121 lines
2.5 KiB
Go
121 lines
2.5 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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modallevel int
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closing *event
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*container
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}
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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, control Control) *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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container: newContainer(control),
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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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hresult := C.EnableThemeDialogTexture(w.hwnd, C.ETDT_ENABLE | C.ETDT_USETABTEXTURE)
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if hresult != C.S_OK {
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panic(fmt.Errorf("error setting tab background texture on Window; HRESULT: 0x%X", hresult))
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}
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w.container.setParent(w.hwnd)
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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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// the origin of the window's content area is always (0, 0), but let's use the values from the RECT just to be safe
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w.container.move(r)
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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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//export windowBeginModal
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func windowBeginModal(data unsafe.Pointer) {
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w := (*window)(data)
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C.EnableWindow(w.hwnd, C.FALSE)
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w.modallevel++
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}
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//export windowEndModal
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func windowEndModal(data unsafe.Pointer) {
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w := (*window)(data)
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w.modallevel--
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if w.modallevel == 0 {
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C.EnableWindow(w.hwnd, C.TRUE)
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} else if w.modallevel < 0 {
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panic("window begin/end modal mismatch")
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}
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}
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