Dev:Flipswitch

Flipswitch
Cydia Package
Package ID	com.a3tweaks.flipswitch
Latest Version	1.0.15

libflipswitch is a library used to implement a centralized toggle system. Flipswitch switches (or toggles) can be used as extensions of existing tweaks to provide an interface to enable/disable them.

How to use this library

Headers are available from Flipswitch's GitHub project and the library can be found at /usr/lib/libflipswitch.dylib on a device where Flipswitch is installed. If using Theos, place the headers in $THEOS/include/Flipswitch, the library in $THEOS/lib/.

Include directive

#import <Flipswitch/Flipswitch.h>

Makefile

Add to your Makefile:

• flipswitch to the XXX_LIBRARIES variable.

Packaging

Add to your package's control file:

• , com.a3tweaks.flipswitch to the Depends field.

How to make a new switch

To make a switch there are two methods, with or without code. It is recommended to add a glyph so your switch has a visual representation.

Preferred method

Save this NIC template to the $THEOS/templates/iphone directory and call $THEOS/bin/nic.pl to get a premade switch. Once built, it will be installed to /Library/Switches/.

There will be 2 methods already written in Switch.x. Here's a sample of a basic switch implementation template:

// Return the current state of the switch.
- (FSSwitchState)stateForSwitchIdentifier:(NSString *)switchIdentifier {
        return (getSwitchState())?FSSwitchStateOn:FSSwitchStateOff;
}

// Set a new state for the switch.
- (void)applyState:(FSSwitchState)newState forSwitchIdentifier:(NSString *)switchIdentifier {
	switch (newState) {
	case FSSwitchStateIndeterminate:
		break;
	case FSSwitchStateOn:
		// Enable your tweak
		break;
	case FSSwitchStateOff:
		// Disable your tweak
		break;
	}
	return;
}

// Provide a proper title instead of its bundle ID:
- (NSString *)titleForSwitchIdentifier:(NSString *)switchIdentifier {
	return @"my switch";
}

// Do something different when holding the switch
- (void)applyAlternateActionForSwitchIdentifier:(NSString *)switchIdentifier {
	// ...
	return;
}

If - (void)applyAlternateActionForSwitchIdentifier:(NSString *)switchIdentifier; is not implemented, Flipswitch will try to open a URL specified in the "alternate-action-url" key inside the Resources/Info.plist file

You will find the protocol with the list of methods to implement in FSSwitchDataSource.h located in your switch folder.

Note: all of the default implementations of the FSSwitchDataSource methods read data out of the bundle specified by bundleForSwitchIdentifier: (which defaults to the bundle that implements [self class]). You can either override the methods to return your own custom images or image paths or return a bundle and let all of the standard methods do their thing (this includes reading the title from CFBundleDisplayName, detecting if the switch is supported on the device using required-capabilities, and automatically installing an alternate/hold action by reading from alternate-action-url).

Plist method

This only requires an Info.plist added in your switch folder. This plist file should contain the basic keys for describing a bundle plus the following keys:

key	type	description
NSPrincipalClass	string	Class name to be used for the switch.
defaults	string	User defaults associated with this switch.
key	string	Key to be modified on the switch's defaults.
default	string	Default value of the switch.
negate	array	Save the opposite value.
PostNotification	string	Darwin notification string to be posted when a change happens.
alternate-action-url	string	URL to be opened when holding the switch.
lazy-load	BOOL	The bundle for the switch will only be loaded when querying the state or invoking the switch.

Uses FSLazySwitch as NSPrincipalClass when lazy-load set to true. The bundle will not be loaded when querying the title or the list of switches.

Set NSPrincipalClass to FSPreferenceSwitchDataSource for your switch to get the preference switch implementation.

See AirplaneMode and other switches for reference.

Glyphs

Glyphs are the visual part of the switch that should represent your switch's state. You should create black vector images with transparent background and save them as PDFs in your Resources folder, where an Info.plist file resides. Name them as follows:

Name	Description
glyph.pdf	Will be used when no glyph exists for the current state
glyph-on.pdf	Used on iOS < 7 for FSSwitchStateOn state
glyph-off.pdf	Used on iOS < 7 for FSSwitchStateOff state
glyph-indeterminate.pdf	Used on iOS < 7 for FSSwitchStateIndeterminatestate
glyph-modern.pdf	Will be used when no glyph exists for the current state on iOS ≥ 7
glyph-modern-on.pdf	Used on iOS ≥ 7 for FSSwitchStateOn state
glyph-modern-off.pdf	Used on iOS ≥ 7 for FSSwitchStateOff state
glyph-modern-indeterminate.pdf	Used on iOS ≥ 7 for FSSwitchStateIndeterminatestate

For common switches, you should make at least two icons, one for on state and one for off state. For button-like switches, glyph.pdf should suffice.

How to provide preferences

Main page: Dev:PreferenceLoader

Simple Approach

Add the following dictionary to your PreferenceLoader plist to make use of the Flipswitch preference bundle:

<dict>
	<key>cell</key>
	<string>PSLinkCell</string>
	<key>label</key>
	<string>Active Switches</string>
	<key>isController</key>
	<true/>
	<key>bundle</key>
	<string>FlipswitchSettings</string>
</dict>

Extra keys for optimal usage:

key	type	description
flipswitchTemplateBundle	string	Absolute path to a flipswitch template bundle.
flipswitchSettingsFile	string	Absolute file path to a settings file.
flipswitchPostNotification	string	Darwin notification string to be posted when a change happens.
flipswitchEnabledKey	string	Key for array of enabled switches.
flipswitchDisabledKey	string	Key for array of disabled switches.
flipswitchDefaultEnabled	array	Array of switch identifiers that are in the enabled section by default.
flipswitchDefaultDisabled	array	Array of switch identifiers that are in the disabled section by default.
flipswitchSettingsMode	string	Set to "enabling" for checkable cells or "reordering" for draggable cells between enabled and disabled sections.
flipswitchNewAreDisabled	BOOL	Switches not present previously in the settings file are added to the disabled switches array, if false, they are added to the enabled switches array.

How to make a template bundle

These bundles contain information about how a switch glyph (the image that the user sees for a given switch) is rendered when it is used in a button returned by the appropriate method of the FlipSwitch panel. Bundles contain an Info.plist file and optionally image files. Here is an example of an Info.plist, taken from SwitchIcons:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>English</string>
	<key>CFBundleIdentifier</key>
	<string>com.rpetrich.switchicon.icon-template</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundlePackageType</key>
	<string>BNDL</string>
	<key>CFBundleShortVersionString</key>
	<string>1.0.0</string>
	<key>CFBundleSignature</key>
	<string>????</string>
	<key>CFBundleVersion</key>
	<string>1.0</string>
	<key>DTPlatformName</key>
	<string>iphoneos</string>
	<key>MinimumOSVersion</key>
	<string>2.0</string>
	<key>width</key>
	<integer>59</integer>
	<key>height</key>
	<integer>60</integer>
	<key>layers</key>
	<array>
		<...>
	</array>
</dict>
</plist>

Keys not specified in the following table can use the same values as the example given.

key	type		meaning
CFBundleIdentifier	string		Template bundle identifier.
width	integer		Width of the icon.
height	integer		Height of the icon.
layers	array	... of dictionaries	Change visuals of switch glyph.

layers array can contain dictionaries with the following keys:

key	type	meaning	range of values	default value	depends
type	string	Layer type.	"image", "glyph"	-	-
opacity	float	Alpha value for current layer.	0.0 to 1.0	1.0	-
x	float	X value for offset position.	-	0.0	-
y	float	Y value for offset position.	-	0.0	-
fileName	string	Image filename without extension.	-	-	-
blur	float	Blur value for current layer.	0.0 to 1.0	0.0	type = "glyph"
size	float	Glyph size.	-	0	type = "glyph"
state	string	Switch state filter.	"on", "off", "indeterminate"	-	type = "glyph"
cutout	BOOL	Cutout mask flag.	-	NO	type = "glyph"
cutoutX	float	X offset for cutout mask.	-	0.0	type = "glyph" && cutout = YES
cutoutY	float	Y offset for cutout mask.	-	0.0	type = "glyph" && cutout = YES
cutoutBlur	float	Blur for cutout mask.	0.0 to 1.0	0.0	type = "glyph" && cutout = YES
color	string	Hex color for current layer.	"#000000" to "#FFFFFF"	"#000000"	type = "glyph" && filename = nil
blendMode	string	Blend mode for compositing layers.	CGBlendMode	kCGBlendModeNormal	type = "image"

layers are applied to the button one over the other.

If type is "image", the current layer will draw the image found in filename. Best use of this layer could be as a background.

If type is "glyph", the current layer will use the switch glyph as a mask. When state is present, the layer will select the glyph for said state. If cutout is true, the layer will be composed of only the glyph's borders.

It is possible to use a layer for each state by creating new layers arrays named layers-on, layers-off or layers-indeterminate.

The hex string in color is formatted #RRGGBB.

For more information on existing blend modes and their effects, see Apple's documentation .

How to show switches

The following code can be used to retrieve the full list of switches that FlipSwitch knows about:

NSBundle *templateBundle = [NSBundle bundleWithPath:@"/path/to/bundle.bundle"];
FSSwitchPanel *fsp = [FSSwitchPanel sharedPanel];
for (NSString *identifier in fsp.switchIdentifiers) {
	UIButton *button = [fsp buttonForSwitchIdentifier:identifier usingTemplate:templateBundle];
	// ... now you have a button with the style described by the template bundle that you can add to any view
}

To show the list of switches that the user set in the settings of your tweak, from your defaults plist in /var/mobile/Library/Preferences via creating an NSDictionary, using NSUserDefaults or CFPreferences... family functions, get the object for the key name set for flipswitchEnabledKey and use the code above replacing fsp.switchIdentifiers with the array you just got.

How to flip switches

To flip switches programmatically, you can use the shared instance of FSSwitchPanel.

	NSString *switchIdentifier = @"com.a3tweaks.switch.flashlight";
	FSSwitchPanel *fsp = [FSSwitchPanel sharedPanel];

	// Returns the current state of a particular switch
	FSSwitchState state = [fsp stateForSwitchIdentifier:switchIdentifier];

	// Updates the state of a particular switch. If the switch accepts the change it will send a state change
	[fsp setState:FSSwitchStateOn forSwitchIdentifier:switchIdentifier];

	// Applies the default action of a particular switch
	[fsp applyActionForSwitchIdentifier:switchIdentifier];

	// Queries whether a switch supports an alternate action. This is often triggered by a hold gesture
	BOOL b = [fsp hasAlternateActionForSwitchIdentifier:switchIdentifier];

	if (b) {
		// Apply the alternate action of a particular switch
		[fsp applyAlternateActionForSwitchIdentifier:switchIdentifier];
	}

Usage examples

• On-SpringBoard example usage, SwitchIcons
• Sample code of Toggle for tweak, SleipnizerFlipswitch
• NC widget using templates, showing switches and PreferenceLoader plist, FlipNC

External links

• Flipswitch source code