fixed automatic positioning tool windows

source/MRViewer/ImGuiHelpers.cpp

@@ -25,6 +25,7 @@
 #include "MRMesh/MRObjectMesh.h"
 #include "MRPch/MRSpdlog.h"
 #include "MRRibbonFontHolder.h"
+#include "MRImGuiMultiViewport.h"
 #include <imgui_internal.h>
 
 namespace ImGui
@@ -562,15 +563,16 @@ std::pair<ImVec2, bool> LoadSavedWindowPos( const char* label, ImGuiWindow* wind
     if ( !window || windowIsInactive )
     {
         auto ribMenu = std::dynamic_pointer_cast< MR::RibbonMenu >( menu );
-        float xPos = GetIO().DisplaySize.x - width;
-        float yPos = 0.0f;
+        const auto shiftMV = ImGuiMV::GetMainViewportShift();
+        float xPos = GetIO().DisplaySize.x - width + shiftMV.x;
+        float yPos = shiftMV.y;
         if ( position )
         {
             xPos = position->x;
             yPos = position->y;
         }
         else if ( ribMenu )
-            yPos = ( ribMenu->getTopPanelOpenedHeight() - 1.0f ) * UI::scale();
+            yPos += ( ribMenu->getTopPanelOpenedHeight() - 1.0f ) * UI::scale();
 
         auto& config = MR::Config::instance();
         if ( menu->isSavedDialogPositionsEnabled() && config.hasJsonValue( "DialogPositions" ) )
@@ -670,6 +672,8 @@ bool BeginCustomStatePlugin( const char* label, bool* open, const CustomStatePlu
                 }
             }
         }
+        else
+            maxHeight = FLT_MAX;
 
         SetNextWindowSizeConstraints( ImVec2( params.width, minHeight ), ImVec2( params.width, maxHeight ) );
     }

source/MRViewer/MRUIRectAllocator.cpp

@@ -3,6 +3,7 @@
 #include "MRViewer/MRViewer.h"
 #include "MRViewer/MRViewport.h"
 #include "MRViewer/MRImGuiVectorOperators.h"
+#include "MRViewer/MRImGuiMultiViewport.h"
 
 #include <imgui_internal.h>
 
@@ -159,16 +160,20 @@ void WindowRectAllocator::setFreeNextWindowPos( const char* expectedWindowName,
     {
         // push into application window if it is out
         const Vector2f appWindowSize = Vector2f( getViewerInstance().framebufferSize );
+        const Box2f appWindowBox = Box2f::fromMinAndSize( ImGuiMV::GetMainViewportShift(), appWindowSize );
         auto windowBox = Box2f::fromMinAndSize( defaultPos, window->Size );
-        defaultPos.x = std::clamp( windowBox.min.x, 0.0f, std::max( 0.0f, windowBox.min.x - ( windowBox.max.x - appWindowSize.x ) ) );
-        defaultPos.y = std::clamp( windowBox.min.y, 0.0f, std::max( 0.0f, windowBox.min.y - ( windowBox.max.y - appWindowSize.y ) ) );
+        defaultPos.x = std::clamp( windowBox.min.x, appWindowBox.min.x, std::max( 0.0f, windowBox.min.x + appWindowBox.min.x - ( windowBox.max.x - appWindowBox.max.x ) ) );
+        defaultPos.y = std::clamp( windowBox.min.y, appWindowBox.min.y, std::max( 0.0f, windowBox.min.y + appWindowBox.min.y - ( windowBox.max.y - appWindowBox.max.y ) ) );
         windowBox = Box2f::fromMinAndSize( defaultPos, window->Size );
 
-
+        // convert viewport bounds from local to window space
         Box2f viewportBounds = getViewerInstance().getViewportsBounds();
         Box2f boundsFixed = viewportBounds;
         boundsFixed.min.y = ImGui::GetIO().DisplaySize.y - boundsFixed.max.y;
         boundsFixed.max.y = boundsFixed.min.y + viewportBounds.size().y;
+        // convert viewport bounds from window to screen space
+        boundsFixed.min = ImGuiMV::Window2ScreenSpaceVector2f( boundsFixed.min );
+        boundsFixed.max = ImGuiMV::Window2ScreenSpaceVector2f( boundsFixed.max );
 
         auto result = findFreeRect( windowBox, boundsFixed, [&]( Box2f rect, std::function<void( const char*, Box2f )> func )
         {

source/MRViewer/MRViewerSettingsPlugin.cpp

@@ -31,6 +31,7 @@
 #include "MRMesh/MRConfig.h"
 #include "MRPch/MRSpdlog.h"
 #include "MRViewportGlobalBasis.h"
+#include "MRImGuiMultiViewport.h"
 #include "MRShortcutManager.h"
 
 namespace
@@ -78,7 +79,7 @@ void ViewerSettingsPlugin::drawDialog( ImGuiContext* )
 {
     auto menuWidth = 400.0f * UI::scale();
 
-    ImVec2 position{ ( viewer->framebufferSize.x - menuWidth ) / 2, viewer->framebufferSize.y / 6.0f };
+    ImVec2 position = ImGuiMV::Window2ScreenSpaceImVec2( ImVec2( ( viewer->framebufferSize.x - menuWidth ) / 2, viewer->framebufferSize.y / 6.0f ) );
     if ( !ImGuiBeginWindow_( { .width = menuWidth, .position = &position } ) )
         return;