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Demo: Add filtering to log with better-than-none storage of line offsets.

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This commit is contained in:
ocornut 2015-08-13 21:47:50 -06:00
parent 42567a9516
commit b770f3ffaf
1 changed files with 40 additions and 6 deletions
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46
imgui_demo.cpp
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@ -1952,16 +1952,22 @@ static void ShowExampleAppConsole(bool* opened)
struct ExampleAppLog
{
ImGuiTextBuffer Buf;
ImGuiTextFilter Filter;
ImVector<int> LineOffsets; // Index to lines offset
bool ScrollToBottom;
void Clear() { Buf.clear(); }
void Clear() { Buf.clear(); LineOffsets.clear(); }
void AddLog(const char* fmt, ...) IM_PRINTFARGS(2)
{
int old_size = Buf.size();
va_list args;
va_start(args, fmt);
Buf.appendv(fmt, args);
va_end(args);
for (int new_size = Buf.size(); old_size < new_size; old_size++)
if (Buf[old_size] == '\n')
LineOffsets.push_back(old_size);
ScrollToBottom = true;
}
@ -1969,17 +1975,44 @@ struct ExampleAppLog
{
ImGui::SetNextWindowSize(ImVec2(500,400), ImGuiSetCond_FirstUseEver);
ImGui::Begin(title, p_opened);
if (ImGui::Button("Clear")) Buf.clear();
if (ImGui::Button("Clear")) Clear();
ImGui::SameLine();
bool copy = ImGui::Button("Copy");
ImGui::SameLine();
Filter.Draw();
ImGui::Separator();
ImGui::BeginChild("scrolling");
if (copy)
ImGui::LogToClipboard();
ImGui::TextUnformatted(Buf.begin());
ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(0,0));
if (copy) ImGui::LogToClipboard();
// We provide coarse vertical clipping of the filtered result to make it a little faster.
if (Filter.IsActive())
{
int display_start = 0, display_end = 0, displayed_count = 0;
ImGui::CalcListClipping(INT_MAX, ImGui::GetTextLineHeight(), &display_start, &display_end);
const char* buf_begin = Buf.begin();
const char* line = buf_begin;
for (int line_no = 0; line != NULL; line_no++)
{
const char* line_end = (line_no < LineOffsets.Size) ? buf_begin + LineOffsets[line_no] : NULL;
if (Filter.PassFilter(line, line_end))
{
if (displayed_count >= display_start && displayed_count < display_end)
ImGui::TextUnformatted(line, line_end);
displayed_count++;
}
line = line_end ? (line_end + 1) : NULL;
}
}
else
{
ImGui::TextUnformatted(Buf.begin());
}
if (ScrollToBottom)
ImGui::SetScrollHere(1.0f);
ScrollToBottom = false;
ImGui::PopStyleVar();
ImGui::EndChild();
ImGui::End();
}
@ -1994,7 +2027,8 @@ static void ShowExampleAppLog(bool* opened)
float time = ImGui::GetTime();
if (time - last_time >= 0.3f)
{
log.AddLog("Hello, time is %.1f sec, rand() is %d\n", time, (int)rand());
const char* random_words[] = { "system", "info", "warning", "error", "fatal", "notice", "log" };
log.AddLog("[%s] Hello, time is %.1f, rand() %d\n", random_words[rand() % IM_ARRAYSIZE(random_words)], time, (int)rand());
last_time = time;
}