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path: root/builtin/mainmenu/tab_settings.lua
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--Minetest
--Copyright (C) 2013 sapier
--
--This program is free software; you can redistribute it and/or modify
--it under the terms of the GNU Lesser General Public License as published by
--the Free Software Foundation; either version 2.1 of the License, or
--(at your option) any later version.
--
--This program is distributed in the hope that it will be useful,
--but WITHOUT ANY WARRANTY; without even the implied warranty of
--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--GNU Lesser General Public License for more details.
--
--You should have received a copy of the GNU Lesser General Public License along
--with this program; if not, write to the Free Software Foundation, Inc.,
--51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

--------------------------------------------------------------------------------

local dd_filter_labels = {
	fgettext("No Filter"),
	fgettext("Bilinear Filter"),
	fgettext("Trilinear Filter")
}

local filters = {
	{dd_filter_labels[1]..","..dd_filter_labels[2]..","..dd_filter_labels[3]},
	{"", "bilinear_filter", "trilinear_filter"},
}

local dd_mipmap_labels = {
	fgettext("No Mipmap"),
	fgettext("Mipmap"),
	fgettext("Mipmap + Aniso. Filter")
}

local mipmap = {
	{dd_mipmap_labels[1]..","..dd_mipmap_labels[2]..","..dd_mipmap_labels[3]},
	{"", "mip_map", "anisotropic_filter"},
}

local function getFilterSettingIndex()
	if (core.setting_get(filters[2][3]) == "true") then
		return 3
	end
	if (core.setting_get(filters[2][3]) == "false" and core.setting_get(filters[2][2]) == "true") then
		return 2
	end
	return 1
end

local function getMipmapSettingIndex()
	if (core.setting_get(mipmap[2][3]) == "true") then
		return 3
	end
	if (core.setting_get(mipmap[2][3]) == "false" and core.setting_get(mipmap[2][2]) == "true") then
		return 2
	end
	return 1
end

local function video_driver_fname_to_name(selected_driver)
	local video_drivers = core.get_video_drivers()

	for i=1, #video_drivers do
		if selected_driver == video_drivers[i].friendly_name then
			return video_drivers[i].name:lower()
		end
	end

	return ""
end

local function dlg_confirm_reset_formspec(data)
	local retval =
		"size[8,3]" ..
		"label[1,1;".. fgettext("Are you sure to reset your singleplayer world?") .. "]"..
		"button[1,2;2.6,0.5;dlg_reset_singleplayer_confirm;"..
				fgettext("Yes") .. "]" ..
		"button[4,2;2.8,0.5;dlg_reset_singleplayer_cancel;"..
				fgettext("No!!!") .. "]"
	return retval
end

local function dlg_confirm_reset_btnhandler(this, fields, dialogdata)

	if fields["dlg_reset_singleplayer_confirm"] ~= nil then
		local worldlist = core.get_worlds()
		local found_singleplayerworld = false

		for i=1,#worldlist,1 do
			if worldlist[i].name == "singleplayerworld" then
				found_singleplayerworld = true
				gamedata.worldindex = i
			end
		end

		if found_singleplayerworld then
			core.delete_world(gamedata.worldindex)
		end

		core.create_world("singleplayerworld", 1)

		worldlist = core.get_worlds()

		found_singleplayerworld = false

		for i=1,#worldlist,1 do
			if worldlist[i].name == "singleplayerworld" then
				found_singleplayerworld = true
				gamedata.worldindex = i
			end
		end
	end

	this.parent:show()
	this:hide()
	this:delete()
	return true
end

local function showconfirm_reset(tabview)
	local new_dlg = dialog_create("reset_spworld",
		dlg_confirm_reset_formspec,
		dlg_confirm_reset_btnhandler,
		nil)
	new_dlg:set_parent(tabview)
	tabview:hide()
	new_dlg:show()
end

local function gui_scale_to_scrollbar()
	local current_value = tonumber(core.setting_get("gui_scaling"))

	if (current_value == nil) or current_value < 0.25 then
		return 0
	end
	if current_value <= 1.25 then
		return ((current_value - 0.25)/ 1.0) * 700
	end
	if current_value <= 6 then
		return ((current_value -1.25) * 100) + 700
	end

	return 1000
end

local function scrollbar_to_gui_scale(value)
	value = tonumber(value)

	if (value <= 700) then
		return ((value / 700) * 1.0) + 0.25
	end
	if (value <=1000) then
		return ((value - 700) / 100) + 1.25
	end

	return 1
end

local function formspec(tabview, name, tabdata)
	local video_drivers = core.get_video_drivers()
	local current_video_driver = core.setting_get("video_driver"):lower()

	local driver_formspec_string = ""
	local driver_current_idx = 0

	for i=2, #video_drivers do
		driver_formspec_string = driver_formspec_string .. video_drivers[i].friendly_name
		if i ~= #video_drivers then
			driver_formspec_string = driver_formspec_string .. ","
		end

		if current_video_driver == video_drivers[i].name:lower() then
			driver_current_idx = i - 1
		end
	end

	local tab_string =
		"box[0,0;3.5,3.9;#999999]" ..
		"checkbox[0.25,0;cb_smooth_lighting;".. fgettext("Smooth Lighting")
				.. ";".. dump(core.setting_getbool("smooth_lighting")) .. "]"..
		"checkbox[0.25,0.5;cb_particles;".. fgettext("Enable Particles") .. ";"
				.. dump(core.setting_getbool("enable_particles"))	.. "]"..
		"checkbox[0.25,1;cb_3d_clouds;".. fgettext("3D Clouds") .. ";"
				.. dump(core.setting_getbool("enable_3d_clouds")) .. "]"..
		"checkbox[0.25,1.5;cb_fancy_trees;".. fgettext("Fancy Trees") .. ";"
				.. dump(core.setting_getbool("new_style_leaves")) .. "]"..
		"checkbox[0.25,2.0;cb_opaque_water;".. fgettext("Opaque Water") .. ";"
				.. dump(core.setting_getbool("opaque_water")) .. "]"..
		"checkbox[0.25,2.5;cb_connected_glass;".. fgettext("Connected Glass") .. ";"
				.. dump(core.setting_getbool("connected_glass"))	.. "]"..
		"checkbox[0.25,3.0;cb_node_highlighting;".. fgettext("Node Highlighting") .. ";"
				.. dump(core.setting_getbool("enable_node_highlighting")) .. "]"..
		"box[3.75,0;3.75,3.45;#999999]" ..
		"label[3.85,0.1;".. fgettext("Texturing:") .. "]"..
		"dropdown[3.85,0.55;3.85;dd_filters;" .. filters[1][1] .. ";"
				.. getFilterSettingIndex() .. "]" ..
		"dropdown[3.85,1.35;3.85;dd_mipmap;" .. mipmap[1][1] .. ";"
				.. getMipmapSettingIndex() .. "]" ..
		"label[3.85,2.15;".. fgettext("Rendering:") .. "]"..
		"dropdown[3.85,2.6;3.85;dd_video_driver;"
				.. driver_formspec_string .. ";" .. driver_current_idx .. "]" ..
		"tooltip[dd_video_driver;" ..
				fgettext("Restart minetest for driver change to take effect") .. "]" ..
		"box[7.75,0;4,4;#999999]" ..
		"checkbox[8,0;cb_shaders;".. fgettext("Shaders") .. ";"
				.. dump(core.setting_getbool("enable_shaders")) .. "]"

	if PLATFORM ~= "Android" then
		tab_string = tab_string ..
		"button[8,4.75;3.75,0.5;btn_change_keys;".. fgettext("Change keys") .. "]"
	else
		tab_string = tab_string ..
		"button[8,4.75;3.75,0.5;btn_reset_singleplayer;".. fgettext("Reset singleplayer world") .. "]"
	end
	tab_string = tab_string ..
		"box[0,4.25;3.5,1.1;#999999]" ..
		"label[0.25,4.25;" .. fgettext("GUI scale factor") .. "]" ..
		"scrollbar[0.25,4.75;3,0.4;sb_gui_scaling;horizontal;" ..
		 gui_scale_to_scrollbar() .. "]" ..
		"tooltip[sb_gui_scaling;" ..
			fgettext("Scaling factor applied to menu elements: ") ..
			dump(core.setting_get("gui_scaling")) .. "]"

	if PLATFORM == "Android" then
		tab_string = tab_string ..
		"box[3.75,3.55;3.75,1.8;#999999]" ..
		"checkbox[3.9,3.45;cb_touchscreen_target;".. fgettext("Touch free target") .. ";"
				.. dump(core.setting_getbool("touchtarget")) .. "]"
	end

	if core.setting_get("touchscreen_threshold") ~= nil then
		tab_string = tab_string ..
				"label[4.3,4.1;" .. fgettext("Touchthreshold (px)") .. "]" ..
				"dropdown[3.85,4.55;3.85;dd_touchthreshold;0,10,20,30,40,50;" ..
				((tonumber(core.setting_get("touchscreen_threshold"))/10)+1) .. "]"
	end

	if core.setting_getbool("enable_shaders") then
		tab_string = tab_string ..
				"checkbox[8,0.5;cb_bumpmapping;".. fgettext("Bumpmapping") .. ";"
						.. dump(core.setting_getbool("enable_bumpmapping")) .. "]"..
				"checkbox[8,1.0;cb_generate_normalmaps;".. fgettext("Generate Normalmaps") .. ";"
						.. dump(core.setting_getbool("generate_normalmaps")) .. "]"..
				"checkbox[8,1.5;cb_parallax;".. fgettext("Parallax Occlusion") .. ";"
						.. dump(core.setting_getbool("enable_parallax_occlusion")) .. "]"..
				"checkbox[8,2.0;cb_waving_water;".. fgettext("Waving Water") .. ";"
						.. dump(core.setting_getbool("enable_waving_water")) .. "]"..
				"checkbox[8,2.5;cb_waving_leaves;".. fgettext("Waving Leaves") .. ";"
						.. dump(core.setting_getbool("enable_waving_leaves")) .. "]"..
				"checkbox[8,3.0;cb_waving_plants;".. fgettext("Waving Plants") .. ";"
						.. dump(core.setting_getbool("enable_waving_plants")) .. "]"
	else
		tab_string = tab_string ..
				"textlist[8.33,0.7;4,1;;#888888" .. fgettext("Bumpmapping") .. ";0;true]" ..
				"textlist[8.33,1.2;4,1;;#888888" .. fgettext("Generate Normalmaps") .. ";0;true]" ..
				"textlist[8.33,1.7;4,1;;#888888" .. fgettext("Parallax Occlusion") .. ";0;true]" ..
				"textlist[8.33,2.2;4,1;;#888888" .. fgettext("Waving Water") .. ";0;true]" ..
				"textlist[8.33,2.7;4,1;;#888888" .. fgettext("Waving Leaves") .. ";0;true]" ..
				"textlist[8.33,3.2;4,1;;#888888" .. fgettext("Waving Plants") .. ";0;true]"
		end
	return tab_string
end

--------------------------------------------------------------------------------
local function handle_settings_buttons(this, fields, tabname, tabdata)
	if fields["cb_fancy_trees"] then
		core.setting_set("new_style_leaves", fields["cb_fancy_trees"])
		return true
	end
	if fields["cb_smooth_lighting"] then
		core.setting_set("smooth_lighting", fields["cb_smooth_lighting"])
		return true
	end
	if fields["cb_3d_clouds"] then
		core.setting_set("enable_3d_clouds", fields["cb_3d_clouds"])
		return true
	end
	if fields["cb_opaque_water"] then
		core.setting_set("opaque_water", fields["cb_opaque_water"])
		return true
	end
	if fields["cb_shaders"] then
		if (core.setting_get("video_driver") == "direct3d8" or core.setting_get("video_driver") == "direct3d9") then
			core.setting_set("enable_shaders", "false")
			gamedata.errormessage = fgettext("To enable shaders the OpenGL driver needs to be used.")
		else
			core.setting_set("enable_shaders", fields["cb_shaders"])
		end
		return true
	end
	if fields["cb_connected_glass"] then
		core.setting_set("connected_glass", fields["cb_connected_glass"])
		return true
	end
	if fields["cb_node_highlighting"] then
		core.setting_set("enable_node_highlighting", fields["cb_node_highlighting"])
		return true
	end
	if fields["cb_particles"] then
		core.setting_set("enable_particles", fields["cb_particles"])
		return true
	end
	if fields["cb_bumpmapping"] then
		core.setting_set("enable_bumpmapping", fields["cb_bumpmapping"])
	end
	if fields["cb_generate_normalmaps"] then
		core.setting_set("generate_normalmaps", fields["cb_generate_normalmaps"])
	end
	if fields["cb_parallax"] then
		core.setting_set("enable_parallax_occlusion", fields["cb_parallax"])
		return true
	end
	if fields["cb_waving_water"] then
		core.setting_set("enable_waving_water", fields["cb_waving_water"])
		return true
	end
	if fields["cb_waving_leaves"] then
		core.setting_set("enable_waving_leaves", fields["cb_waving_leaves"])
	end
	if fields["cb_waving_plants"] then
		core.setting_set("enable_waving_plants", fields["cb_waving_plants"])
		return true
	end
	if fields["btn_change_keys"] ~= nil then
		core.show_keys_menu()
		return true
	end

	if fields["sb_gui_scaling"] then
		local event = core.explode_scrollbar_event(fields["sb_gui_scaling"])

		if event.type == "CHG" then
			local tosave = string.format("%.2f",scrollbar_to_gui_scale(event.value))
			core.setting_set("gui_scaling",tosave)
			return true
		end
	end
	if fields["cb_touchscreen_target"] then
		core.setting_set("touchtarget", fields["cb_touchscreen_target"])
		return true
	end
	if fields["btn_reset_singleplayer"] then
		showconfirm_reset(this)
		return true
	end

	--Note dropdowns have to be handled LAST!
	local ddhandled = false

	if fields["dd_touchthreshold"] then
		core.setting_set("touchscreen_threshold",fields["dd_touchthreshold"])
		ddhandled = true
	end

	if fields["dd_video_driver"] then
		core.setting_set("video_driver",
			video_driver_fname_to_name(fields["dd_video_driver"]))
		ddhandled = true
	end
	if fields["dd_filters"] == dd_filter_labels[1] then
		core.setting_set("bilinear_filter", "false")
		core.setting_set("trilinear_filter", "false")
		ddhandled = true
	end
	if fields["dd_filters"] == dd_filter_labels[2] then
		core.setting_set("bilinear_filter", "true")
		core.setting_set("trilinear_filter", "false")
		ddhandled = true
	end
	if fields["dd_filters"] == dd_filter_labels[3] then
		core.setting_set("bilinear_filter", "false")
		core.setting_set("trilinear_filter", "true")
		ddhandled = true
	end
	if fields["dd_mipmap"] == dd_mipmap_labels[1] then
		core.setting_set("mip_map", "false")
		core.setting_set("anisotropic_filter", "false")
		ddhandled = true
	end
	if fields["dd_mipmap"] == dd_mipmap_labels[2] then
		core.setting_set("mip_map", "true")
		core.setting_set("anisotropic_filter", "false")
		ddhandled = true
	end
	if fields["dd_mipmap"] == dd_mipmap_labels[3] then
		core.setting_set("mip_map", "true")
		core.setting_set("anisotropic_filter", "true")
		ddhandled = true
	end

	return ddhandled
end

tab_settings = {
	name = "settings",
	caption = fgettext("Settings"),
	cbf_formspec = formspec,
	cbf_button_handler = handle_settings_buttons
}