107 lines
1.9 KiB
Go
107 lines
1.9 KiB
Go
// 15 july 2014
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package ui
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import (
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"unsafe"
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)
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// #include "winapi_windows.h"
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import "C"
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type widgetbase struct {
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hwnd C.HWND
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}
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func newWidget(class C.LPCWSTR, style C.DWORD, extstyle C.DWORD) *widgetbase {
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return &widgetbase{
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hwnd: C.newWidget(class, style, extstyle),
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}
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}
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// these few methods are embedded by all the various Controls since they all will do the same thing
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func (w *widgetbase) unparent() {
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C.controlSetParent(w.hwnd, C.msgwin)
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}
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func (w *widgetbase) parent(win *window) {
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C.controlSetParent(w.hwnd, win.hwnd)
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}
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// don't embed these as exported; let each Control decide if it should
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func (w *widgetbase) text() *Request {
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c := make(chan interface{})
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return &Request{
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op: func() {
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c <- getWindowText(w.hwnd)
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},
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resp: c,
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}
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}
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func (w *widgetbase) settext(text string) *Request {
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c := make(chan interface{})
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return &Request{
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op: func() {
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C.setWindowText(w.hwnd, toUTF16(text))
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c <- struct{}{}
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},
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resp: c,
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}
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}
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type button struct {
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*widgetbase
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clicked *event
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}
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var buttonclass = toUTF16("BUTTON")
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func newButton(text string) *Request {
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c := make(chan interface{})
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return &Request{
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op: func() {
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w := newWidget(buttonclass,
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C.BS_PUSHBUTTON | C.WS_TABSTOP,
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0)
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C.setWindowText(w.hwnd, toUTF16(text))
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C.controlSetControlFont(w.hwnd)
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b := &button{
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widgetbase: w,
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clicked: newEvent(),
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}
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C.setButtonSubclass(w.hwnd, unsafe.Pointer(b))
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c <- b
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},
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resp: c,
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}
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}
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func (b *button) OnClicked(e func(c Doer)) *Request {
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c := make(chan interface{})
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return &Request{
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op: func() {
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b.clicked.set(e)
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c <- struct{}{}
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},
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resp: c,
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}
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}
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func (b *button) Text() *Request {
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return b.text()
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}
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func (b *button) SetText(text string) *Request {
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return b.settext(text)
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}
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//export buttonClicked
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func buttonClicked(data unsafe.Pointer) {
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b := (*button)(data)
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b.clicked.fire()
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println("button clicked")
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}
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