211 lines
7.1 KiB
Go
211 lines
7.1 KiB
Go
// +build !windows,!darwin,!plan9
|
|
|
|
// 17 february 2014
|
|
package ui
|
|
|
|
import (
|
|
"unsafe"
|
|
)
|
|
|
|
/*
|
|
GTK+ 3.10 introduces a dedicated GtkListView type for simple listboxes like our Listbox. Unfortunately, since I want to target at least GTK+ 3.4, I need to do things the old, long, and hard way: manually with a GtkTreeView and GtkListStore model.
|
|
|
|
You are not expected to understand this.
|
|
|
|
if you must though:
|
|
GtkTreeViews are model/view. We use a GtkListStore as a model.
|
|
GtkTreeViews also separate selections into another type, but the GtkTreeView creates the selection object for us.
|
|
GtkTreeViews can scroll, but do not draw scrollbars or borders; we need to use a GtkScrolledWindow to hold the GtkTreeView to do so. We return the GtkScrolledWindow and get its control out when we want to access the GtkTreeView.
|
|
Like with Windows, there's a difference between signle-selection and multi-selection GtkTreeViews when it comes to getting the list of selections that we can exploit. The GtkTreeSelection class hands us an iterator and the model (for some reason). We pull a GtkTreePath out of the iterator, which we can then use to get the indices or text data.
|
|
|
|
For more information, read
|
|
https://developer.gnome.org/gtk3/3.4/TreeWidget.html
|
|
http://ubuntuforums.org/showthread.php?t=1208655
|
|
http://scentric.net/tutorial/sec-treemodel-remove-row.html
|
|
http://gtk.10911.n7.nabble.com/Scrollbars-in-a-GtkTreeView-td58076.html
|
|
http://stackoverflow.com/questions/11407447/gtk-treeview-get-current-row-index-in-python (I think; I don't remember if I wound up using this one as a reference or not; I know after that I found the ubuntuforums link above)
|
|
and the GTK+ reference documentation.
|
|
*/
|
|
|
|
// #cgo pkg-config: gtk+-3.0
|
|
// #include <stdlib.h>
|
|
// #include <gtk/gtk.h>
|
|
// /* because cgo seems to choke on ... */
|
|
// void gtkTreeModelGet(GtkTreeModel *model, GtkTreeIter *iter, gchar **gs)
|
|
// {
|
|
// /* 0 is the column #; we only have one column here */
|
|
// gtk_tree_model_get(model, iter, 0, gs, -1);
|
|
// }
|
|
// GtkListStore *gtkListStoreNew(void)
|
|
// {
|
|
// /* 1 column that stores strings */
|
|
// return gtk_list_store_new(1, G_TYPE_STRING);
|
|
// }
|
|
// void gtkListStoreSet(GtkListStore *ls, GtkTreeIter *iter, char *gs)
|
|
// {
|
|
// /* same parameters as in gtkTreeModelGet() */
|
|
// gtk_list_store_set(ls, iter, 0, (gchar *) gs, -1);
|
|
// }
|
|
// GtkTreeViewColumn *gtkTreeViewColumnNewWithAttributes(GtkCellRenderer *renderer)
|
|
// {
|
|
// /* "" is the column header; "text" associates the text of the column with column 0 */
|
|
// return gtk_tree_view_column_new_with_attributes("", renderer, "text", 0, NULL);
|
|
// }
|
|
import "C"
|
|
|
|
func fromgtktreemodel(x *C.GtkTreeModel) *gtkWidget {
|
|
return (*gtkWidget)(unsafe.Pointer(x))
|
|
}
|
|
|
|
func togtktreemodel(what *gtkWidget) *C.GtkTreeModel {
|
|
return (*C.GtkTreeModel)(unsafe.Pointer(what))
|
|
}
|
|
|
|
func fromgtktreeview(x *C.GtkTreeView) *gtkWidget {
|
|
return (*gtkWidget)(unsafe.Pointer(x))
|
|
}
|
|
|
|
func togtktreeview(what *gtkWidget) *C.GtkTreeView {
|
|
return (*C.GtkTreeView)(unsafe.Pointer(what))
|
|
}
|
|
|
|
func gListboxNew(multisel bool) *gtkWidget {
|
|
store := C.gtkListStoreNew()
|
|
widget := C.gtk_tree_view_new_with_model((*C.GtkTreeModel)(unsafe.Pointer(store)))
|
|
tv := (*C.GtkTreeView)(unsafe.Pointer(widget))
|
|
column := C.gtkTreeViewColumnNewWithAttributes(C.gtk_cell_renderer_text_new())
|
|
// TODO set AUTOSIZE?
|
|
C.gtk_tree_view_append_column(tv, column)
|
|
C.gtk_tree_view_set_headers_visible(tv, C.FALSE)
|
|
sel := C.GTK_SELECTION_SINGLE
|
|
if multisel {
|
|
sel = C.GTK_SELECTION_MULTIPLE
|
|
}
|
|
C.gtk_tree_selection_set_mode(C.gtk_tree_view_get_selection(tv), C.GtkSelectionMode(sel))
|
|
scrollarea := C.gtk_scrolled_window_new((*C.GtkAdjustment)(nil), (*C.GtkAdjustment)(nil))
|
|
C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(scrollarea)), widget)
|
|
return fromgtkwidget(scrollarea)
|
|
}
|
|
|
|
func gListboxNewSingle() *gtkWidget {
|
|
return gListboxNew(false)
|
|
}
|
|
|
|
func gListboxNewMulti() *gtkWidget {
|
|
return gListboxNew(true)
|
|
}
|
|
|
|
func getTreeViewFrom(widget *gtkWidget) *C.GtkTreeView {
|
|
wid := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(widget)))
|
|
return (*C.GtkTreeView)(unsafe.Pointer(wid))
|
|
}
|
|
|
|
func gListboxText(widget *gtkWidget) string {
|
|
var model *C.GtkTreeModel
|
|
var iter C.GtkTreeIter
|
|
var gs *C.gchar
|
|
|
|
tv := getTreeViewFrom(widget)
|
|
sel := C.gtk_tree_view_get_selection(tv)
|
|
if !fromgbool(C.gtk_tree_selection_get_selected(sel, &model, &iter)) {
|
|
return ""
|
|
}
|
|
C.gtkTreeModelGet(model, &iter, &gs)
|
|
return C.GoString(fromgchar(gs))
|
|
}
|
|
|
|
func gListboxAppend(widget *gtkWidget, what string) {
|
|
var iter C.GtkTreeIter
|
|
|
|
tv := getTreeViewFrom(widget)
|
|
ls := (*C.GtkListStore)(unsafe.Pointer(C.gtk_tree_view_get_model(tv)))
|
|
C.gtk_list_store_append(ls, &iter)
|
|
cwhat := C.CString(what)
|
|
defer C.free(unsafe.Pointer(cwhat))
|
|
C.gtkListStoreSet(ls, &iter, cwhat)
|
|
}
|
|
|
|
func gListboxInsert(widget *gtkWidget, index int, what string) {
|
|
var iter C.GtkTreeIter
|
|
|
|
tv := getTreeViewFrom(widget)
|
|
ls := (*C.GtkListStore)(unsafe.Pointer(C.gtk_tree_view_get_model(tv)))
|
|
C.gtk_list_store_insert(ls, &iter, C.gint(index))
|
|
cwhat := C.CString(what)
|
|
defer C.free(unsafe.Pointer(cwhat))
|
|
C.gtkListStoreSet(ls, &iter, cwhat)
|
|
}
|
|
|
|
func gListboxSelectedMulti(widget *gtkWidget) (indices []int) {
|
|
var model *C.GtkTreeModel
|
|
|
|
tv := getTreeViewFrom(widget)
|
|
sel := C.gtk_tree_view_get_selection(tv)
|
|
rows := C.gtk_tree_selection_get_selected_rows(sel, &model)
|
|
defer C.g_list_free_full(rows, C.GDestroyNotify(unsafe.Pointer(C.gtk_tree_path_free)))
|
|
// TODO needed?
|
|
len := C.g_list_length(rows)
|
|
if len == 0 {
|
|
return nil
|
|
}
|
|
indices = make([]int, len)
|
|
for i := C.guint(0); i < len; i++ {
|
|
path := (*C.GtkTreePath)(unsafe.Pointer(rows.data))
|
|
idx := C.gtk_tree_path_get_indices(path)
|
|
indices[i] = int(*idx)
|
|
rows = rows.next
|
|
}
|
|
return indices
|
|
}
|
|
|
|
func gListboxSelMultiTexts(widget *gtkWidget) (texts []string) {
|
|
var model *C.GtkTreeModel
|
|
var iter C.GtkTreeIter
|
|
var gs *C.gchar
|
|
|
|
tv := getTreeViewFrom(widget)
|
|
sel := C.gtk_tree_view_get_selection(tv)
|
|
rows := C.gtk_tree_selection_get_selected_rows(sel, &model)
|
|
defer C.g_list_free_full(rows, C.GDestroyNotify(unsafe.Pointer(C.gtk_tree_path_free)))
|
|
len := C.g_list_length(rows)
|
|
if len == 0 {
|
|
return nil
|
|
}
|
|
texts = make([]string, len)
|
|
for i := C.guint(0); i < len; i++ {
|
|
path := (*C.GtkTreePath)(unsafe.Pointer(rows.data))
|
|
if !fromgbool(C.gtk_tree_model_get_iter(model, &iter, path)) {
|
|
// TODO
|
|
return
|
|
}
|
|
C.gtkTreeModelGet(model, &iter, &gs)
|
|
texts[i] = C.GoString(fromgchar(gs))
|
|
rows = rows.next
|
|
}
|
|
return texts
|
|
}
|
|
|
|
func gListboxDelete(widget *gtkWidget, index int) {
|
|
var iter C.GtkTreeIter
|
|
|
|
tv := getTreeViewFrom(widget)
|
|
ls := (*C.GtkListStore)(unsafe.Pointer(C.gtk_tree_view_get_model(tv)))
|
|
if !fromgbool(C.gtk_tree_model_iter_nth_child((*C.GtkTreeModel)(unsafe.Pointer(ls)), &iter, (*C.GtkTreeIter)(nil), C.gint(index))) { // no such index
|
|
// TODO
|
|
return
|
|
}
|
|
C.gtk_list_store_remove(ls, &iter)
|
|
}
|
|
|
|
// this is a separate function because Combobox uses it too
|
|
func gtkTreeModelListLen(model *C.GtkTreeModel) int {
|
|
// "As a special case, if iter is NULL, then the number of toplevel nodes is returned."
|
|
return int(C.gtk_tree_model_iter_n_children(model, (*C.GtkTreeIter)(nil)))
|
|
}
|
|
|
|
func gListboxLen(widget *gtkWidget) int {
|
|
tv := getTreeViewFrom(widget)
|
|
model := C.gtk_tree_view_get_model(tv)
|
|
return gtkTreeModelListLen(model)
|
|
}
|