246 lines
7.8 KiB
Go
246 lines
7.8 KiB
Go
// +build !windows,!darwin,!plan9
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// TODO is there a way to simplify the above? :/
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// 16 february 2014
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package ui
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import (
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"fmt"
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"unsafe"
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)
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// #cgo pkg-config: gtk+-3.0
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// #include "gtk_unix.h"
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import "C"
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func gtk_init() error {
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var err *C.GError = nil // redundant in Go, but let's explicitly assign it anyway
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// gtk_init_with_args() gives us error info (thanks chpe in irc.gimp.net/#gtk+)
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// TODO allow GTK+ standard command-line argument processing?
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result := C.gtk_init_with_args(nil, nil, nil, nil, nil, &err)
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if result == C.FALSE {
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return fmt.Errorf("%s", fromgstr(err.message))
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}
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return nil
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}
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func gtk_main_quit() {
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C.gtk_main_quit()
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}
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func gtk_window_new() *C.GtkWidget {
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return C.gtk_window_new(C.GTK_WINDOW_TOPLEVEL)
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}
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func gtk_widget_show(widget *C.GtkWidget) {
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C.gtk_widget_show_all(widget)
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}
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func gtk_widget_hide(widget *C.GtkWidget) {
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C.gtk_widget_hide(widget)
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}
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func gtk_window_set_title(window *C.GtkWidget, title string) {
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ctitle := C.CString(title)
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defer C.free(unsafe.Pointer(ctitle))
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C.gtk_window_set_title(togtkwindow(window), togstr(ctitle))
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}
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func gtk_window_get_title(window *C.GtkWidget) string {
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return fromgstr(C.gtk_window_get_title(togtkwindow(window)))
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}
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func gtk_window_resize(window *C.GtkWidget, width int, height int) {
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C.gtk_window_resize(togtkwindow(window), C.gint(width), C.gint(height))
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}
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func gtk_window_get_size(window *C.GtkWidget) (int, int) {
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var width, height C.gint
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C.gtk_window_get_size(togtkwindow(window), &width, &height)
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return int(width), int(height)
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}
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// on some themes, such as oxygen-gtk, GtkLayout draws a solid-color background, not the window background (as GtkFixed and GtkDrawingArea do)
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// this CSS fixes it
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// thanks to drahnr and ptomato in http://stackoverflow.com/questions/22940588/how-do-i-really-make-a-gtk-3-gtklayout-transparent-draw-theme-background
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// this has now been reported to the Oyxgen maintainers (https://bugs.kde.org/show_bug.cgi?id=333983); I'm not sure if I'll remove this or not when that's fixed (only if it breaks other styles... I *think* it breaks elementary OS? need to check again)
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var gtkLayoutCSS = []byte(`GtkLayout {
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background-color: transparent;
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}
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`)
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func makeTransparent(layout *C.GtkWidget) {
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var err *C.GError = nil
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provider := C.gtk_css_provider_new()
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added := C.gtk_css_provider_load_from_data(provider,
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(*C.gchar)(unsafe.Pointer(>kLayoutCSS[0])), C.gssize(len(gtkLayoutCSS)), &err)
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if added == C.FALSE {
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message := fromgstr(err.message)
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panic(fmt.Errorf("error loading transparent background CSS for GtkLayout: %s", message))
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}
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C.gtk_style_context_add_provider(C.gtk_widget_get_style_context(layout),
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(*C.GtkStyleProvider)(unsafe.Pointer(provider)),
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C.GTK_STYLE_PROVIDER_PRIORITY_USER)
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}
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// this should allow us to resize the window arbitrarily
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// thanks to Company in irc.gimp.net/#gtk+
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func gtkNewWindowLayout() *C.GtkWidget {
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layout := C.gtk_layout_new(nil, nil)
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makeTransparent(layout)
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scrollarea := C.gtk_scrolled_window_new((*C.GtkAdjustment)(nil), (*C.GtkAdjustment)(nil))
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C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(scrollarea)), layout)
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// never show scrollbars; we're just doing this to allow arbitrary resizes
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C.gtk_scrolled_window_set_policy((*C.GtkScrolledWindow)(unsafe.Pointer(scrollarea)),
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C.GTK_POLICY_NEVER, C.GTK_POLICY_NEVER)
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return scrollarea
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}
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func gtk_container_add(container *C.GtkWidget, widget *C.GtkWidget) {
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C.gtk_container_add(togtkcontainer(container), widget)
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}
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func gtkAddWidgetToLayout(container *C.GtkWidget, widget *C.GtkWidget) {
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layout := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(container)))
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C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(layout)), widget)
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}
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func gtkMoveWidgetInLayout(container *C.GtkWidget, widget *C.GtkWidget, x int, y int) {
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layout := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(container)))
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C.gtk_layout_move((*C.GtkLayout)(unsafe.Pointer(layout)), widget,
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C.gint(x), C.gint(y))
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}
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func gtk_widget_set_size_request(widget *C.GtkWidget, width int, height int) {
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C.gtk_widget_set_size_request(widget, C.gint(width), C.gint(height))
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}
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func gtk_button_new() *C.GtkWidget {
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return C.gtk_button_new()
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}
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func gtk_button_set_label(button *C.GtkWidget, label string) {
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clabel := C.CString(label)
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defer C.free(unsafe.Pointer(clabel))
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C.gtk_button_set_label(togtkbutton(button), togstr(clabel))
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}
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func gtk_button_get_label(button *C.GtkWidget) string {
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return fromgstr(C.gtk_button_get_label(togtkbutton(button)))
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}
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func gtk_check_button_new() *C.GtkWidget {
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return C.gtk_check_button_new()
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}
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func gtk_toggle_button_get_active(widget *C.GtkWidget) bool {
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return fromgbool(C.gtk_toggle_button_get_active(togtktogglebutton(widget)))
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}
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func gtk_combo_box_text_new() *C.GtkWidget {
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return C.gtk_combo_box_text_new()
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}
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func gtk_combo_box_text_new_with_entry() *C.GtkWidget {
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return C.gtk_combo_box_text_new_with_entry()
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}
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func gtk_combo_box_text_get_active_text(widget *C.GtkWidget) string {
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return fromgstr(C.gtk_combo_box_text_get_active_text(togtkcombobox(widget)))
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}
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func gtk_combo_box_text_append_text(widget *C.GtkWidget, text string) {
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ctext := C.CString(text)
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defer C.free(unsafe.Pointer(ctext))
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C.gtk_combo_box_text_append_text(togtkcombobox(widget), togstr(ctext))
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}
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func gtk_combo_box_text_insert_text(widget *C.GtkWidget, index int, text string) {
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ctext := C.CString(text)
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defer C.free(unsafe.Pointer(ctext))
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C.gtk_combo_box_text_insert_text(togtkcombobox(widget), C.gint(index), togstr(ctext))
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}
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func gtk_combo_box_get_active(widget *C.GtkWidget) int {
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cb := (*C.GtkComboBox)(unsafe.Pointer(widget))
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return int(C.gtk_combo_box_get_active(cb))
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}
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func gtk_combo_box_text_remove(widget *C.GtkWidget, index int) {
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C.gtk_combo_box_text_remove(togtkcombobox(widget), C.gint(index))
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}
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func gtkComboBoxLen(widget *C.GtkWidget) int {
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cb := (*C.GtkComboBox)(unsafe.Pointer(widget))
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model := C.gtk_combo_box_get_model(cb)
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// this is the same as with a Listbox so
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return gtkTreeModelListLen(model)
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}
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func gtk_entry_new() *C.GtkWidget {
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return C.gtk_entry_new()
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}
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func gtkPasswordEntryNew() *C.GtkWidget {
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e := gtk_entry_new()
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C.gtk_entry_set_visibility(togtkentry(e), C.FALSE)
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return e
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}
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func gtk_entry_set_text(widget *C.GtkWidget, text string) {
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ctext := C.CString(text)
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defer C.free(unsafe.Pointer(ctext))
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C.gtk_entry_set_text(togtkentry(widget), togstr(ctext))
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}
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func gtk_entry_get_text(widget *C.GtkWidget) string {
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return fromgstr(C.gtk_entry_get_text(togtkentry(widget)))
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}
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var _emptystring = [1]C.gchar{0}
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var emptystring = &_emptystring[0]
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func gtk_label_new() *C.GtkWidget {
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label := C.gtk_label_new(emptystring)
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C.gtk_label_set_line_wrap(togtklabel(label), C.FALSE) // turn off line wrap
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// don't call gtk_label_set_line_wrap_mode(); there's no "wrap none" value there anyway
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C.gtk_label_set_ellipsize(togtklabel(label), C.PANGO_ELLIPSIZE_NONE) // turn off ellipsizing; this + line wrapping above will guarantee cutoff as documented
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return label
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// TODO left-justify?
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}
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func gtk_label_set_text(widget *C.GtkWidget, text string) {
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ctext := C.CString(text)
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defer C.free(unsafe.Pointer(ctext))
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C.gtk_label_set_text(togtklabel(widget), togstr(ctext))
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}
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func gtk_label_get_text(widget *C.GtkWidget) string {
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return fromgstr(C.gtk_label_get_text(togtklabel(widget)))
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}
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func gtk_widget_get_preferred_size(widget *C.GtkWidget) (minWidth int, minHeight int, natWidth int, natHeight int) {
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var minimum, natural C.GtkRequisition
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C.gtk_widget_get_preferred_size(widget, &minimum, &natural)
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return int(minimum.width), int(minimum.height),
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int(natural.width), int(natural.height)
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}
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func gtk_progress_bar_new() *C.GtkWidget {
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return C.gtk_progress_bar_new()
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}
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func gtk_progress_bar_set_fraction(w *C.GtkWidget, percent int) {
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p := C.gdouble(percent) / 100
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C.gtk_progress_bar_set_fraction(togtkprogressbar(w), p)
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}
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func gtk_progress_bar_pulse(w *C.GtkWidget) {
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C.gtk_progress_bar_pulse(togtkprogressbar(w))
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}
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