">{</SPAN>
                <SPAN class="comment token">//a drag is being made on the active map</SPAN>
                <SPAN class="keyword token">var</SPAN> view <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>IMapPane<SPAN class="punctuation token">)</SPAN>FrameworkApplication<SPAN class="punctuation token">.</SPAN>Panes<SPAN class="punctuation token">.</SPAN>ActivePane<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>MapView<SPAN class="punctuation token">;</SPAN>
                <SPAN class="comment token">// globe or local</SPAN>
                <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>view<SPAN class="punctuation token">.</SPAN>ViewingMode <SPAN class="operator token">==</SPAN> MapViewingMode<SPAN class="punctuation token">.</SPAN>SceneGlobal <SPAN class="operator token">||</SPAN>
                  view<SPAN class="punctuation token">.</SPAN>ViewingMode <SPAN class="operator token">==</SPAN> MapViewingMode<SPAN class="punctuation token">.</SPAN>SceneLocal<SPAN class="punctuation token">)</SPAN>
                <SPAN class="punctuation token">{</SPAN>
                    <SPAN class="comment token">//we are in 3D</SPAN>
                    <SPAN class="token function">OnDrop3D</SPAN><SPAN class="punctuation token">(</SPAN>dropInfo<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
                <SPAN class="punctuation token">}</SPAN>
                <SPAN class="keyword token">else</SPAN>
                <SPAN class="punctuation token">{</SPAN>
                    <SPAN class="comment token">//we are in 2D</SPAN>
                    <SPAN class="token function">OnDrop2D</SPAN><SPAN class="punctuation token">(</SPAN>dropInfo<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
                <SPAN class="punctuation token">}</SPAN>
            <SPAN class="punctuation token">}</SPAN>
            <SPAN class="token preprocessor">#endregion</SPAN>

            dropInfo<SPAN class="punctuation token">.</SPAN>Handled <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN>
        <SPAN class="punctuation token">}</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Thanks

Uma

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