Help tooltip in node graph

Auburn · Aug 3, 2021 · 344732d · 344732d
1 parent 66795f0
commit 344732d
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Showing 3 changed files with 35 additions and 2 deletions.
diff --git a/NoiseTool/CMakeLists.txt b/NoiseTool/CMakeLists.txt
@@ -20,7 +20,7 @@ CPMAddPackage(
         "GLFW_INSTALL OFF"
         "GLFW_BUILD_TESTS OFF"
         "GLFW_BUILD_EXAMPLES OFF"
-        "GLFW_BULID_DOCS OFF"
+        "GLFW_BUILD_DOCS OFF"
 )
 
 CPMAddPackage(

diff --git a/NoiseTool/FastNoiseNodeEditor.cpp b/NoiseTool/FastNoiseNodeEditor.cpp
@@ -323,6 +323,8 @@ void FastNoiseNodeEditor::Draw( const Matrix4& transformation, const Matrix4& pr
         ImGui::TextUnformatted( simdTxt.c_str() );
 
         imnodes::BeginNodeEditor();
+
+        DoHelp();
 
         DoContextMenu();
 
@@ -398,7 +400,11 @@ void FastNoiseNodeEditor::UpdateSelected()
     std::vector<int> linksToDelete;
     int selectedLinkCount = imnodes::NumSelectedLinks();
 
-    if( selectedLinkCount && ImGui::IsKeyPressed( ImGui::GetKeyIndex( ImGuiKey_Delete ), false ) )
+    bool delKeyPressed =
+        ImGui::IsKeyPressed( ImGui::GetKeyIndex( ImGuiKey_Delete ), false ) ||
+        ImGui::IsKeyPressed( ImGui::GetKeyIndex( ImGuiKey_Backspace ), false );
+
+    if( selectedLinkCount && delKeyPressed )
     {
         linksToDelete.resize( selectedLinkCount );
         imnodes::GetSelectedLinks( linksToDelete.data() );
@@ -713,6 +719,32 @@ bool FastNoiseNodeEditor::AddNodeFromEncodedString( const char* string, ImVec2 n
     return false;
 }
 
+void FastNoiseNodeEditor::DoHelp()
+{
+    ImGui::Text( " Help" );
+    if( ImGui::IsItemHovered() )
+    {
+        ImGui::PushStyleVar( ImGuiStyleVar_WindowPadding, ImVec2( 4.f, 4.f ) );
+        constexpr float alignPx = 110;
+
+        ImGui::BeginTooltip();
+        ImGui::Text( "Add nodes" );
+        ImGui::SameLine( alignPx );
+        ImGui::Text( "Right mouse click" );
+
+        ImGui::Text( "Pan graph" );
+        ImGui::SameLine( alignPx );
+        ImGui::Text( "Right mouse drag" );
+
+        ImGui::Text( "Delete node/link" );
+        ImGui::SameLine( alignPx );
+        ImGui::Text( "Backspace or Delete" );
+        ImGui::EndTooltip();
+
+        ImGui::PopStyleVar();
+    }
+}
+
 void FastNoiseNodeEditor::DoContextMenu()
 {
     std::string className;

diff --git a/NoiseTool/FastNoiseNodeEditor.h b/NoiseTool/FastNoiseNodeEditor.h
@@ -105,6 +105,7 @@ namespace Magnum
         FastNoise::SmartNode<> GenerateSelectedPreview();
         void ChangeSelectedNode( int newId );
         void CheckLinks();
+        void DoHelp();
         void DoContextMenu();
         void DoNodes();
         void UpdateSelected();