mirror of
https://github.com/tildearrow/furnace.git
synced 2024-12-05 02:37:26 +00:00
120 lines
3.6 KiB
Markdown
120 lines
3.6 KiB
Markdown
## Portable File Dialogs documentation
|
|
|
|
The library can be used either as a [header-only library](https://en.wikipedia.org/wiki/Header-only),
|
|
or as a [single file library](https://github.com/nothings/single_file_libs).
|
|
|
|
### Use as header-only library
|
|
|
|
Just include the main header file wherever needed:
|
|
|
|
```cpp
|
|
#include "portable-file-dialogs.h"
|
|
|
|
/* ... */
|
|
|
|
pfd::message::message("Hello", "This is a test");
|
|
|
|
/* ... */
|
|
```
|
|
|
|
### Use as a single-file library
|
|
|
|
Defining the `PFD_SKIP_IMPLEMENTATION` macro before including `portable-file-dialogs.h` will
|
|
skip all the implementation code and reduce compilation times. You still need to include the
|
|
header without the macro at least once, typically in a `pfd-impl.cpp` file.
|
|
|
|
```cpp
|
|
// In pfd-impl.cpp
|
|
#include "portable-file-dialogs.h"
|
|
```
|
|
|
|
```cpp
|
|
// In all other files
|
|
#define PFD_SKIP_IMPLEMENTATION 1
|
|
#include "portable-file-dialogs.h"
|
|
```
|
|
|
|
### General concepts
|
|
|
|
Dialogs inherit from `pfd::dialog` and are created by calling their class constructor. Their
|
|
destructor will block until the window is closed by user interaction. So for instance this
|
|
will block until the end of the line:
|
|
|
|
```cpp
|
|
pfd::message::message("Hi", "there");
|
|
```
|
|
|
|
Whereas this will only block until the end of the scope, allowing the program to perform
|
|
additional operations while the dialog is open:
|
|
|
|
```cpp
|
|
{
|
|
auto m = pfd::message::message("Hi", "there");
|
|
|
|
// ... perform asynchronous operations here
|
|
}
|
|
```
|
|
|
|
It is possible to call `bool pfd::dialog::ready(timeout)` on the dialog in order to query its
|
|
status and perform asynchronous operations as long as the user has not interacted:
|
|
|
|
```cpp
|
|
{
|
|
auto m = pfd::message::message("Hi", "there");
|
|
|
|
while (!m.ready())
|
|
{
|
|
// ... perform asynchronous operations here
|
|
}
|
|
}
|
|
```
|
|
|
|
If necessary, a dialog can be forcibly closed using `bool pfd::dialog::kill()`. Note that this
|
|
may be confusing to the user and should only be used in very specific situations. It is also not
|
|
possible to close a Windows message box that provides no _Cancel_ button.
|
|
|
|
```cpp
|
|
{
|
|
auto m = pfd::message::message("Hi", "there");
|
|
|
|
while (!m.ready())
|
|
{
|
|
// ... perform asynchronous operations here
|
|
|
|
if (too_much_time_has_passed())
|
|
m.kill();
|
|
}
|
|
}
|
|
```
|
|
|
|
Finally, the user response can be retrieved using `pfd::dialog::result()`. The return value of
|
|
this function depends on which dialog is being used. See their respective documentation for more
|
|
information:
|
|
|
|
* [`pfd::message`](message.md) (message box)
|
|
* [`pfd::notify`](notify.md) (notification)
|
|
* [`pfd::open_file`](open_file.md) (file open)
|
|
* [`pfd::save_file`](save_file.md) (file save)
|
|
* [`pfd::select_folder`](select_folder.md) (folder selection)
|
|
|
|
### Settings
|
|
|
|
The library can be queried and configured through the `pfd::settings` class.
|
|
|
|
```cpp
|
|
bool pfd::settings::available();
|
|
void pfd::settings::verbose(bool value);
|
|
void pfd::settings::rescan();
|
|
```
|
|
|
|
The return value of `pfd::settings::available()` indicates whether a suitable dialog backend (such
|
|
as Zenity or KDialog on Linux) has been found. If not, the library will not work and all dialog
|
|
invocations will be no-ops. The program will not crash but you should account for this situation
|
|
and add a fallback mechanism or exit gracefully.
|
|
|
|
Calling `pfd::settings::rescan()` will force a rescan of available backends. This may change the
|
|
result of `pfd::settings::available()` if a backend was installed on the system in the meantime.
|
|
This is probably only useful for debugging purposes.
|
|
|
|
Calling `pfd::settings::verbose(true)` may help debug the library. It will output debug information
|
|
to `std::cout` about some operations being performed.
|