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--[[
ImGuiTheme.lua - Simple theming for the ReaImGui API
Initialize a new ImGuiTheme via `new` with a table containing (both optional):
- `colors`->(list table of { `colorKeyValueOrFunction`, `colorValue` })
- `styles`->(list table of { `styleKeyValueOrFunction`, `styleValue1` [, ...`styleValueN`] })
The Returned object contains the following methods to be used where you would have originally
called ImGui functions directly:
- `push(ctx)`: calls `ImGui_PushStyleColor` and `ImGui_PushStyleVar` for each color and style defined
- `pop(ctx)`: calls `ImGui_PopStyleColor` and `ImGui_PopStyleVar` with the correct `count` argument
]]--
ImGuiTheme = {
-- Override the calls to the associated REAPER API methods here
-- ...if you want to
f_color_push = nil,
f_color_pop = nil,
f_style_push = nil,
f_style_pop = nil,
}
ImGuiTheme.__index = ImGuiTheme
ImGuiTheme.new = function(theme_definition)
local theme = {
colors = ImGuiTheme.get_attribute_values(theme_definition.colors),
styles = ImGuiTheme.get_attribute_values(theme_definition.styles),
}
theme.color_count = #theme.colors
theme.style_count = #theme.styles
setmetatable(theme, ImGuiTheme)
theme:init()
return theme
end
function ImGuiTheme:init()
self.f_color_push = ImGuiTheme.get_function('f_color_push', reaper.ImGui_PushStyleColor)
self.f_color_pop = ImGuiTheme.get_function('f_color_pop', reaper.ImGui_PopStyleColor)
self.f_style_push = ImGuiTheme.get_function('f_style_push', reaper.ImGui_PushStyleVar)
self.f_style_pop = ImGuiTheme.get_function('f_style_pop', reaper.ImGui_PopStyleVar)
end
ImGuiTheme.get_attribute_values = function(raw_attributes)
raw_attributes = raw_attributes or {}
local attrs = {}
for _, v in ipairs(raw_attributes) do
if (type(v[1]) == "function") then
v[1] = v[1]()
end
table.insert(attrs, v)
end
return attrs
end
ImGuiTheme.get_function = function(key, default)
return ImGuiTheme[key] or default
end
function ImGuiTheme:push(ctx)
for i = 1, self.color_count do
self.f_color_push(ctx, self.colors[i][1], table.unpack(self.colors[i], 2))
end
for i = 1, self.style_count do
self.f_style_push(ctx, self.styles[i][1], table.unpack(self.styles[i], 2))
end
end
function ImGuiTheme:pop(ctx)
self.f_color_pop(ctx, self.color_count)
self.f_style_pop(ctx, self.style_count)
end
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