#111 Add druid.stencil_check for auto stencil check to call set_click_zone

README.md

@@ -63,6 +63,16 @@ If you don't need this behaviour, you can disable it by settings `druid.no_auto_
 no_auto_input = 1
 ```
 
+
+### Stencil check [optional]
+
+When creating input components inside stencil nodes, you probably will use `component:set_click_zone()` to restrict clicks outside this stencil zone.
+Druid can do it automatically on _late_init_ component step. To enable this feature add next field in your _game.project_ file
+```
+[druid]
+stencil_check = 1
+```
+
 ### Code [optional]
 
 Adjust **Druid** settings, if needed:

docs_md/02-creating_custom_components.md

@@ -23,7 +23,7 @@ end
 function M.update(self, dt)
 end
 
--- Call only if exist interest: component.ON_INPUT or component.ON_INPUT_HIGH
+-- Call only if exist interest: component.ON_INPUT
 function M.on_input(self, action_id, action)
 end
 
@@ -60,6 +60,10 @@ end
 function M.on_focus_gained(self)
 end
 
+-- Call only if exist interest: component.ON_LATE_INIT
+function M.on_late_init(self)
+end
+
 -- Call on component remove or on druid:final
 function M.on_remove(self)
 end
@@ -117,6 +121,8 @@ There is next interests in druid:
 
 - **ON_FOCUS_GAINED** will call _on_focust_gained_ function in on focus gained event. You need to pass window_callback to global `druid:on_window_callback`
 
+- **ON_LATE_INIT**  will call _on_late_init_ function once after component init on update step.
+
 ## Best practice on custom components
 On each component recommended describe component scheme in next way:
 

docs_md/changelog.md

@@ -237,4 +237,8 @@ Have a good day.
 			- `value` - optional field for several actions. For example value is text for **TEXT_SET**
 	- Add Druid component interest: `component.ON_MESSAGE_INPUT`
 	- Implement new interest via function `component:on_message_input(node_id, message)`
-	- See **System: Message input** example
+	- See **System: Message input** example
+- **#111**: Add autocheck for input and stencil nodes. To enable this feature, add `druid.stencil_check = 1` to your game.project file.
+	- Add `helper.get_closest_stencil_node` function to get closest parent non inverted stencil node
+	- Add `component.ON_LATE_INIT` interest. If component with with interest, it will call `component.on_late_init` function once after component init on update step. This can be used to do something after all gui components are was initialized and setup.
+	- This feature is using for auto setup `component:set_click_zone` to restrict clicks outside scrolls zone for example. Now you can don't think about click zone and let Druid do it instead of you!

druid/base/button.lua

@@ -57,7 +57,11 @@ local const = require("druid.const")
 local helper = require("druid.helper")
 local component = require("druid.component")
 
-local Button = component.create("button", { component.ON_INPUT, component.ON_MESSAGE_INPUT })
+local Button = component.create("button", {
+	component.ON_INPUT,
+	component.ON_MESSAGE_INPUT,
+	component.ON_LATE_INIT
+})
 
 
 local function is_input_match(self, action_id)
@@ -221,6 +225,16 @@ function Button.init(self, node, callback, params, anim_node)
 end
 
 
+function Button.on_late_init(self)
+	if not self.click_zone and const.IS_STENCIL_CHECK then
+		local stencil_node = helper.get_closest_stencil_node(self.node)
+		if stencil_node then
+			self:set_click_zone(stencil_node)
+		end
+	end
+end
+
+
 function Button.on_input(self, action_id, action)
 	if not is_input_match(self, action_id) then
 		return false

druid/base/drag.lua

@@ -51,7 +51,7 @@ local const = require("druid.const")
 local helper = require("druid.helper")
 local component = require("druid.component")
 
-local Drag = component.create("drag", { component.ON_INPUT }, const.PRIORITY_INPUT_HIGH)
+local Drag = component.create("drag", { component.ON_INPUT, component.ON_LATE_INIT }, const.PRIORITY_INPUT_HIGH)
 
 
 local function start_touch(self, touch)
@@ -189,6 +189,16 @@ function Drag.init(self, node, on_drag_callback)
 end
 
 
+function Drag.on_late_init(self)
+	if not self.click_zone and const.IS_STENCIL_CHECK then
+		local stencil_node = helper.get_closest_stencil_node(self.node)
+		if stencil_node then
+			self:set_click_zone(stencil_node)
+		end
+	end
+end
+
+
 function Drag.on_input_interrupt(self)
 	if self.is_drag or self.is_touch then
 		end_touch(self)

druid/base/hover.lua

@@ -18,7 +18,7 @@ local const = require("druid.const")
 local helper = require("druid.helper")
 local component = require("druid.component")
 
-local Hover = component.create("hover", { component.ON_INPUT })
+local Hover = component.create("hover", { component.ON_INPUT, component.ON_LATE_INIT })
 
 
 --- Component init function
@@ -38,6 +38,16 @@ function Hover.init(self, node, on_hover_callback)
 end
 
 
+function Hover.on_late_init(self)
+	if not self.click_zone and const.IS_STENCIL_CHECK then
+		local stencil_node = helper.get_closest_stencil_node(self.node)
+		if stencil_node then
+			self:set_click_zone(stencil_node)
+		end
+	end
+end
+
+
 function Hover.on_input(self, action_id, action)
 	if action_id ~= const.ACTION_TOUCH and action_id ~= nil then
 		return false

druid/base/scroll.lua

@@ -61,7 +61,12 @@ local const = require("druid.const")
 local helper = require("druid.helper")
 local component = require("druid.component")
 
-local Scroll = component.create("scroll", { component.ON_INPUT, component.ON_UPDATE, component.ON_LAYOUT_CHANGE })
+local Scroll = component.create("scroll", {
+	component.ON_INPUT,
+	component.ON_UPDATE,
+	component.ON_LAYOUT_CHANGE,
+	component.ON_LATE_INIT
+})
 
 
 local function inverse_lerp(min, max, current)
@@ -172,6 +177,16 @@ function Scroll.init(self, view_node, content_node)
 end
 
 
+function Scroll.on_late_init(self)
+	if not self.click_zone and const.IS_STENCIL_CHECK then
+		local stencil_node = helper.get_closest_stencil_node(self.node)
+		if stencil_node then
+			self:set_click_zone(stencil_node)
+		end
+	end
+end
+
+
 function Scroll.on_layout_change(self)
 	gui.set_position(self.content_node, self.position)
 end

druid/base/swipe.lua

@@ -23,7 +23,7 @@ local const = require("druid.const")
 local helper = require("druid.helper")
 local component = require("druid.component")
 
-local Swipe = component.create("swipe", { component.ON_INPUT })
+local Swipe = component.create("swipe", { component.ON_INPUT, component.ON_LATE_INIT })
 
 
 local function start_swipe(self, action)
@@ -99,6 +99,16 @@ function Swipe.init(self, node, on_swipe_callback)
 end
 
 
+function Swipe.on_late_init(self)
+	if not self.click_zone and const.IS_STENCIL_CHECK then
+		local stencil_node = helper.get_closest_stencil_node(self.node)
+		if stencil_node then
+			self:set_click_zone(stencil_node)
+		end
+	end
+end
+
+
 function Swipe.on_input(self, action_id, action)
 	if action_id ~= const.ACTION_TOUCH then
 		return false

druid/component.lua

@@ -18,6 +18,7 @@ BaseComponent.ALL = const.ALL
 BaseComponent.ON_INPUT = const.ON_INPUT
 BaseComponent.ON_UPDATE = const.ON_UPDATE
 BaseComponent.ON_MESSAGE = const.ON_MESSAGE
+BaseComponent.ON_LATE_INIT = const.ON_LATE_INIT
 BaseComponent.ON_FOCUS_LOST = const.ON_FOCUS_LOST
 BaseComponent.ON_FOCUS_GAINED = const.ON_FOCUS_GAINED
 BaseComponent.ON_LAYOUT_CHANGE = const.ON_LAYOUT_CHANGE
@@ -30,6 +31,7 @@ BaseComponent.ALL_INTERESTS = {
 	BaseComponent.ON_INPUT,
 	BaseComponent.ON_UPDATE,
 	BaseComponent.ON_MESSAGE,
+	BaseComponent.ON_LATE_INIT,
 	BaseComponent.ON_FOCUS_LOST,
 	BaseComponent.ON_FOCUS_GAINED,
 	BaseComponent.ON_LAYOUT_CHANGE,

druid/const.lua

@@ -21,6 +21,9 @@ M.ACTION_SCROLL_UP = hash(sys.get_config("druid.input_scroll_up", "scroll_up"))
 M.ACTION_SCROLL_DOWN = hash(sys.get_config("druid.input_scroll_down", "scroll_down"))
 
 
+M.IS_STENCIL_CHECK = sys.get_config("druid.stencil_check") == 1
+
+
 M.RELEASED = "released"
 M.PRESSED = "pressed"
 M.STRING = "string"
@@ -33,6 +36,7 @@ M.ALL = "all"
 M.ON_INPUT = hash("on_input")
 M.ON_UPDATE = hash("on_update")
 M.ON_MESSAGE = hash("on_message")
+M.ON_LATE_INIT = hash("on_late_init")
 M.ON_FOCUS_LOST = hash("on_focus_lost")
 M.ON_FOCUS_GAINED = hash("on_focus_gained")
 M.ON_LAYOUT_CHANGE = hash("layout_changed")

druid/helper.lua

@@ -171,6 +171,32 @@ function M.is_enabled(node)
 end
 
 
+
+--- Return closest non inverted clipping parent node for node
+-- @function helper.get_closest_stencil_node
+-- @tparam node node Gui node
+-- @treturn node|nil The clipping node
+function M.get_closest_stencil_node(node)
+	if not node then
+		return nil
+	end
+
+	local parent = gui.get_parent(node)
+	while parent do
+		local clipping_mode = gui.get_clipping_mode(parent)
+		local is_clipping_normal = not gui.get_clipping_inverted(parent)
+
+		if is_clipping_normal and clipping_mode == gui.CLIPPING_MODE_STENCIL then
+			return parent
+		end
+
+		parent = gui.get_parent(parent)
+	end
+
+	return nil
+end
+
+
 --- Get node offset for given gui pivot
 -- @function helper.get_pivot_offset
 -- @tparam gui.pivot pivot The node pivot

druid/system/druid_instance.lua

@@ -225,13 +225,7 @@ end
 function DruidInstance.create(self, component, ...)
 	helper.deprecated("The druid:create is deprecated. Please use druid:new instead")
 
-	local instance = create(self, component)
-
-	if instance.init then
-		instance:init(...)
-	end
-
-	return instance
+	return DruidInstance.new(self, component, ...)
 end
 
 
@@ -316,6 +310,12 @@ end
 -- @tparam DruidInstance self
 -- @tparam number dt Delta time
 function DruidInstance.update(self, dt)
+	local late_init_components = self.components[base_component.ON_LATE_INIT]
+	while late_init_components[1] do
+		late_init_components[1]:on_late_init()
+		table.remove(late_init_components, 1)
+	end
+
 	local components = self.components[base_component.ON_UPDATE]
 	for i = 1, #components do
 		components[i]:update(dt)

game.project

@@ -25,6 +25,7 @@ use_accelerometer = 0
 
 [druid]
 no_auto_input = 0
+stencil_check = 0
 input_text = text
 input_touch = touch
 input_marked_text = marked_text