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116 lines
4.4 KiB
Markdown
116 lines
4.4 KiB
Markdown
# imgui-filebrowser
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[imgui-filebrowser](https://github.com/AirGuanZ/imgui-filebrowser) is a header-only file browser implementation for [dear-imgui](https://github.com/ocornut/imgui). C++ 17 is required.
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## Getting Started
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`imfilebrowser.h` should be included after `imgui.h`:
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```cpp
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#include <imgui.h>
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#include <imfilebrowser.h>
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```
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Instead of creating a file dialog with an immediate function call, you need to create a `ImGui::FileBrowser` instance, open it with member function `Open()`, and call `Display()` in each frame. Here is a simple example:
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```cpp
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#include <imgui.h>
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#include <imfilebrowser.h>
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int main()
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{
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//...initialize rendering window and imgui
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// create a file browser instance
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ImGui::FileBrowser fileDialog;
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// (optional) set browser properties
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fileDialog.SetTitle("title");
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fileDialog.SetTypeFilters({ ".h", ".cpp" });
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// mainloop
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while(continueRendering)
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{
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//...do other stuff like ImGui::NewFrame();
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if(ImGui::Begin("dummy window"))
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{
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// open file dialog when user clicks this button
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if(ImGui::Button("open file dialog"))
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fileDialog.Open();
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}
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ImGui::End();
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fileDialog.Display();
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if(fileDialog.HasSelected())
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{
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std::cout << "Selected filename" << fileDialog.GetSelected().string() << std::endl;
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fileDialog.ClearSelected();
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}
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//...do other stuff like ImGui::Render();
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}
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//...shutdown
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}
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```
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## Options
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Various options can be combined with '|' and passed to the constructor:
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```cpp
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enum ImGuiFileBrowserFlags_
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{
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ImGuiFileBrowserFlags_SelectDirectory = 1 << 0, // select directory instead of regular file
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ImGuiFileBrowserFlags_EnterNewFilename = 1 << 1, // allow user to enter new filename when selecting regular file
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ImGuiFileBrowserFlags_NoModal = 1 << 2, // file browsing window is modal by default. specify this to use a popup window
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ImGuiFileBrowserFlags_NoTitleBar = 1 << 3, // hide window title bar
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ImGuiFileBrowserFlags_NoStatusBar = 1 << 4, // hide status bar at the bottom of browsing window
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ImGuiFileBrowserFlags_CloseOnEsc = 1 << 5, // close file browser when pressing 'ESC'
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ImGuiFileBrowserFlags_CreateNewDir = 1 << 6, // allow user to create new directory
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ImGuiFileBrowserFlags_MultipleSelection = 1 << 7, // allow user to select multiple files. this will hide ImGuiFileBrowserFlags_EnterNewFilename
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};
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```
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When `ImGuiFileBrowserFlags_MultipleSelection` is enabled, use `fileBrowser.GetMultiSelected()` to get all selected filenames (instead of `fileBrowser.GetSelected()`, which returns only one of them).
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Here are some common examples:
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```cpp
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// select single regular file for opening
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0
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// select multiple regular files for opening
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ImGuiFileBrowserFlags_MultipleSelection
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// select single directory for opening
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ImGuiFileBrowserFlags_SelectDirectory
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// select multiple directories for opening
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ImGuiFileBrowserFlags_SelectDirectory | ImGuiFileBrowserFlags_MultipleSelection
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// select single regular file for saving
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ImGuiFileBrowserFlags_EnterNewFilename | ImGuiFileBrowserFlags_CreateNewDir
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// select single directory for saving
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ImGuiFileBrowserFlags_SelectDirectory | ImGuiFileBrowserFlags_CreateNewDir
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```
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## Usage
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* double click to enter a directory
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* single click to (de)select a regular file (or directory, when `ImGuiFileBrowserFlags_SelectDirectory` is enabled)
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* When `ImGuiFileBrowserFlags_SelectDirectory` is enabled and no directory is selected, click `ok` to choose the current directory as selected result
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* When `ImGuiFileBrowserFlags_MultipleSelection` is enabled, hold `Shift` or `Ctrl` to select more than one file
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* When `ImGuiFileBrowserFlags_CreateNewDir` is enabled, click the top-right little button "+" to create a new directory
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* When `ImGuiFileBrowserFlags_SelectDirectory` is not specified, double click to choose a regular file as selected result.
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## Type Filters
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* (optionally) use `browser.SetTypeFilters({".h", ".cpp"})` to set file extension filters.
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* ".*" matches with any extension
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* filters are case-insensitive on Windows platform
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## Note
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The filebrowser implementation queries drive list via Win32 API (only on Windows). Thus `<Windows.h>` is included in `<imfilebrowser.h>`, which may pollute the global namespace. This can be solved by simply moving the `GetDrivesBitMask()` definition into a cpp file.
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