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Add jump-to-bottom indicator in chat when scrolled up

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Shows a "New messages" button below the chat history area when the
user has scrolled away from the latest messages. Clicking it jumps
back to the most recent messages.
This commit is contained in:
Kelsi 2026-03-11 23:24:27 -07:00
parent c433188edb
commit 88436fa400
2 changed files with 25 additions and 3 deletions
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26
src/ui/game_screen.cpp
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@ -1462,9 +1462,18 @@ void GameScreen::renderChatWindow(game::GameHandler& gameHandler) {
ImGui::PopID();
}
// Auto-scroll to bottom
if (ImGui::GetScrollY() >= ImGui::GetScrollMaxY()) {
ImGui::SetScrollHereY(1.0f);
// Auto-scroll to bottom; track whether user has scrolled up
{
float scrollY = ImGui::GetScrollY();
float scrollMaxY = ImGui::GetScrollMaxY();
bool atBottom = (scrollMaxY <= 0.0f) || (scrollY >= scrollMaxY - 2.0f);
if (atBottom || chatForceScrollToBottom_) {
ImGui::SetScrollHereY(1.0f);
chatScrolledUp_ = false;
chatForceScrollToBottom_ = false;
} else {
chatScrolledUp_ = true;
}
}
ImGui::EndChild();
@ -1472,6 +1481,17 @@ void GameScreen::renderChatWindow(game::GameHandler& gameHandler) {
// Reset font scale after chat history
ImGui::SetWindowFontScale(1.0f);
// "Jump to bottom" indicator when scrolled up
if (chatScrolledUp_) {
ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0.2f, 0.35f, 0.7f, 0.9f));
ImGui::PushStyleColor(ImGuiCol_ButtonHovered, ImVec4(0.3f, 0.5f, 0.9f, 1.0f));
if (ImGui::SmallButton(" v New messages ")) {
chatForceScrollToBottom_ = true;
}
ImGui::PopStyleColor(2);
ImGui::SameLine();
}
ImGui::Spacing();
ImGui::Separator();
ImGui::Spacing();