diff options
Diffstat (limited to 'events_notdarwin.go')
| -rw-r--r-- | events_notdarwin.go | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/events_notdarwin.go b/events_notdarwin.go deleted file mode 100644 index 352151a..0000000 --- a/events_notdarwin.go +++ /dev/null @@ -1,152 +0,0 @@ -// +build !darwin -// Mac OS X uses its own set of position-independent key codes - -// 29 march 2014 - -package ui - -import ( - "image" -) - -/* -Windows and GTK+ have a limit of 2 and 3 clicks, respectively, natively supported. Fortunately, we can simulate the double/triple-click behavior to build higher-order clicks. We can use the same algorithm Windows uses on both: - http://blogs.msdn.com/b/oldnewthing/archive/2004/10/18/243925.aspx -For GTK+, we pull the double-click time and double-click distance, which work the same as the equivalents on Windows (so the distance is in all directions), from the GtkSettings system. - -On GTK+ this will also allow us to discard the GDK_BUTTON_2PRESS and GDK_BUTTON_3PRESS events, so the button press stream will be just like on other platforms. - -Thanks to mclasen, garnacho_, halfline, and tristan in irc.gimp.net/#gtk+. -*/ - -// the zero value is a reset clickCounter ready for use -// it doesn't matter that all the non-count fields are zero: the first click will fail the curButton test straightaway, so it'll return 1 and set the rest of the structure accordingly -type clickCounter struct { - curButton uint - rect image.Rectangle - prevTime uintptr - count uint -} - -// x, y, xdist, ydist, and c.rect must have the same units -// so must time, maxTime, and c.prevTime -func (c *clickCounter) click(button uint, x int, y int, time uintptr, maxTime uintptr, xdist int, ydist int) uint { - if button != c.curButton { // different button; start over - c.count = 0 - } - if !image.Pt(x, y).In(c.rect) { // not in the allowed region for a double-click; don't count - c.count = 0 - } - if (time - c.prevTime) > maxTime { // too slow; don't count - // note the above expression; time > (c.prevTime + maxTime) can overflow! - c.count = 0 - } - c.count++ // if either of the above ifs happened, this will make the click count 1; otherwise it will make the click count 2, 3, 4, 5, ... - - // now we need to update the internal structures for the next test - c.curButton = button - c.prevTime = time - c.rect = image.Rect(x-xdist, y-ydist, - x+xdist, y+ydist) - - return c.count -} - -// call this when losing focus, etc. -func (c *clickCounter) reset() { - c.count = 0 -} - -/* -For position independence across international keyboard layouts, typewriter keys are read using scancodes (which are always set 1). -Windows provides the scancodes directly in the LPARAM. -GTK+ provides the scancodes directly from the underlying window system via GdkEventKey.hardware_keycode. -On X11, this is scancode + 8 (because X11 keyboard codes have a range of [8,255]). -Wayland is guaranteed to give the same result (thanks ebassi in irc.gimp.net/#gtk+). -On Linux, where evdev is used instead of polling scancodes directly from the keyboard, evdev's typewriter section key code constants are the same as scancodes anyway, so the rules above apply. -Typewriter section scancodes are the same across international keyboards with some exceptions that have been accounted for (see KeyEvent's documentation); see http://www.quadibloc.com/comp/scan.htm for details. -Non-typewriter keys can be handled safely using constants provided by the respective backend API. - -Because GTK+ keysyms may or may not obey Num Lock, we also handle the 0-9 and . keys on the numeric keypad with scancodes (they match too). -*/ - -// use uintptr to be safe; the size of the scancode/hardware key code field on each platform is different -var scancodeKeys = map[uintptr]byte{ - 0x02: '1', - 0x03: '2', - 0x04: '3', - 0x05: '4', - 0x06: '5', - 0x07: '6', - 0x08: '7', - 0x09: '8', - 0x0A: '9', - 0x0B: '0', - 0x0C: '-', - 0x0D: '=', - 0x0E: '\b', - 0x0F: '\t', - 0x10: 'q', - 0x11: 'w', - 0x12: 'e', - 0x13: 'r', - 0x14: 't', - 0x15: 'y', - 0x16: 'u', - 0x17: 'i', - 0x18: 'o', - 0x19: 'p', - 0x1A: '[', - 0x1B: ']', - 0x1C: '\n', - 0x1E: 'a', - 0x1F: 's', - 0x20: 'd', - 0x21: 'f', - 0x22: 'g', - 0x23: 'h', - 0x24: 'j', - 0x25: 'k', - 0x26: 'l', - 0x27: ';', - 0x28: '\'', - 0x29: '`', - 0x2B: '\\', - 0x2C: 'z', - 0x2D: 'x', - 0x2E: 'c', - 0x2F: 'v', - 0x30: 'b', - 0x31: 'n', - 0x32: 'm', - 0x33: ',', - 0x34: '.', - 0x35: '/', - 0x39: ' ', -} - -var scancodeExtKeys = map[uintptr]ExtKey{ - 0x47: N7, - 0x48: N8, - 0x49: N9, - 0x4B: N4, - 0x4C: N5, - 0x4D: N6, - 0x4F: N1, - 0x50: N2, - 0x51: N3, - 0x52: N0, - 0x53: NDot, -} - -func fromScancode(scancode uintptr) (ke KeyEvent, ok bool) { - if key, ok := scancodeKeys[scancode]; ok { - ke.Key = key - return ke, true - } - if extkey, ok := scancodeExtKeys[scancode]; ok { - ke.ExtKey = extkey - return ke, true - } - return ke, false -} |