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//! File dialog for opening and saving files.
//!
//! Wraps [`QFileDialog`](https://doc.qt.io/qt-6/qfiledialog.html).
use cxx::let_cxx_string;
use crate::ffi;
use crate::widget::AsWidget;
/// File dialog convenience functions.
///
/// Provides static methods for common file selection operations.
///
/// # Example
///
/// ```no_run
/// use qtrs::FileDialog;
///
/// // Open a file
/// if let Some(path) = FileDialog::open_file(None, "Open Image", "", "Images (*.png *.jpg)") {
/// println!("Selected: {}", path);
/// }
///
/// // Save a file
/// if let Some(path) = FileDialog::save_file(None, "Save Document", "", "Text Files (*.txt)") {
/// println!("Save to: {}", path);
/// }
///
/// // Select a directory
/// if let Some(path) = FileDialog::select_directory(None, "Select Folder", "") {
/// println!("Selected dir: {}", path);
/// }
/// ```
pub struct FileDialog;
impl FileDialog {
/// Open a single file.
///
/// # Parameters
///
/// * `parent` — Optional parent widget
/// * `caption` — Dialog title
/// * `dir` — Starting directory (empty for default)
/// * `filter` — File filter, e.g. `"Images (*.png *.jpg)"`
///
/// # Returns
///
/// `Some(path)` if a file was selected, `None` if cancelled.
pub fn open_file(
parent: Option<&dyn AsWidget>,
caption: &str,
dir: &str,
filter: &str,
) -> Option<String> {
let parent_ptr = parent.map(|p| p.widget_ptr()).unwrap_or(std::ptr::null_mut());
let_cxx_string!(c_caption = caption);
let_cxx_string!(c_dir = dir);
let_cxx_string!(c_filter = filter);
let result = unsafe {
ffi::QFileDialog_getOpenFileName(
parent_ptr,
&c_caption,
&c_dir,
&c_filter,
)
};
if result.is_empty() { None } else { Some(result) }
}
/// Open multiple files.
///
/// # Parameters
///
/// * `parent` — Optional parent widget
/// * `caption` — Dialog title
/// * `dir` — Starting directory (empty for default)
/// * `filter` — File filter, e.g. `"Images (*.png *.jpg)"`
///
/// # Returns
///
/// A vector of selected file paths, empty if cancelled.
pub fn open_files(
parent: Option<&dyn AsWidget>,
caption: &str,
dir: &str,
filter: &str,
) -> Vec<String> {
let parent_ptr = parent.map(|p| p.widget_ptr()).unwrap_or(std::ptr::null_mut());
let_cxx_string!(c_caption = caption);
let_cxx_string!(c_dir = dir);
let_cxx_string!(c_filter = filter);
unsafe {
ffi::QFileDialog_getOpenFileNames(
parent_ptr,
&c_caption,
&c_dir,
&c_filter,
)
}
}
/// Save a file.
///
/// # Parameters
///
/// * `parent` — Optional parent widget
/// * `caption` — Dialog title
/// * `dir` — Starting directory (empty for default)
/// * `filter` — File filter, e.g. `"Text Files (*.txt)"`
///
/// # Returns
///
/// `Some(path)` if a file was selected, `None` if cancelled.
pub fn save_file(
parent: Option<&dyn AsWidget>,
caption: &str,
dir: &str,
filter: &str,
) -> Option<String> {
let parent_ptr = parent.map(|p| p.widget_ptr()).unwrap_or(std::ptr::null_mut());
let_cxx_string!(c_caption = caption);
let_cxx_string!(c_dir = dir);
let_cxx_string!(c_filter = filter);
let result = unsafe {
ffi::QFileDialog_getSaveFileName(
parent_ptr,
&c_caption,
&c_dir,
&c_filter,
)
};
if result.is_empty() { None } else { Some(result) }
}
/// Select an existing directory.
///
/// # Parameters
///
/// * `parent` — Optional parent widget
/// * `caption` — Dialog title
/// * `dir` — Starting directory (empty for default)
///
/// # Returns
///
/// `Some(path)` if a directory was selected, `None` if cancelled.
pub fn select_directory(
parent: Option<&dyn AsWidget>,
caption: &str,
dir: &str,
) -> Option<String> {
let parent_ptr = parent.map(|p| p.widget_ptr()).unwrap_or(std::ptr::null_mut());
let_cxx_string!(c_caption = caption);
let_cxx_string!(c_dir = dir);
let result = unsafe {
ffi::QFileDialog_getExistingDirectory(
parent_ptr,
&c_caption,
&c_dir,
)
};
if result.is_empty() { None } else { Some(result) }
}
}