Benj
/
imgui
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Examples: Console:: added support for History callbacks + cleanup to be self contained.

Browse Source
docking
ocornut 10 years ago
parent da5227fa28
commit 74ab555558
1 changed files with 165 additions and 90 deletions
Show Stats Download Patch File Download Diff File

255
imgui.cpp
Unescape Escape View File

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

Write Preview
Loading…
Cancel
Save