Dialogs

Overview

The dialogs library (at 0:/os/libdialogs.lib) provides the following system dialogs across apps:

File selection (Open)
File save location selection (Save)
Print setup/submission
Message Box popups

Message Box

message_box displays a popup window with text and buttons.

gui::dialogs::MessageBoxResult message_box(
    const char* title,
    const char* message,
    gui::dialogs::MessageBoxButtons buttons = gui::dialogs::MESSAGE_BOX_OK,
    char* out_message = nullptr,
    int out_message_len = 0);

Button Sets

Value	Buttons
MESSAGE_BOX_OK	OK
MESSAGE_BOX_OK_CANCEL	OK, Cancel
MESSAGE_BOX_YES_NO	Yes, No
MESSAGE_BOX_YES_NO_CANCEL	Yes, No, Cancel

Results

Value	Meaning
MESSAGE_BOX_RESULT_OK	The user selected OK.
MESSAGE_BOX_RESULT_CANCEL	The user selected Cancel or closed a cancelable dialog.
MESSAGE_BOX_RESULT_YES	The user selected Yes.
MESSAGE_BOX_RESULT_NO	The user selected No, or closed a Yes/No dialog.
MESSAGE_BOX_RESULT_NONE	The dialog could not be loaded or invoked.

Example

#include <gui/dialogs.hpp>

void show_confirm() {
    auto result = gui::dialogs::message_box(
        "Close Document",
        "Discard unsaved changes?",
        gui::dialogs::MESSAGE_BOX_YES_NO_CANCEL);

    if (result == gui::dialogs::MESSAGE_BOX_RESULT_YES) {
        /* discard and close */
    }
}

Message box asking whether to discard unsaved changes

Example MESSAGE_BOX_YES_NO_CANCEL dialog.

File Dialogs

File dialog helpers allow applications to use graphical file selection views (similar to the Files app) to select paths for Open/Save operations.

bool open_file(
    const char* title,
    const char* initial_path,
    char* out_path,
    int out_path_len,
    char* out_message = nullptr,
    int out_message_len = 0);

bool save_file(
    const char* title,
    const char* initial_path,
    const char* suggested_name,
    char* out_path,
    int out_path_len,
    char* out_message = nullptr,
    int out_message_len = 0);

Use initial_path to select the starting directory or current file context. save_file also accepts a suggested_name for the filename field.

Open Example

char path[256];
char message[160];

if (gui::dialogs::open_file("Open File", "", path, sizeof(path),
                            message, sizeof(message))) {
    /* open path */
}

Save Example

char path[256];

if (gui::dialogs::save_file("Save File", "", "untitled.txt",
                            path, sizeof(path))) {
    /* write path */
}

Save file dialog showing folders and a filename field

Save-file dialog as used by the MontaukOS Word Processor app.

Print Dialogs

Print dialog helpers allow applications to expose printer configuration to the user, and submit a file for printing.

bool configure_print(
    const char* title,
    const char* initial_printer_uri,
    const char* job_name,
    char* out_printer_uri,
    int out_printer_uri_len,
    char* out_printer_name,
    int out_printer_name_len,
    uint32_t* out_copies = nullptr,
    char* out_message = nullptr,
    int out_message_len = 0);

bool print_file(
    const char* title,
    const char* source_path,
    const char* job_name,
    char* out_job_id,
    int out_job_id_len,
    char* out_message = nullptr,
    int out_message_len = 0);

Include

#include <gui/dialogs.hpp>

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