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Android: Replace movement buttons with joystick (#7126)

* Android: Replace movement buttons with joystick

Replace movement control buttons (arrows at bottom left screen) with virtual joystick.
Joystick has 8 directions (same as keyboard). Basically, just map it to keyboard input.
Joystick applies only on left 1/3 of screen.
Joystick's position can be fixed by enabling fixed_virtual_joystick setting.
Three new images:
(1) placeholder joystick,
(2) joystick container (background), and
(3) joystick cursor.
Remove unused images: movement control buttons (*_arrow.png).
New data type: touch_gui_joystick_move_id

Joystick's fixed position is spaced one button size from bottom and from left of screen.
Remove unused variable: m_joystick_downlocation
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srifqi authored and SmallJoker committed Apr 10, 2018
1 parent 22ebbe1 commit 326eeca306f7bfb53ae3685eef18978dd81e587e
@@ -118,6 +118,13 @@ random_input (Random input) bool false
# Continuous forward movement, toggled by autoforward key.
continuous_forward (Continuous forward) bool false

# The length in pixels it takes for touch screen interaction to start.
touchscreen_threshold (Touch screen threshold) int 20 0 100

# (Android) Fixes the position of virtual joystick.
# If disabled, virtual joystick will center to first-touch's position.
fixed_virtual_joystick (Fixed virtual joystick) bool false

# Enable joysticks
enable_joysticks (Enable joysticks) bool false

@@ -86,6 +86,15 @@
# type: bool
# continuous_forward = false

# The length in pixels it takes for touch screen interaction to start.
# type: int
# touchscreen_threshold = 20

# (Android) Fixes the position of virtual joystick.
# If disabled, virtual joystick will center to first-touch's position.
# type: int
# fixed_virtual_joystick = false

# Enable Joysticks
# type: bool
# enable_joysticks = false
@@ -408,6 +408,7 @@ void set_default_settings(Settings *settings)
settings->setDefault("touchtarget", "true");
settings->setDefault("TMPFolder","/sdcard/" PROJECT_NAME_C "/tmp/");
settings->setDefault("touchscreen_threshold","20");
settings->setDefault("fixed_virtual_joystick", "false");
settings->setDefault("smooth_lighting", "false");
settings->setDefault("max_simultaneous_block_sends_per_client", "3");
settings->setDefault("emergequeue_limit_diskonly", "8");
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