canvas%

A canvas% object is a general-purpose window for drawing and handling events.

• (make-object canvas% parent style) -> canvas% object
      parent : frame%, dialog%, panel%, or pane% object
      style = null : list of symbols in '(border vscroll hscroll)

  The style argument indicates one or more of the following syles:

  • 'border -- gives the canvas a thin border
  • 'hscroll -- enables horizontal scrolling (initially inactive)
  • 'vscroll -- enables vertical scrolling (initially inactive)

  The 'hscroll and 'vscroll styles create a canvas with an initially inactive scrollbar. The scrollbar is activated with either init-manual-scrollbars or init-auto-scrollbars.

  
  

• accept-tab-focus
• get-dc
• get-scroll-page
• get-scroll-pos
• get-scroll-range
• get-view-start
• get-virtual-size
• init-auto-scrollbars
• init-manual-scrollbars
• min-client-height
• min-client-width
• on-char
• on-event
• on-paint
• on-scroll
• on-tab-in
• popup-menu
• scroll
• set-scroll-page
• set-scroll-pos
• set-scroll-range
• warp-pointer

• accept-drop-files from window<%>
• accept-tab-focus from canvas%
• client->screen from window<%>
• enable from window<%>
• focus from window<%>
• get-client-size from window<%>
• get-cursor from window<%>
• get-dc from canvas<%>
• get-graphical-min-size from area<%>
• get-height from window<%>
• get-label from window<%>
• get-parent from area<%>
• get-plain-label from window<%>
• get-scroll-page from canvas%
• get-scroll-pos from canvas%
• get-scroll-range from canvas%
• get-size from window<%>
• get-top-level-window from area<%>
• get-view-start from canvas%
• get-virtual-size from canvas%
• get-width from window<%>
• get-x from window<%>
• get-y from window<%>
• has-focus? from window<%>
• horiz-margin from subarea<%>
• init-auto-scrollbars from canvas%
• init-manual-scrollbars from canvas%
• is-enabled? from window<%>
• is-shown? from window<%>
• min-client-height from canvas<%>
• min-client-width from canvas<%>
• min-height from area<%>
• min-width from area<%>
• on-char from canvas<%>
• on-drop-file from window<%>
• on-event from canvas<%>
• on-focus from window<%>
• on-move from window<%>
• on-paint from canvas<%>
• on-scroll from canvas<%>
• on-size from window<%>
• on-subwindow-char from window<%>
• on-subwindow-event from window<%>
• on-tab-in from canvas<%>
• popup-menu from canvas<%>
• refresh from window<%>
• screen->client from window<%>
• scroll from canvas%
• set-cursor from window<%>
• set-label from window<%>
• set-scroll-page from canvas%
• set-scroll-pos from canvas%
• set-scroll-range from canvas%
• show from window<%>
• stretchable-height from area<%>
• stretchable-width from area<%>
• vert-margin from subarea<%>
• warp-pointer from canvas<%>