Added scroll tracking example with SetScrollPosHere() (relate #150)

imgui.cpp

@@ -11461,6 +11461,32 @@ void ImGui::ShowTestWindow(bool* opened)
 
  ImGui::TreePop();
  }
+
+ if (ImGui::TreeNode("Scrolling"))
+ {
+ ImGui::TextWrapped("Use SetScrollPosHere() to scroll to a given position.");
+ static bool track = true;
+ static int track_line = 50;
+ ImGui::Checkbox("Track", &track);
+ ImGui::SameLine(); ImGui::SliderInt("##line", &track_line, 0, 99, "Line %.0f");
+
+ for (int i = 0; i < 3; i++)
+ {
+ if (i > 0) ImGui::SameLine();
+ ImGui::BeginGroup();
+ ImGui::Text(i == 0 ? "Top" : i == 1 ? "Center" : "Bottom");
+ ImGui::BeginChild(ImGui::GetID((void *)i), ImVec2(ImGui::GetWindowWidth() * 0.25f, 200.0f), true);
+ for (int line = 0; line < 100; line++)
+ {
+ ImGui::Text("Line %d", line);
+ if (track && line == track_line)
+ ImGui::SetScrollPosHere(i * 0.50f); // 0.0f,0.5f,1.0f
+ }
+ ImGui::EndChild();
+ ImGui::EndGroup();
+ }
+ ImGui::TreePop();
+ }
  }
 
  if (ImGui::CollapsingHeader("Popups & Modal windows"))