100 lines
1.8 KiB
Go
100 lines
1.8 KiB
Go
// 12 july 2014
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package ui
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import (
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"fmt"
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"syscall"
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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 window struct {
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hwnd C.HWND
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shownbefore bool
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child Control
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closing *event
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spaced bool
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}
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const windowclassname = ""
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var windowclassptr = syscall.StringToUTF16Ptr(windowclassname)
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func makeWindowWindowClass() error {
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var errmsg *C.char
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err := C.makeWindowWindowClass(&errmsg)
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if err != 0 || errmsg != nil {
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return fmt.Errorf("%s: %v", C.GoString(errmsg), syscall.Errno(err))
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}
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return nil
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}
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func newWindow(title string, width int, height int) *window {
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w := &window{
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// hwnd set in WM_CREATE handler
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closing: newEvent(),
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}
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hwnd := C.newWindow(toUTF16(title), C.int(width), C.int(height), unsafe.Pointer(w))
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if hwnd != w.hwnd {
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panic(fmt.Errorf("inconsistency: hwnd returned by CreateWindowEx() (%p) and hwnd stored in window (%p) differ", hwnd, w.hwnd))
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}
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return w
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}
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func (w *window) Title() string {
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return getWindowText(w.hwnd)
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}
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func (w *window) SetTitle(title string) {
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C.setWindowText(w.hwnd, toUTF16(title))
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}
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func (w *window) Show() {
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if !w.shownbefore {
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C.ShowWindow(w.hwnd, C.nCmdShow)
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C.updateWindow(w.hwnd)
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w.shownbefore = true
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} else {
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C.ShowWindow(w.hwnd, C.SW_SHOW)
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}
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}
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func (w *window) Hide() {
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C.ShowWindow(w.hwnd, C.SW_HIDE)
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}
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func (w *window) Close() {
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C.windowClose(w.hwnd)
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}
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func (w *window) OnClosing(e func() bool) {
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w.closing.setbool(e)
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}
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//export storeWindowHWND
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func storeWindowHWND(data unsafe.Pointer, hwnd C.HWND) {
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w := (*window)(data)
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w.hwnd = hwnd
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}
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//export windowResize
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func windowResize(data unsafe.Pointer, r *C.RECT) {
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w := (*window)(data)
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w.doresize(int(r.right - r.left), int(r.bottom - r.top))
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}
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//export windowClosing
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func windowClosing(data unsafe.Pointer) {
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w := (*window)(data)
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close := w.closing.fire()
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if close {
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C.windowClose(w.hwnd)
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}
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}
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