Tooltips: made using SetItemTooltip()/IsItemHovered(ImGuiHoveredFlags_ForTooltip) defaults to activate tooltips on disabled items.. (#1485)

docs/CHANGELOG.txt

@@ -53,6 +53,9 @@ Breaking changes:
 
 Other changes:
 
+- Tooltips: made using SetItemTooltip()/IsItemHovered(ImGuiHoveredFlags_ForTooltip) defaults to
+  activate tooltips on disabled items. This is done by adding ImGuiHoveredFlags_AllowWhenDisabled
+  to the default value of style.HoverFlagsForTooltipMouse/HoverFlagsForTooltipNav. (##1485)
 - Nav: Tabbing always enable nav highlight when ImGuiConfigFlags_NavEnableKeyboard is set.
   Previously was inconsistent and only enabled when stepping through a non-input item.
   (#6802, #3092, #5759, #787)

imgui.cpp

@@ -1200,8 +1200,8 @@ ImGuiStyle::ImGuiStyle()
     HoverStationaryDelay    = 0.15f;            // Delay for IsItemHovered(ImGuiHoveredFlags_Stationary). Time required to consider mouse stationary.
     HoverDelayShort         = 0.15f;            // Delay for IsItemHovered(ImGuiHoveredFlags_DelayShort). Usually used along with HoverStationaryDelay.
     HoverDelayNormal        = 0.40f;            // Delay for IsItemHovered(ImGuiHoveredFlags_DelayNormal). "
-    HoverFlagsForTooltipMouse = ImGuiHoveredFlags_Stationary | ImGuiHoveredFlags_DelayShort;    // Default flags when using IsItemHovered(ImGuiHoveredFlags_ForTooltip) or BeginItemTooltip()/SetItemTooltip() while using mouse.
-    HoverFlagsForTooltipNav = ImGuiHoveredFlags_NoSharedDelay | ImGuiHoveredFlags_DelayNormal;  // Default flags when using IsItemHovered(ImGuiHoveredFlags_ForTooltip) or BeginItemTooltip()/SetItemTooltip() while using keyboard/gamepad.
+    HoverFlagsForTooltipMouse = ImGuiHoveredFlags_Stationary | ImGuiHoveredFlags_DelayShort | ImGuiHoveredFlags_AllowWhenDisabled;    // Default flags when using IsItemHovered(ImGuiHoveredFlags_ForTooltip) or BeginItemTooltip()/SetItemTooltip() while using mouse.
+    HoverFlagsForTooltipNav = ImGuiHoveredFlags_NoSharedDelay | ImGuiHoveredFlags_DelayNormal | ImGuiHoveredFlags_AllowWhenDisabled;  // Default flags when using IsItemHovered(ImGuiHoveredFlags_ForTooltip) or BeginItemTooltip()/SetItemTooltip() while using keyboard/gamepad.
 
     // Default theme
     ImGui::StyleColorsDark(this);

imgui_demo.cpp

@@ -828,13 +828,18 @@ static void ShowDemoWindowWidgets()
 
         ImGui::SeparatorText("Custom");
 
+        HelpMarker(
+            "Passing ImGuiHoveredFlags_ForTooltip to IsItemHovered() is the preferred way to standardize"
+            "tooltip activation details across your application. You may however decide to use custom"
+            "flags for a specific tooltip instance.");
+
         // The following examples are passed for documentation purpose but may not be useful to most users.
         // Passing ImGuiHoveredFlags_Tooltip to IsItemHovered() will pull ImGuiHoveredFlags flags values from
         // 'style.HoverFlagsForTooltipMouse' or 'style.HoverFlagsForTooltipNav' depending on whether mouse or gamepad/keyboard is being used.
         // With default settings, ImGuiHoveredFlags_Tooltip is equivalent to ImGuiHoveredFlags_DelayShort + ImGuiHoveredFlags_Stationary.
         ImGui::Button("Manual", sz);
         if (ImGui::IsItemHovered(ImGuiHoveredFlags_ForTooltip))
-            ImGui::SetTooltip("I am a manually emitted tooltip");
+            ImGui::SetTooltip("I am a manually emitted tooltip.");
 
         ImGui::Button("DelayNone", sz);
         if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayNone))
@@ -846,12 +851,21 @@ static void ShowDemoWindowWidgets()
 
         ImGui::Button("DelayLong", sz);
         if (ImGui::IsItemHovered(ImGuiHoveredFlags_DelayNormal | ImGuiHoveredFlags_NoSharedDelay))
-            ImGui::SetTooltip("I am a tooltip with a long delay (%0.2f sec)", ImGui::GetStyle().HoverDelayNormal);
+            ImGui::SetTooltip("I am a tooltip with a long delay (%0.2f sec).", ImGui::GetStyle().HoverDelayNormal);
 
         ImGui::Button("Stationary", sz);
         if (ImGui::IsItemHovered(ImGuiHoveredFlags_Stationary))
             ImGui::SetTooltip("I am a tooltip requiring mouse to be stationary before activating.");
 
+        // Using ImGuiHoveredFlags_ForTooltip will pull flags from 'style.HoverFlagsForTooltipMouse' or 'style.HoverFlagsForTooltipNav',
+        // which default value include the ImGuiHoveredFlags_AllowWhenDisabled flag.
+        // As a result, Set
+        ImGui::BeginDisabled();
+        ImGui::Button("Disabled item", sz);
+        ImGui::EndDisabled();
+        if (ImGui::IsItemHovered(ImGuiHoveredFlags_ForTooltip))
+            ImGui::SetTooltip("I am a a tooltip for a disabled item.");
+
         ImGui::TreePop();
     }