Modifying the ImGui::InputText text

[jrynkiew]

Hi,

I have been trying for a while to figure out how to directly modify the ImGui::InputText text without performing all operations manally.

Basically, I am trying to use ImGui::InputText as the output for the ExampleAppConsole from the demo project, since the AddLog method in the demo does not allow the text to be selectable, only renders it on screen.

Currently, I am attempting to use the following code/pseudocode logic

Draw a ImGui::InputTextMultiline with a string consoleBuffer which I declare in the ExampleAppConsole struct, with a ImGuiInputTextFlags_ReadOnly flag.

ImGui::InputTextMultiline("Console", (char*)consoleBuffer.c_str(), strlen(consoleBuffer.c_str()), ImVec2(ImGui::GetWindowContentRegionMax().x, ImGui::GetWindowContentRegionMax().y), ImGuiInputTextFlags_ReadOnly);

In order to add output to this InputTextMultiline, I use the same logic as the ExampleAppConsole, so I use the ExecCommand function and manually append the consoleBuffer

consoleBuffer += "# > ";
consoleBuffer += command_line;
consoleBuffer += "\n";

I always make sure to add a newline character after each append, in order to imitate a terminal command line console.

I have two problems with this soluton:

1. I cannot manage to color the text seperately for each line using this logic method
2. How do I add text individually line by line to the InputTextMultiline text buffer?

As to my first problem, I am trying to solve it by doing a check inside InputTextEx by directly modifying the buffer just before it is passed to the AddText method

const char * error = strstr(buf_display, "[error]");
ImU32 col = GetColorU32(is_displaying_hint ? ImGuiCol_TextDisabled : ImGuiCol_Text);
ImU32 col2 = ImGui::GetColorU32(ImVec4(1.0f, 0.4f, 0.4f, 1.0f));
if(error)
{
   draw_window->DrawList->AddText(g.Font, g.FontSize, draw_pos - draw_scroll, col2, error, error + strlen(error), 0.0f, is_multiline ? NULL : &clip_rect);       
}
else{
   draw_window->DrawList->AddText(g.Font, g.FontSize, draw_pos - draw_scroll, col, buf_display, buf_display_end, 0.0f, is_multiline ? NULL : &clip_rect);
}

This solution sort of works, but it's definitely not ideal.

It looks like I will need to write a separate function, something like OutputTextMultiline, to specifically handle my usecase, unfortunately I am still new to ImGui and it will take me a lot of time.

Is there any way I can do something like this?

ImGui::GetInputTextState(ImGui::GetID("Console"))->InsertChar("text whatever")

This would solve my issues :)

[jrynkiew]

OK, I have discovered a similar project which already covers what I was attempting to do at https://github.com/BalazsJako/ImGuiColorTextEdit
Thanks anyway, and great project @ocornut !