Extending into title bar blocks ImGUI interaction

vvvv gamma bug
1

Hey, good evening.

I’m on 7.1-70.

When using ImGUI.Skia, if you enable Extend Into Title Bar and have some widgets there, they won’t receive mouse clicks. See the following repro video :

You can paste the following XML into an empty patch to get the same setup:

Snippet 
<?xml version="1.0" encoding="utf-16"?>
<Patch xmlns:p="property" xmlns:r="reflection" Id="LSQG16qrCcqOmkXcyg7Kpt" MergeId="5">
  <Canvas Id="SAeCh5KZOhaLd7l6o8rGO7" MergeId="4" CanvasType="Group">
    <Node Bounds="329,339,126,92" Id="SxlbrwcmMiRLcTEebyi80w">
      <p:NodeReference LastCategoryFullName="Graphics.Skia.Layer" LastDependency="VL.ImGui.Skia.vl">
        <Choice Kind="StatefulRegion" Name="Region (Stateful)" Fixed="true" />
        <Choice Kind="ProcessAppFlag" Name="ImGui" />
      </p:NodeReference>
      <Pin Id="LUZl7Nb17j0PbfEh1g1mRK" Name="Node Context" Kind="InputPin" IsHidden="true" />
      <Pin Id="DYigZOACgu5LvdDB7hVgdQ" Name="Docking Enabled" Kind="InputPin" />
      <Pin Id="VGkhE4sUlpkN7VMgVxZWoj" Name="Fonts" Kind="InputPin" />
      <Pin Id="R7l0xZ9CwwIOuYCwpU2NFg" Name="Add Fullscreen Window" Kind="InputPin" />
      <Pin Id="AT6CKYjPrSONNn9IRhrfzI" Name="Style" Kind="InputPin" />
      <Pin Id="RZFcB2OABxAPfA3yi7ezDY" Name="Use Skia Space" Kind="InputPin" />
      <Pin Id="Q8Ffgne0jLtNVedQPo8wCH" Name="Output" Kind="OutputPin" />
      <Patch Id="EObTvC9EUFUOee2Oy7foBw" ManuallySortedPins="true">
        <Patch Id="DUL5B41oDvELKhzBA0zcoh" Name="Create" ManuallySortedPins="true" />
        <Patch Id="GKLaCs4PYotLlvi2Fr3l6I" Name="Update" ManuallySortedPins="true" />
        <Patch Id="FMM2lj23Q3qQG84NnZJwUA" Name="Dispose" ManuallySortedPins="true" />
        <Node Bounds="358,371,85,19" Id="C7lq3xJ0sAPNZFS97xLhEl">
          <p:NodeReference LastCategoryFullName="ImGui.Widgets" LastDependency="VL.ImGui.vl">
            <Choice Kind="NodeFlag" Name="Node" Fixed="true" />
            <CategoryReference Kind="Category" Name="Widgets" NeedsToBeDirectParent="true" />
            <Choice Kind="ProcessNode" Name="Button" />
          </p:NodeReference>
          <Pin Id="NuefWbPjZzYLrcXLtfDFa3" Name="Context" Kind="InputPin" />
          <Pin Id="GRgs8GRCzmMP3yL1oUxenI" Name="Channel" Kind="InputPin" />
          <Pin Id="DfsCwvo44W3Mv3S0eJJDrd" Name="Label" Kind="InputPin" DefaultValue="Click me" />
          <Pin Id="MrHNftx69SZLIk8TSz863e" Name="Size" Kind="InputPin" />
          <Pin Id="PM4IYdpjKJdM8TyODKb71U" Name="Style" Kind="InputPin" />
          <Pin Id="BgXBvr8Mb0FOoCTUeRkYny" Name="Context" Kind="OutputPin" />
          <Pin Id="VQ1WYzNCvZeNJMON6muf8m" Name="Bang" Kind="OutputPin" />
        </Node>
      </Patch>
    </Node>
    <Node Bounds="329,470,145,19" Id="FeyYXaCmRS1OrHQLrUqeyg">
      <p:NodeReference LastCategoryFullName="Graphics.Skia" LastDependency="VL.Skia.vl">
        <Choice Kind="NodeFlag" Name="Node" Fixed="true" />
        <Choice Kind="ProcessAppFlag" Name="Renderer" />
      </p:NodeReference>
      <Pin Id="HIsUOXlJYyrOBAqX6sdbxI" Name="Node Context" Kind="InputPin" IsHidden="true" />
      <Pin Id="EQd3L3WpLbTPLR4of9jTQt" Name="Bounds" Kind="InputPin" DefaultValue="1454, 453, 322, 193" IsHidden="true" />
      <Pin Id="G9F9ZYfLd7yQWxXQEBGlNo" Name="Save Bounds" Kind="InputPin" IsHidden="true" />
      <Pin Id="V6gt0aP2vhQQbpgQ4gs6pK" Name="Bound to Document" Kind="InputPin" IsHidden="true" />
      <Pin Id="LBnjG5FGtCdNlxzIYW7d5H" Name="Dialog If Document Changed" Kind="InputPin" IsHidden="true" />
      <Pin Id="QIDz08Vr4vIQdEB8px8EtX" Name="Always On Top" Kind="InputPin" IsHidden="true" />
      <Pin Id="FbeMUfR9YO2LSdohCRU9Mb" Name="Extend Into Title Bar" Kind="InputPin" DefaultValue="True" IsHidden="true" />
      <Pin Id="FcTIlC0cl7PPo83mpfYoCb" Name="Input" Kind="InputPin" />
      <Pin Id="OD1dSytIdSlMe7ScFk0TlZ" Name="Title" Kind="InputPin" />
      <Pin Id="CSfZimPSYmVPLMmxakLTwl" Name="Color" Kind="InputPin" />
      <Pin Id="KDR0zGDyyosN6Dn7EMZcBR" Name="Clear" Kind="InputPin" />
      <Pin Id="BTGJ24oJzJRPc7e3gVRmjg" Name="Space" Kind="InputPin" />
      <Pin Id="CNJizd5bO6zNX1lJm1HuMO" Name="Show Cursor" Kind="InputPin" />
      <Pin Id="SYU7LaXUVElQV75RIrvqVd" Name="VSync" Kind="InputPin" />
      <Pin Id="MiVO8G2o452L2kQAWVlXvL" Name="Commands" Kind="InputPin" IsHidden="true" />
      <Pin Id="DC2STYRgvoGLDU8HEQhSEo" Name="Enable Keyboard Shortcuts" Kind="InputPin" IsHidden="true" />
      <Pin Id="TZ7jeOqbvviLV9EBJ7InFt" Name="Enabled" Kind="InputPin" />
      <Pin Id="KwibaqrHCUtQKSK8ythYRL" Name="Form Bounds Notifications" Kind="OutputPin" IsHidden="true" />
      <Pin Id="FSDHTvfpWUUPFrZfU6cFYX" Name="Form" Kind="OutputPin" />
      <Pin Id="QXLYzkzUvwfMsEwqzlKBpU" Name="ClientBounds" Kind="OutputPin" />
      <Pin Id="HPVNwRCzjcOOk3Tnu8irBH" Name="Render Time" Kind="OutputPin" />
    </Node>
  </Canvas>
  <Link Id="TNTjq0149NlP2GXyTwr9Ah" Ids="Q8Ffgne0jLtNVedQPo8wCH,FcTIlC0cl7PPo83mpfYoCb" />
  <NugetDependency Id="CGLu9CMp7knNSAoCAWUhrg" Location="VL.ImGui" Version="2025.7.1-0070-g54e23a3bf8" />
  <NugetDependency Id="NwBWXgpbUKNPeghVLnmAnl" Location="VL.ImGui.Skia" Version="2025.7.1-0070-g54e23a3bf8" />
  <NugetDependency Id="HBoEayaOAcMNarn5VO6aHF" Location="VL.Skia" Version="2025.7.1-0070-g54e23a3bf8" />
</Patch>

Thanks!

seb

2

Good point, I guess we’ll need to add a pin for that, something like reserved area which gets excluded from titlebar interaction.

3

In upcoming you’ll find an optional pin on the render windows where you can set an interaction width (in DIP) which defines the area from the top-left of the window where mouse clicks will not be handled by the title bar but instead lead to regular mouse events.

3 Likes
4

Thanks for the prompt fix @Elias !