204 lines
7.8 KiB
Ruby
204 lines
7.8 KiB
Ruby
#==============================================================================
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# ** Window_Selectable
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#------------------------------------------------------------------------------
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# This window class contains cursor movement and scroll functions.
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#==============================================================================
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class Window_Selectable < Window_Base
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#--------------------------------------------------------------------------
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# * Public Instance Variables
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#--------------------------------------------------------------------------
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attr_reader :index # cursor position
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attr_reader :help_window # help window
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#--------------------------------------------------------------------------
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# * Object Initialization
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# x : window x-coordinate
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# y : window y-coordinate
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# width : window width
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# height : window height
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#--------------------------------------------------------------------------
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def initialize(x, y, width, height)
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super(x, y, width, height)
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@item_max = 1
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@column_max = 1
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@index = -1
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end
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#--------------------------------------------------------------------------
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# * Set Cursor Position
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# index : new cursor position
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#--------------------------------------------------------------------------
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def index=(index)
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@index = index
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# Update Help Text (update_help is defined by the subclasses)
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if self.active and @help_window != nil
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update_help
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end
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# Update cursor rectangle
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update_cursor_rect
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end
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#--------------------------------------------------------------------------
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# * Get Row Count
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#--------------------------------------------------------------------------
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def row_max
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# Compute rows from number of items and columns
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return (@item_max + @column_max - 1) / @column_max
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end
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#--------------------------------------------------------------------------
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# * Get Top Row
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#--------------------------------------------------------------------------
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def top_row
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# Divide y-coordinate of window contents transfer origin by 1 row
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# height of 32
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return self.oy / 32
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end
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#--------------------------------------------------------------------------
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# * Set Top Row
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# row : row shown on top
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#--------------------------------------------------------------------------
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def top_row=(row)
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# If row is less than 0, change it to 0
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if row < 0
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row = 0
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end
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# If row exceeds row_max - 1, change it to row_max - 1
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if row > row_max - 1
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row = row_max - 1
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end
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# Multiply 1 row height by 32 for y-coordinate of window contents
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# transfer origin
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self.oy = row * 32
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end
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#--------------------------------------------------------------------------
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# * Get Number of Rows Displayable on 1 Page
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#--------------------------------------------------------------------------
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def page_row_max
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# Subtract a frame height of 32 from the window height, and divide it by
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# 1 row height of 32
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return (self.height - 32) / 32
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end
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#--------------------------------------------------------------------------
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# * Get Number of Items Displayable on 1 Page
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#--------------------------------------------------------------------------
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def page_item_max
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# Multiply row count (page_row_max) times column count (@column_max)
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return page_row_max * @column_max
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end
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#--------------------------------------------------------------------------
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# * Set Help Window
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# help_window : new help window
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#--------------------------------------------------------------------------
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def help_window=(help_window)
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@help_window = help_window
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# Update help text (update_help is defined by the subclasses)
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if self.active and @help_window != nil
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update_help
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end
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end
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#--------------------------------------------------------------------------
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# * Update Cursor Rectangle
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#--------------------------------------------------------------------------
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def update_cursor_rect
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# If cursor position is less than 0
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if @index < 0
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self.cursor_rect.empty
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return
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end
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# Get current row
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row = @index / @column_max
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# If current row is before top row
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if row < self.top_row
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# Scroll so that current row becomes top row
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self.top_row = row
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end
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# If current row is more to back than back row
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if row > self.top_row + (self.page_row_max - 1)
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# Scroll so that current row becomes back row
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self.top_row = row - (self.page_row_max - 1)
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end
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# Calculate cursor width
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cursor_width = self.width / @column_max - 32
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# Calculate cursor coordinates
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x = @index % @column_max * (cursor_width + 32)
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y = @index / @column_max * 32 - self.oy
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# Update cursor rectangle
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self.cursor_rect.set(x, y, cursor_width, 32)
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end
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#--------------------------------------------------------------------------
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# * Frame Update
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#--------------------------------------------------------------------------
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def update
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super
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# If cursor is movable
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if self.active and @item_max > 0 and @index >= 0
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# If pressing down on the directional buttons
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if Input.repeat?(Input::DOWN)
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# If column count is 1 and directional button was pressed down with no
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# repeat, or if cursor position is more to the front than
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# (item count - column count)
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if (@column_max == 1 and Input.trigger?(Input::DOWN)) or
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@index < @item_max - @column_max
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# Move cursor down
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$game_system.se_play($data_system.cursor_se)
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@index = (@index + @column_max) % @item_max
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end
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end
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# If the up directional button was pressed
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if Input.repeat?(Input::UP)
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# If column count is 1 and directional button was pressed up with no
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# repeat, or if cursor position is more to the back than column count
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if (@column_max == 1 and Input.trigger?(Input::UP)) or
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@index >= @column_max
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# Move cursor up
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$game_system.se_play($data_system.cursor_se)
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@index = (@index - @column_max + @item_max) % @item_max
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end
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end
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# If the right directional button was pressed
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if Input.repeat?(Input::RIGHT)
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# If column count is 2 or more, and cursor position is closer to front
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# than (item count -1)
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if @column_max >= 2 and @index < @item_max - 1
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# Move cursor right
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$game_system.se_play($data_system.cursor_se)
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@index += 1
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end
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end
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# If the left directional button was pressed
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if Input.repeat?(Input::LEFT)
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# If column count is 2 or more, and cursor position is more back than 0
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if @column_max >= 2 and @index > 0
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# Move cursor left
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$game_system.se_play($data_system.cursor_se)
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@index -= 1
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end
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end
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# If R button was pressed
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if Input.repeat?(Input::R)
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# If bottom row being displayed is more to front than bottom data row
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if self.top_row + (self.page_row_max - 1) < (self.row_max - 1)
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# Move cursor 1 page back
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$game_system.se_play($data_system.cursor_se)
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@index = [@index + self.page_item_max, @item_max - 1].min
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self.top_row += self.page_row_max
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end
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end
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# If L button was pressed
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if Input.repeat?(Input::L)
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# If top row being displayed is more to back than 0
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if self.top_row > 0
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# Move cursor 1 page forward
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$game_system.se_play($data_system.cursor_se)
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@index = [@index - self.page_item_max, 0].max
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self.top_row -= self.page_row_max
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end
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end
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end
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# Update help text (update_help is defined by the subclasses)
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if self.active and @help_window != nil
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update_help
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end
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# Update cursor rectangle
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update_cursor_rect
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end
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end
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