Examples: displaying more font information.

imgui.cpp

@@ -11165,25 +11165,35 @@ void ImGui::ShowTestWindow(bool* opened)
         if (ImGui::TreeNode("Fonts", "Fonts (%d)", ImGui::GetIO().Fonts->Fonts.Size))
         {
             ImGui::TextWrapped("Tip: Load fonts with GetIO().Fonts->AddFontFromFileTTF().");
-            for (int i = 0; i < ImGui::GetIO().Fonts->Fonts.Size; i++)
+            ImFontAtlas* atlas = ImGui::GetIO().Fonts;
+            if (ImGui::TreeNode("Atlas texture"))
             {
-                ImFont* font = ImGui::GetIO().Fonts->Fonts[i];
+                ImGui::Image(atlas->TexID, ImVec2((float)atlas->TexWidth, (float)atlas->TexHeight), ImVec2(0,0), ImVec2(1,1), ImColor(255,255,255,255), ImColor(255,255,255,128));
+                ImGui::TreePop();
+            }
+            ImGui::PushItemWidth(100);
+            for (int i = 0; i < atlas->Fonts.Size; i++)
+            {
+                ImFont* font = atlas->Fonts[i];
                 ImGui::BulletText("Font %d: %.2f pixels, %d glyphs", i, font->FontSize, font->Glyphs.Size);
                 ImGui::TreePush((void*)i);
+                if (i > 0) { ImGui::SameLine(); if (ImGui::SmallButton("Set as default")) { atlas->Fonts[i] = atlas->Fonts[0]; atlas->Fonts[0] = font; } }
                 ImGui::PushFont(font);
                 ImGui::Text("The quick brown fox jumps over the lazy dog");
                 ImGui::PopFont();
-                if (i > 0 && ImGui::Button("Set as default"))
+                if (ImGui::TreeNode("Details"))
                 {
-                    ImGui::GetIO().Fonts->Fonts[i] = ImGui::GetIO().Fonts->Fonts[0];
+                    ImGui::DragFloat("font scale", &font->Scale, 0.005f, 0.3f, 2.0f, "%.1f");             // scale only this font
-                    ImGui::GetIO().Fonts->Fonts[0] = font;
+                    ImGui::Text("Ascent: %f, Descent: %f", font->Ascent, font->Descent);
+                    ImGui::Text("Fallback character: '%c' (%d)", font->FallbackChar, font->FallbackChar);
+                    ImGui::TreePop();
                 }
-                ImGui::SliderFloat("font scale", &font->Scale, 0.3f, 2.0f, "%.1f");             // scale only this font
                 ImGui::TreePop();
             }
             static float window_scale = 1.0f;
-            ImGui::SliderFloat("this window scale", &window_scale, 0.3f, 2.0f, "%.1f");                   // scale only this window
+            ImGui::DragFloat("this window scale", &window_scale, 0.005f, 0.3f, 2.0f, "%.1f");              // scale only this window
-            ImGui::SliderFloat("global scale", &ImGui::GetIO().FontGlobalScale, 0.3f, 2.0f, "%.1f"); // scale everything
+            ImGui::DragFloat("global scale", &ImGui::GetIO().FontGlobalScale, 0.005f, 0.3f, 2.0f, "%.1f"); // scale everything
+            ImGui::PopItemWidth();
             ImGui::SetWindowFontScale(window_scale);
             ImGui::TreePop();
         }