56 lines
1.9 KiB
Markdown
56 lines
1.9 KiB
Markdown
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## Folder Selection API
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The `pfd::select_folder` class handles folder opening dialogs. It can be provided a title, and an
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optional starting directory:
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```cpp
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pfd::select_folder::select_folder(std::string const &title,
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std::string const &default_path = "",
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pfd::opt option = pfd::opt::none);
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```
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The `option` parameter can be `pfd::opt::force_path` to force the operating system to use the
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provided path. Some systems default to the most recently used path, if applicable.
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The selected folder is queried using `pfd::select_folder::result()`. If the user canceled the
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operation, the returned string is empty:
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```cpp
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std::string pfd::select_folder::result();
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```
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It is possible to ask the folder selection dialog whether the user took action using the
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`pfd::message::ready()` method, with an optional `timeout` argument. If the user did not validate
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the dialog within `timeout` milliseconds, the function will return `false`:
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```cpp
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bool pfd::select_folder::ready(int timeout = pfd::default_wait_timeout);
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```
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## Example 1: simple folder selection
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Using `pfd::select_folder::result()` will wait for user action before returning. This operation
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will block and return the user choice:
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```cpp
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auto selection = pfd::select_folder("Select a folder").result();
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if (!selection.empty())
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std::cout << "User selected folder " << selection << "\n";
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```
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## Example 2: asynchronous folder open
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Using `pfd::select_folder::ready()` allows the application to perform other tasks while waiting for user input:
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```cpp
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// Folder selection dialog
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auto dialog = pfd::select_folder("Select folder to open");
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// Do something while waiting for user input
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while (!dialog.ready(1000))
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std::cout << "Waited 1 second for user input...\n";
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// Act depending on the user choice
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std::cout << "Selected folder: " << dialog.result() << "\n";
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```
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