func (this *Canvas) DrawRect(rect *Rect, pen *Pen, brush *Brush) {
w32Rect := rect.GetW32Rect()
previousPen := w32.SelectObject(this.hdc, w32.HGDIOBJ(pen.GetHPEN()))
defer w32.SelectObject(this.hdc, previousPen)
previousBrush := w32.SelectObject(this.hdc, w32.HGDIOBJ(brush.GetHBRUSH()))
defer w32.SelectObject(this.hdc, previousBrush)
w32.Rectangle(this.hdc, int(w32Rect.Left), int(w32Rect.Top), int(w32Rect.Right), int(w32Rect.Bottom))
}
// Rectangle draws a rectangle in the window.
func (win *window) Rectangle(rect image.Rectangle, fill bool) {
if win.dc == 0 {
return
}
if !fill {
pts := []w32.POINT{
{X: int32(rect.Min.X), Y: int32(rect.Min.Y)},
{X: int32(rect.Max.X), Y: int32(rect.Min.Y)},
{X: int32(rect.Max.X), Y: int32(rect.Max.Y)},
{X: int32(rect.Min.X), Y: int32(rect.Max.Y)},
{X: int32(rect.Min.X), Y: int32(rect.Min.Y)},
}
polyLine(win.dc, pts)
return
}
w32.Rectangle(win.dc, rect.Min.X, rect.Min.Y, rect.Max.X, rect.Max.Y)
}
// WinEvent proccess a win32 event.
func winEvent(id w32.HWND, event uint32, wParam, lParam uintptr) uintptr {
w, ok := widgetTable[id]
if !ok {
return w32.DefWindowProc(id, event, wParam, lParam)
}
switch event {
case w32.WM_CHAR:
r := utf16.Decode([]uint16{uint16(loWord(uint32(wParam)))})
if len(r) == 0 {
break
}
key := r[0]
if key == 0 {
break
}
if (key == '\b') || (key == '\t') || (key == '\n') || (key == '\r') {
break
}
ev := sparta.KeyEvent{
Key: sparta.Key(key),
State: getState(),
}
x, y, _ := w32.GetCursorPos()
ev.Loc.X, ev.Loc.Y, _ = w32.ScreenToClient(id, x, y)
w.OnEvent(ev)
case w32.WM_CLOSE:
if w.Property(sparta.Parent) != nil {
break
}
w.OnEvent(sparta.CloseEvent{})
case w32.WM_KEYDOWN:
key := getKeyValue(wParam)
if key == 0 {
break
}
if (key & sparta.KeyNoChar) == 0 {
break
}
ev := sparta.KeyEvent{
Key: key,
State: getState(),
}
x, y, _ := w32.GetCursorPos()
ev.Loc.X, ev.Loc.Y, _ = w32.ScreenToClient(id, x, y)
w.OnEvent(ev)
case w32.WM_KEYUP:
key := getKeyValue(wParam)
if key == 0 {
break
}
ev := sparta.KeyEvent{
Key: -key,
State: getState(),
}
x, y, _ := w32.GetCursorPos()
ev.Loc.X, ev.Loc.Y, _ = w32.ScreenToClient(id, x, y)
w.OnEvent(ev)
case w32.WM_LBUTTONDOWN, w32.WM_RBUTTONDOWN, w32.WM_MBUTTONDOWN:
ev := sparta.MouseEvent{
Button: getButton(event),
State: getState(),
Loc: image.Pt(getXLParam(lParam), getYLParam(lParam)),
}
w.OnEvent(ev)
w.Focus()
case w32.WM_LBUTTONUP, w32.WM_RBUTTONUP, w32.WM_MBUTTONUP:
ev := sparta.MouseEvent{
Button: -getButton(event),
State: getState(),
Loc: image.Pt(getXLParam(lParam), getYLParam(lParam)),
}
w.OnEvent(ev)
case w32.WM_MOUSEMOVE:
ev := sparta.MouseEvent{
Loc: image.Pt(getXLParam(lParam), getYLParam(lParam)),
}
w.OnEvent(ev)
case w32.WM_MOUSEWHEEL:
ev := sparta.MouseEvent{
Button: sparta.MouseWheel,
}
if getWheelDeltaWParam(wParam) < 0 {
ev.Button = -sparta.MouseWheel
}
ev.Loc.X, ev.Loc.Y, _ = w32.ScreenToClient(id, getXLParam(lParam), getYLParam(lParam))
w = propagateWheel(w, ev.Loc)
w.OnEvent(ev)
case w32.WM_MOVE:
win := w.Window().(*window)
win.pos.X, win.pos.Y = int(loWord(uint32(lParam))), int(hiWord(uint32(lParam)))
case w32.WM_PAINT:
win := w.Window().(*window)
ps := &w32.PAINTSTRUCT{}
win.dc = w32.BeginPaint(id, ps)
win.isPaint = true
w32.SetBkMode(win.dc, w32.TRANSPARENT)
w32.SetBkColor(win.dc, win.back.color)
// "clear" the area
w32.SelectObject(win.dc, w32.HGDIOBJ(win.back.brush))
w32.SelectObject(win.dc, w32.HGDIOBJ(win.back.pen))
w32.Rectangle(win.dc, int(ps.RcPaint.Left), int(ps.RcPaint.Top), int(ps.RcPaint.Right), int(ps.RcPaint.Bottom))
w32.SelectObject(win.dc, w32.HGDIOBJ(win.fore.brush))
w32.SelectObject(win.dc, w32.HGDIOBJ(win.fore.pen))
w32.SelectObject(win.dc, w32.HGDIOBJ(winFont))
w32.SetTextColor(win.dc, win.fore.color)
win.curr = win.fore
ev := sparta.ExposeEvent{image.Rect(int(ps.RcPaint.Left), int(ps.RcPaint.Top), int(ps.RcPaint.Right), int(ps.RcPaint.Bottom))}
w.OnEvent(ev)
w32.EndPaint(id, ps)
win.isPaint = false
win.dc = 0
case w32.WM_SIZE:
win := w.Window().(*window)
ev := sparta.ConfigureEvent{image.Rect(win.pos.X, win.pos.Y, win.pos.X+int(loWord(uint32(lParam))), win.pos.Y+int(hiWord(uint32(lParam))))}
w.OnEvent(ev)
case w32.WM_USER:
src, ok := widgetTable[w32.HWND(wParam)]
if !ok {
src = nil
}
ev := sparta.CommandEvent{
Source: src,
Value: int(int32(lParam)),
}
w.OnEvent(ev)
default:
return w32.DefWindowProc(id, event, wParam, lParam)
}
return 0
}