func (win *window) eventLoop() {
if win.ec == nil {
win.ec = make(chan interface{})
}
eloop:
for win.events {
var ev sdl.Event
for ev.Poll() {
switch ev.Type {
case sdl.KEYUP:
key := ev.Keyboard().Keysym.Sym
win.ec <- gui.KeyEvent{int(-key)}
case sdl.KEYDOWN:
key := ev.Keyboard().Keysym.Sym
win.ec <- gui.KeyEvent{int(key)}
case sdl.MOUSEMOTION:
m := ev.MouseMotion()
win.ec <- gui.MouseEvent{
Buttons: int(m.State),
Loc: image.Pt(int(m.X), int(m.Y)),
Nsec: time.Nanoseconds(),
}
case sdl.MOUSEBUTTONUP, sdl.MOUSEBUTTONDOWN:
m := ev.MouseButton()
win.ec <- gui.MouseEvent{
Buttons: int(sdl.GetMouseState(nil, nil)),
Loc: image.Pt(int(m.X), int(m.Y)),
Nsec: time.Nanoseconds(),
}
case sdl.VIDEORESIZE:
r := ev.Resize()
win.ec <- gui.ConfigEvent{image.Config{
win.Screen().ColorModel(),
int(r.W),
int(r.H),
}}
case sdl.QUIT:
break eloop
}
}
}
close(win.ec)
}
func main() {
runtime.LockOSThread()
flag.Parse()
buildPalette()
sdl.Init(sdl.INIT_VIDEO)
defer sdl.Quit()
sdl.GL_SetAttribute(sdl.GL_SWAP_CONTROL, 1)
if sdl.SetVideoMode(512, 512, 32, sdl.OPENGL) == nil {
panic("sdl error")
}
if gl.Init() != 0 {
panic("gl error")
}
sdl.WM_SetCaption("Gomandel", "Gomandel")
gl.Enable(gl.TEXTURE_2D)
gl.Viewport(0, 0, 512, 512)
gl.MatrixMode(gl.PROJECTION)
gl.LoadIdentity()
gl.Ortho(0, 512, 512, 0, -1, 1)
gl.ClearColor(0, 0, 0, 0)
//-----------------------------------------------------------------------------
var dndDragging bool = false
var dndStart Point
var dndEnd Point
var tex gl.Texture
var tc TexCoords
var lastProgress int
initialRect := Rect{-1.5, -1.5, 3, 3}
rect := initialRect
rc := new(MandelbrotRequest)
rc.MakeRequest(512, 512, rect)
rc.WaitFor(Small, &tex, &tc)
running := true
e := new(sdl.Event)
for running {
for e.Poll() {
switch e.Type {
case sdl.QUIT:
running = false
case sdl.MOUSEBUTTONDOWN:
dndDragging = true
sdl.GetMouseState(&dndStart.X, &dndStart.Y)
dndEnd = dndStart
case sdl.MOUSEBUTTONUP:
dndDragging = false
sdl.GetMouseState(&dndEnd.X, &dndEnd.Y)
if e.MouseButton().Button == 3 {
rect = initialRect
} else {
rect = rectFromSelection(dndStart, dndEnd, 512, 512, rect)
tc = texCoordsFromSelection(dndStart, dndEnd, 512, 512, tc)
}
// make request
rc.MakeRequest(512, 512, rect)
case sdl.MOUSEMOTION:
if dndDragging {
sdl.GetMouseState(&dndEnd.X, &dndEnd.Y)
}
}
}
// if we're waiting for a result, check if it's ready
p := rc.Update(&tex, &tc)
if p != -1 {
lastProgress = p
}
gl.Clear(gl.COLOR_BUFFER_BIT)
tex.Bind(gl.TEXTURE_2D)
drawQuad(0, 0, 512, 512, tc.TX, tc.TY, tc.TX2, tc.TY2)
gl.BindTexture(gl.TEXTURE_2D, 0)
if dndDragging {
drawSelection(dndStart, dndEnd)
}
drawProgress(512, 512, lastProgress, rc.Pending)
sdl.GL_SwapBuffers()
}
}