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app: implement key.Event for Linux desktops #52

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app: implement key.Event for Linux desktops #52

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20 changes: 18 additions & 2 deletions app/x11.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
#include "_cgo_export.h"
#include <EGL/egl.h>
#include <GLES2/gl2.h>
#include <X11/Xlib.h>
#include <X11/XKBlib.h>
#include <stdio.h>
#include <stdlib.h>

Expand Down Expand Up @@ -37,6 +37,8 @@ new_window(Display *x_dpy, EGLDisplay e_dpy, int w, int h, EGLContext *ctx, EGLS
exit(1);
}

XkbSetDetectableAutoRepeat(x_dpy, True, NULL);

XVisualInfo visTemplate;
visTemplate.visualid = vid;
int num_visuals;
Expand All @@ -56,7 +58,8 @@ new_window(Display *x_dpy, EGLDisplay e_dpy, int w, int h, EGLContext *ctx, EGLS
}

attr.event_mask = StructureNotifyMask | ExposureMask |
ButtonPressMask | ButtonReleaseMask | ButtonMotionMask;
ButtonPressMask | ButtonReleaseMask | ButtonMotionMask |
KeyPressMask | KeyReleaseMask;
Window win = XCreateWindow(
x_dpy, root, 0, 0, w, h, 0, visInfo->depth, InputOutput,
visInfo->visual, CWColormap | CWEventMask, &attr);
Expand Down Expand Up @@ -87,6 +90,7 @@ new_window(Display *x_dpy, EGLDisplay e_dpy, int w, int h, EGLContext *ctx, EGLS
}

Display *x_dpy;
XIC x_ic;
EGLDisplay e_dpy;
EGLContext e_ctx;
EGLSurface e_surf;
Expand Down Expand Up @@ -123,6 +127,14 @@ createWindow(void) {
exit(1);
}

XIM xim = XOpenIM(x_dpy, 0, 0, 0);

x_ic = XCreateIC(xim,
XNInputStyle, XIMPreeditNothing | XIMStatusNothing,
XNClientWindow, win,
XNFocusWindow, win,
NULL);

// Window size and DPI should be initialized before starting app.
XEvent ev;
while (1) {
Expand Down Expand Up @@ -160,6 +172,10 @@ processEvents(void) {
return;
}
break;
case KeyPress:
case KeyRelease:
onKeyEvent(&ev.xkey);
break;
}
}
}
Expand Down
203 changes: 203 additions & 0 deletions app/x11.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,11 @@ than screens with touch panels.
/*
#cgo LDFLAGS: -lEGL -lGLESv2 -lX11

#include <X11/Xlib.h>
#include <X11/keysym.h>

extern XIC x_ic;

void createWindow(void);
void processEvents(void);
void swapBuffers(void);
Expand All @@ -24,6 +29,7 @@ import (
"runtime"
"time"

"golang.org/x/mobile/event/key"
"golang.org/x/mobile/event/lifecycle"
"golang.org/x/mobile/event/paint"
"golang.org/x/mobile/event/size"
Expand Down Expand Up @@ -109,6 +115,203 @@ func onTouchMove(x, y float32) { sendTouch(touch.TypeMove, x, y) }
//export onTouchEnd
func onTouchEnd(x, y float32) { sendTouch(touch.TypeEnd, x, y) }

var keyMap = map[C.KeySym]key.Code{
C.XK_a: key.CodeA,
C.XK_b: key.CodeB,
C.XK_c: key.CodeC,
C.XK_d: key.CodeD,
C.XK_e: key.CodeE,
C.XK_f: key.CodeF,
C.XK_g: key.CodeG,
C.XK_h: key.CodeH,
C.XK_i: key.CodeI,
C.XK_j: key.CodeJ,
C.XK_k: key.CodeK,
C.XK_l: key.CodeL,
C.XK_m: key.CodeM,
C.XK_n: key.CodeN,
C.XK_o: key.CodeO,
C.XK_p: key.CodeP,
C.XK_q: key.CodeQ,
C.XK_r: key.CodeR,
C.XK_s: key.CodeS,
C.XK_t: key.CodeT,
C.XK_u: key.CodeU,
C.XK_v: key.CodeV,
C.XK_w: key.CodeW,
C.XK_x: key.CodeX,
C.XK_y: key.CodeY,
C.XK_z: key.CodeZ,
C.XK_A: key.CodeA,
C.XK_B: key.CodeB,
C.XK_C: key.CodeC,
C.XK_D: key.CodeD,
C.XK_E: key.CodeE,
C.XK_F: key.CodeF,
C.XK_G: key.CodeG,
C.XK_H: key.CodeH,
C.XK_I: key.CodeI,
C.XK_J: key.CodeJ,
C.XK_K: key.CodeK,
C.XK_L: key.CodeL,
C.XK_M: key.CodeM,
C.XK_N: key.CodeN,
C.XK_O: key.CodeO,
C.XK_P: key.CodeP,
C.XK_Q: key.CodeQ,
C.XK_R: key.CodeR,
C.XK_S: key.CodeS,
C.XK_T: key.CodeT,
C.XK_U: key.CodeU,
C.XK_V: key.CodeV,
C.XK_W: key.CodeW,
C.XK_X: key.CodeX,
C.XK_Y: key.CodeY,
C.XK_Z: key.CodeZ,

C.XK_1: key.Code1,
C.XK_2: key.Code2,
C.XK_3: key.Code3,
C.XK_4: key.Code4,
C.XK_5: key.Code5,
C.XK_6: key.Code6,
C.XK_7: key.Code7,
C.XK_8: key.Code8,
C.XK_9: key.Code9,
C.XK_0: key.Code0,

C.XK_Return: key.CodeReturnEnter,
C.XK_Escape: key.CodeEscape,
C.XK_BackSpace: key.CodeDeleteBackspace,
C.XK_Tab: key.CodeTab,
C.XK_space: key.CodeSpacebar,
C.XK_minus: key.CodeHyphenMinus,
C.XK_equal: key.CodeEqualSign,
C.XK_bracketleft: key.CodeLeftSquareBracket,
C.XK_bracketright: key.CodeRightSquareBracket,
C.XK_backslash: key.CodeBackslash,
C.XK_semicolon: key.CodeSemicolon,
C.XK_apostrophe: key.CodeApostrophe,
C.XK_grave: key.CodeGraveAccent,
C.XK_comma: key.CodeComma,
C.XK_period: key.CodeFullStop,
C.XK_slash: key.CodeSlash,
C.XK_Caps_Lock: key.CodeCapsLock,

C.XK_F1: key.CodeF1,
C.XK_F2: key.CodeF2,
C.XK_F3: key.CodeF3,
C.XK_F4: key.CodeF4,
C.XK_F5: key.CodeF5,
C.XK_F6: key.CodeF6,
C.XK_F7: key.CodeF7,
C.XK_F8: key.CodeF8,
C.XK_F9: key.CodeF9,
C.XK_F10: key.CodeF10,
C.XK_F11: key.CodeF11,
C.XK_F12: key.CodeF12,

C.XK_Pause: key.CodePause,
C.XK_Insert: key.CodeInsert,
C.XK_Home: key.CodeHome,
C.XK_Page_Up: key.CodePageUp,
C.XK_Delete: key.CodeDeleteForward,
C.XK_End: key.CodeEnd,
C.XK_Page_Down: key.CodePageDown,

C.XK_Right: key.CodeRightArrow,
C.XK_Left: key.CodeLeftArrow,
C.XK_Down: key.CodeDownArrow,
C.XK_Up: key.CodeUpArrow,

C.XK_Num_Lock: key.CodeKeypadNumLock,
C.XK_KP_Divide: key.CodeKeypadSlash,
C.XK_KP_Multiply: key.CodeKeypadAsterisk,
C.XK_KP_Subtract: key.CodeKeypadHyphenMinus,
C.XK_KP_Add: key.CodeKeypadPlusSign,
C.XK_KP_Enter: key.CodeKeypadEnter,
C.XK_KP_1: key.CodeKeypad1,
C.XK_KP_2: key.CodeKeypad2,
C.XK_KP_3: key.CodeKeypad3,
C.XK_KP_4: key.CodeKeypad4,
C.XK_KP_5: key.CodeKeypad5,
C.XK_KP_6: key.CodeKeypad6,
C.XK_KP_7: key.CodeKeypad7,
C.XK_KP_8: key.CodeKeypad8,
C.XK_KP_9: key.CodeKeypad9,
C.XK_KP_0: key.CodeKeypad0,
C.XK_KP_Decimal: key.CodeKeypadFullStop,
C.XK_KP_Equal: key.CodeKeypadEqualSign,

C.XK_F13: key.CodeF13,
C.XK_F14: key.CodeF14,
C.XK_F15: key.CodeF15,
C.XK_F16: key.CodeF16,
C.XK_F17: key.CodeF17,
C.XK_F18: key.CodeF18,
C.XK_F19: key.CodeF19,
C.XK_F20: key.CodeF20,
C.XK_F21: key.CodeF21,
C.XK_F22: key.CodeF22,
C.XK_F23: key.CodeF23,
C.XK_F24: key.CodeF24,

C.XK_Help: key.CodeHelp,

C.XK_Control_L: key.CodeLeftControl,
C.XK_Shift_L: key.CodeLeftShift,
C.XK_Alt_L: key.CodeLeftAlt,
C.XK_Super_L: key.CodeLeftGUI,
C.XK_Control_R: key.CodeRightControl,
C.XK_Shift_R: key.CodeRightShift,
C.XK_Alt_R: key.CodeRightAlt,
C.XK_Super_R: key.CodeRightGUI,

C.XK_Multi_key: key.CodeCompose,
}

//export onKeyEvent
func onKeyEvent(ce *C.XKeyEvent) {
e := key.Event{}
// TODO: detect repeats
if ce._type == C.KeyPress {
e.Direction = key.DirPress
} else {
e.Direction = key.DirRelease
ce._type = C.KeyPress
}

if ce.state&C.ShiftMask != 0 {
e.Modifiers |= key.ModShift
}
if ce.state&C.ControlMask != 0 {
e.Modifiers |= key.ModControl
}
if ce.state&C.Mod1Mask != 0 {
e.Modifiers |= key.ModAlt
}

var keysym C.KeySym
var status C.Status
var text [32]C.char
C.Xutf8LookupString(C.x_ic, ce, &text[0], C.int(len(text)-1), &keysym, &status)

if status == C.XBufferOverflow {
// more than 32 bytes for one event - ignore this unlikely case
return
}

if status == C.XLookupChars || status == C.XLookupBoth {
e.Rune = []rune(C.GoStringN(&text[0], C.int(len(text))))[0]
}

if status == C.XLookupKeySym || status == C.XLookupBoth {
e.Code = keyMap[keysym]
}

theApp.eventsIn <- e
}

var stopped bool

//export onStop
Expand Down