144 lines
4.5 KiB
Go
144 lines
4.5 KiB
Go
// +build !windows,!darwin,!plan9
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// 7 february 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 "gtk_unix.h"
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// extern void our_dialog_response_callback(GtkDialog *, gint, gpointer);
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// /* because cgo seems to choke on ... */
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// /* parent will be NULL if there is no parent, so this is fine */
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// static inline GtkWidget *gtkNewMsgBox(GtkWindow *parent, GtkMessageType type, GtkButtonsType buttons, char *title, char *text)
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// {
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// GtkWidget *k;
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//
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// k = gtk_message_dialog_new(parent, GTK_DIALOG_MODAL, type, buttons, "%s", (gchar *) title);
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// if (text != NULL)
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// gtk_message_dialog_format_secondary_text((GtkMessageDialog *) k, "%s", (gchar *) text);
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// return k;
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// }
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import "C"
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// dialog performs the bookkeeping involved for having a GtkDialog behave the way we want.
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type dialog struct {
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parent *Window
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pwin *C.GtkWindow
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hadgroup C.gboolean
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prevgroup *C.GtkWindowGroup
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newgroup *C.GtkWindowGroup
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result chan int
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}
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func mkdialog(parent *Window) *dialog {
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return &dialog{
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parent: parent,
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result: make(chan int),
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}
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}
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func (d *dialog) prepare() {
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// to implement parent, we need to put the GtkMessageDialog into a new window group along with parent
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// a GtkWindow can only be part of one group
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// so we use this to save the parent window group (if there is one) and store the new window group
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// after showing the message box, we restore the previous window group, so future parent == dialogWindow can work properly
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// thanks to pbor and mclasen in irc.gimp.net/#gtk+
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if d.parent != dialogWindow {
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d.pwin = togtkwindow(d.parent.sysData.widget)
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d.hadgroup = C.gtk_window_has_group(d.pwin)
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// we can't remove a window from the "default window group"; otherwise this throws up Gtk-CRITICAL warnings
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if d.hadgroup != C.FALSE {
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d.prevgroup = C.gtk_window_get_group(d.pwin)
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C.gtk_window_group_remove_window(d.prevgroup, d.pwin)
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}
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d.newgroup = C.gtk_window_group_new()
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C.gtk_window_group_add_window(d.newgroup, d.pwin)
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}
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}
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func (d *dialog) run(mk func() *C.GtkWidget) {
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d.prepare()
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box := mk()
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if d.parent == dialogWindow {
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go func() {
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res := make(chan C.gint)
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defer close(res)
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uitask <- func() {
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r := C.gtk_dialog_run((*C.GtkDialog)(unsafe.Pointer(box)))
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d.cleanup(box)
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res <- r
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}
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d.send(<-res)
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}()
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return
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}
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// otherwise just connect the delete signal
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g_signal_connect_pointer(box, "response", dialog_response_callback, unsafe.Pointer(d))
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C.gtk_widget_show_all(box)
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}
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//export our_dialog_response_callback
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func our_dialog_response_callback(box *C.GtkDialog, res C.gint, data C.gpointer) {
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d := (*dialog)(unsafe.Pointer(data))
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d.cleanup((*C.GtkWidget)(unsafe.Pointer(box)))
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go d.send(res) // send on another goroutine, like everything else
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}
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var dialog_response_callback = C.GCallback(C.our_dialog_response_callback)
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func (d *dialog) cleanup(box *C.GtkWidget) {
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// have to explicitly close the dialog box, otherwise wacky things will happen
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C.gtk_widget_destroy(box)
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if d.parent != dialogWindow {
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C.gtk_window_group_remove_window(d.newgroup, d.pwin)
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C.g_object_unref(C.gpointer(unsafe.Pointer(d.newgroup))) // free the group
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if d.prevgroup != nil {
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C.gtk_window_group_add_window(d.prevgroup, d.pwin)
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} // otherwise it'll go back into the default group on its own
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}
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}
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func (d *dialog) send(res C.gint) {
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// this is where processing would go
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d.result <- int(res)
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}
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func _msgBox(parent *Window, primarytext string, secondarytext string, msgtype C.GtkMessageType, buttons C.GtkButtonsType) (result chan int) {
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result = make(chan int)
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d := mkdialog(parent)
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uitask <- func() {
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cprimarytext := C.CString(primarytext)
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defer C.free(unsafe.Pointer(cprimarytext))
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csecondarytext := (*C.char)(nil)
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if secondarytext != "" {
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csecondarytext = C.CString(secondarytext)
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defer C.free(unsafe.Pointer(csecondarytext))
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}
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d.run(func() *C.GtkWidget {
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return C.gtkNewMsgBox(d.pwin, msgtype, buttons, cprimarytext, csecondarytext)
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})
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}
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return d.result
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}
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func (w *Window) msgBox(primarytext string, secondarytext string) (done chan struct{}) {
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done = make(chan struct{})
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go func() {
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<-_msgBox(w, primarytext, secondarytext, C.GtkMessageType(C.GTK_MESSAGE_OTHER), C.GtkButtonsType(C.GTK_BUTTONS_OK))
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done <- struct{}{}
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}()
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return done
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}
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func (w *Window) msgBoxError(primarytext string, secondarytext string) (done chan struct{}) {
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done = make(chan struct{})
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go func() {
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<-_msgBox(w, primarytext, secondarytext, C.GtkMessageType(C.GTK_MESSAGE_ERROR), C.GtkButtonsType(C.GTK_BUTTONS_OK))
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done <- struct{}{}
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}()
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return done
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}
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