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Examples: Console:: added support for History callbacks + cleanup to be self contained.
This commit is contained in:
ocornut
parent
da5227fa28
commit
74ab555558
253
imgui.cpp
253
imgui.cpp
@ -7474,26 +7474,154 @@ static void ShowExampleAppFixedOverlay(bool* opened)
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struct ExampleAppConsole
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{
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char InputBuf[256];
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ImVector<char*> Items;
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bool NewItems;
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bool ScrollToBottom;
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ImVector<char*> History;
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int HistoryPos; // -1: new line, 0..History.size()-1 browsing history.
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ImVector<const char*> Commands;
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void Clear()
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ExampleAppConsole()
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{
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ClearLog();
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HistoryPos = -1;
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Commands.push_back("HELP");
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Commands.push_back("HISTORY");
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Commands.push_back("CLEAR");
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Commands.push_back("CLASSIFY"); // "classify" is here to provide an example of "C"+[tab] completing to "CL" and displaying matches.
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}
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~ExampleAppConsole()
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{
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ClearLog();
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for (size_t i = 0; i < Items.size(); i++)
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ImGui::MemFree(History[i]);
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}
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void ClearLog()
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{
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for (size_t i = 0; i < Items.size(); i++)
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ImGui::MemFree(Items[i]);
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Items.clear();
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NewItems = true;
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ScrollToBottom = true;
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}
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void AddLog(const char* fmt, ...)
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{
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char buf[512];
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char buf[1024];
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va_list args;
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va_start(args, fmt);
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ImFormatStringV(buf, IM_ARRAYSIZE(buf), fmt, args);
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va_end(args);
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Items.push_back(ImStrdup(buf));
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NewItems = true;
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ScrollToBottom = true;
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}
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void Run(const char* title, bool* opened)
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{
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if (!ImGui::Begin(title, opened, ImVec2(520,600)))
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{
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ImGui::End();
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return;
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}
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ImGui::TextWrapped("This example implement a console with basic coloring, completion and history. A more elaborate implementation may want to store entries along with extra data such as timestamp, emitter, etc.");
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ImGui::TextWrapped("Enter 'HELP' for help, press TAB to use text completion.");
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// TODO: display from bottom
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// TODO: clip manually
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if (ImGui::SmallButton("Add Dummy Text")) AddLog("some text\nsome more text\ndisplay very important message here!\n"); ImGui::SameLine();
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if (ImGui::SmallButton("Add Dummy Error")) AddLog("[error] something went wrong"); ImGui::SameLine();
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if (ImGui::SmallButton("Clear")) ClearLog();
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ImGui::Separator();
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ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0,0));
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static ImGuiTextFilter filter;
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filter.Draw("Filter (\"incl,-excl\") (\"error\")", 180);
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if (ImGui::IsItemHovered()) ImGui::SetKeyboardFocusHere(-1); // Auto focus on hover
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ImGui::PopStyleVar();
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ImGui::Separator();
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// Display every line as a separate entry so we can change their color or add custom widgets. If you only want raw text you can use ImGui::TextUnformatted(log.begin(), log.end());
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// NB- if you have lots of text this approach may be too inefficient. You can seek and display only the lines that are on display using a technique similar to what TextUnformatted() does,
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// or faster if your entries are already stored into a table.
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ImGui::BeginChild("ScrollingRegion", ImVec2(0,-ImGui::GetTextLineSpacing()*2));
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ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(4,1)); // Tighten spacing
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for (size_t i = 0; i < Items.size(); i++)
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{
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const char* item = Items[i];
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if (!filter.PassFilter(item))
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continue;
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ImVec4 col(1,1,1,1); // A better implement may store a type per-item. For the sample let's just parse the text.
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if (strstr(item, "[error]")) col = ImVec4(1.0f,0.4f,0.4f,1.0f);
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else if (strncmp(item, "# ", 2) == 0) col = ImVec4(1.0f,0.8f,0.6f,1.0f);
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ImGui::PushStyleColor(ImGuiCol_Text, col);
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ImGui::TextUnformatted(item);
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ImGui::PopStyleColor();
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}
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if (ScrollToBottom)
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ImGui::SetScrollPosHere();
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ScrollToBottom = false;
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ImGui::PopStyleVar();
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ImGui::EndChild();
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ImGui::Separator();
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// Command-line
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if (ImGui::InputText("Input", InputBuf, IM_ARRAYSIZE(InputBuf), ImGuiInputTextFlags_EnterReturnsTrue|ImGuiInputTextFlags_CallbackCompletion|ImGuiInputTextFlags_CallbackHistory, &TextEditCallbackStub, (void*)this))
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{
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char* input_end = InputBuf+strlen(InputBuf);
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while (input_end > InputBuf && input_end[-1] == ' ') input_end--; *input_end = 0;
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if (InputBuf[0])
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ExecCommand(InputBuf);
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strcpy(InputBuf, "");
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}
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if (ImGui::IsItemHovered()) ImGui::SetKeyboardFocusHere(-1); // Auto focus on hover
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ImGui::End();
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}
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void ExecCommand(const char* command_line)
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{
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AddLog("# %s\n", command_line);
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// Insert into history. First find match and delete it so it can be pushed to the back. This isn't trying to be smart or optimal.
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HistoryPos = -1;
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for (int i = (int)History.size()-1; i >= 0; i--)
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if (ImStricmp(History[i], command_line) == 0)
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{
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ImGui::MemFree(History[i]);
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History.erase(History.begin() + i);
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break;
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}
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History.push_back(ImStrdup(command_line));
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// Process command
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if (ImStricmp(command_line, "CLEAR") == 0)
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{
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ClearLog();
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}
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else if (ImStricmp(command_line, "HELP") == 0)
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{
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AddLog("Commands:");
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for (size_t i = 0; i < Commands.size(); i++)
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AddLog("- %s", Commands[i]);
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}
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else if (ImStricmp(command_line, "HISTORY") == 0)
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{
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for (size_t i = History.size() >= 10 ? History.size() - 10 : 0; i < History.size(); i++)
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AddLog("%3d: %s\n", i, History[i]);
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}
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else
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{
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AddLog("Unknown command: '%s'\n", command_line);
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}
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}
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static void TextEditCallbackStub(ImGuiTextEditCallbackData* data)
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{
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ExampleAppConsole* console = (ExampleAppConsole*)data->UserData;
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console->TextEditCallback(data);
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}
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void TextEditCallback(ImGuiTextEditCallbackData* data)
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@ -7517,11 +7645,10 @@ struct ExampleAppConsole
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}
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// Build a list of candidates
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const char* commands[] = { "HELP", "CLEAR", "CLASSIFY" };
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ImVector<const char*> candidates;
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for (size_t i = 0; i < IM_ARRAYSIZE(commands); i++)
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if (ImStrnicmp(commands[i], word_start, (int)(word_end-word_start)) == 0)
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candidates.push_back(commands[i]);
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for (size_t i = 0; i < Commands.size(); i++)
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if (ImStrnicmp(Commands[i], word_start, (int)(word_end-word_start)) == 0)
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candidates.push_back(Commands[i]);
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if (candidates.size() == 0)
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{
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@ -7544,12 +7671,10 @@ struct ExampleAppConsole
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int c = 0;
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bool all_candidates_matches = true;
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for (size_t i = 0; i < candidates.size() && all_candidates_matches; i++)
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{
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if (i == 0)
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c = toupper(candidates[i][match_len]);
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else if (c != toupper(candidates[i][match_len]))
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all_candidates_matches = false;
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}
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if (!all_candidates_matches)
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break;
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match_len++;
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@ -7569,91 +7694,41 @@ struct ExampleAppConsole
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break;
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}
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case ImGuiKey_UpArrow:
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case ImGuiKey_DownArrow:
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{
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// Example of HISTORY
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const int prev_history_pos = HistoryPos;
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if (data->EventKey == ImGuiKey_UpArrow)
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{
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if (HistoryPos == -1)
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HistoryPos = History.size() - 1;
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else if (HistoryPos > 0)
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HistoryPos--;
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}
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else if (data->EventKey == ImGuiKey_DownArrow)
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{
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if (HistoryPos != -1)
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if (++HistoryPos >= (int)History.size())
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HistoryPos = -1;
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}
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// A better implementation would preserve the data on the current input line along with cursor position.
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if (prev_history_pos != HistoryPos)
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{
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ImFormatString(data->Buf, data->BufSize, "%s", (HistoryPos >= 0) ? History[HistoryPos] : "");
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data->BufDirty = true;
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data->CursorPos = data->SelectionStart = data->SelectionEnd = strlen(data->Buf);
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}
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}
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}
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}
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};
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static void ShowExampleAppConsole_TextEditCallback(ImGuiTextEditCallbackData* data)
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{
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ExampleAppConsole* console = (ExampleAppConsole*)data->UserData;
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console->TextEditCallback(data);
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}
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static void ShowExampleAppConsole(bool* opened)
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{
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if (!ImGui::Begin("Example: Console", opened, ImVec2(520,600)))
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{
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ImGui::End();
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return;
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}
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ImGui::TextWrapped("This example implement a simple console. A more elaborate implementation may want to store individual entries along with extra data such as timestamp, emitter, etc.");
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ImGui::TextWrapped("Press TAB to use text completion.");
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// TODO: display from bottom
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// TODO: clip manually
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// TODO: history
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static ExampleAppConsole console;
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static char input[256] = "";
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if (ImGui::SmallButton("Add Dummy Text")) console.AddLog("some text\nsome more text");
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ImGui::SameLine();
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if (ImGui::SmallButton("Add Dummy Error")) console.AddLog("[error] something went wrong");
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ImGui::SameLine();
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if (ImGui::SmallButton("Clear all")) console.Clear();
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ImGui::Separator();
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ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0,0));
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static ImGuiTextFilter filter;
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filter.Draw("Filter (\"incl,-excl\") (\"error\")", 180);
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if (ImGui::IsItemHovered()) ImGui::SetKeyboardFocusHere(-1); // Auto focus on hover
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ImGui::PopStyleVar();
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ImGui::Separator();
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ImGui::BeginChild("ScrollingRegion", ImVec2(0,-ImGui::GetTextLineSpacing()*2));
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// Display every line as a separate entry so we can change their color or add custom widgets. If you only want raw text you can use ImGui::TextUnformatted(log.begin(), log.end());
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// NB- if you have lots of text this approach may be too inefficient. You can seek and display only the lines that are on display using a technique similar to what TextUnformatted() does,
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// or faster if your entries are already stored into a table.
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ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(4,1)); // tighten spacing
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ImGui::GetStyle().ItemSpacing.y = 1; // tighten spacing
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for (size_t i = 0; i < console.Items.size(); i++)
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{
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const char* item = console.Items[i];
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if (!filter.PassFilter(item))
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continue;
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ImVec4 col(1,1,1,1);
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if (strstr(item, "[error]")) col = ImVec4(1.0f,0.4f,0.4f,1.0f);
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else if (strncmp(item, "# ", 2) == 0) col = ImVec4(1.0f,0.8f,0.6f,1.0f);
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ImGui::PushStyleColor(ImGuiCol_Text, col);
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ImGui::TextUnformatted(item);
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ImGui::PopStyleColor();
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}
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ImGui::PopStyleVar();
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if (console.NewItems)
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{
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ImGui::SetScrollPosHere();
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console.NewItems = false;
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}
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ImGui::EndChild();
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ImGui::Separator();
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if (ImGui::InputText("Input", input, IM_ARRAYSIZE(input), ImGuiInputTextFlags_EnterReturnsTrue|ImGuiInputTextFlags_CallbackCompletion, &ShowExampleAppConsole_TextEditCallback, (void*)&console))
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{
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const char* input_trimmed_end = input+strlen(input);
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while (input_trimmed_end > input && input_trimmed_end[-1] == ' ')
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input_trimmed_end--;
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if (input_trimmed_end > input)
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{
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console.AddLog("# %s\n", input);
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console.AddLog("Unknown command: '%.*s'\n", input_trimmed_end-input, input); // NB: we don't actually handle any command in this sample code
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}
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strcpy(input, "");
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}
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if (ImGui::IsItemHovered()) ImGui::SetKeyboardFocusHere(-1); // Auto focus on hover
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ImGui::End();
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console.Run("Example: Console", opened);
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}
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static void ShowExampleAppLongText(bool* opened)
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