ui.h

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef RECOVERY_UI_H
#define RECOVERY_UI_H

// Initialize the graphics system.
void ui_init();

// Use KEY_* codes from <linux/input.h> or KEY_DREAM_* from "minui/minui.h".
int ui_wait_key();            // waits for a key/button press, returns the code
int ui_key_pressed(int key);  // returns >0 if the code is currently pressed
int ui_text_visible();        // returns >0 if text log is currently visible
int ui_text_ever_visible();   // returns >0 if text log was ever visible
void ui_show_text(int visible);
void ui_clear_key_queue();

// Write a message to the on-screen log shown with Alt-L (also to stderr).
// The screen is small, and users may need to report these messages to support,
// so keep the output short and not too cryptic.
void ui_print(const char *fmt, ...) __attribute__((format(printf, 1, 2)));

// Display some header text followed by a menu of items, which appears
// at the top of the screen (in place of any scrolling ui_print()
// output, if necessary).
void ui_start_menu(const char* const * headers, const char* const * items,
                   int initial_selection);
// Set the menu highlight to the given index, and return it (capped to
// the range [0..numitems).
int ui_menu_select(int sel);
// End menu mode, resetting the text overlay so that ui_print()
// statements will be displayed.
void ui_end_menu();

// Set the icon (normally the only thing visible besides the progress bar).
enum {
  BACKGROUND_ICON_NONE,
  BACKGROUND_ICON_INSTALLING,
  BACKGROUND_ICON_ERROR,
  NUM_BACKGROUND_ICONS
};
void ui_set_background(int icon);

// Show a progress bar and define the scope of the next operation:
//   portion - fraction of the progress bar the next operation will use
//   seconds - expected time interval (progress bar moves at this minimum rate)
void ui_show_progress(float portion, int seconds);
void ui_set_progress(float fraction);  // 0.0 - 1.0 within the defined scope

// Default allocation of progress bar segments to operations
static const int VERIFICATION_PROGRESS_TIME = 60;
static const float VERIFICATION_PROGRESS_FRACTION = 0.25;
static const float DEFAULT_FILES_PROGRESS_FRACTION = 0.4;
static const float DEFAULT_IMAGE_PROGRESS_FRACTION = 0.1;

// Show a rotating "barberpole" for ongoing operations.  Updates automatically.
void ui_show_indeterminate_progress();

// Hide and reset the progress bar.
void ui_reset_progress();

#endif  // RECOVERY_UI_H