andlabs-ui/gtkcalls_unix.go

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// +build !windows,!darwin,!plan9
// TODO is there a way to simplify the above? :/
// 16 february 2014
package ui
import (
"fmt"
"unsafe"
)
// #include "gtk_unix.h"
import "C"
var gtkStyles = []byte(
// this first one is for ProgressBar so we can arbitrarily resize it
// min-horizontal-bar-width is a style property; we do it through CSS
// thanks tristan in irc.gimp.net/#gtk+
`* {
-GtkProgressBar-min-horizontal-bar-width: 1;
}
` +
// on some themes, such as oxygen-gtk, GtkLayout draws a solid-color background, not the window background (as GtkFixed and GtkDrawingArea do)
// this CSS fixes it
// thanks to drahnr and ptomato in http://stackoverflow.com/questions/22940588/how-do-i-really-make-a-gtk-3-gtklayout-transparent-draw-theme-background
// 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)
`GtkLayout {
background-color: transparent;
}
` +
"\000")
func gtk_init() error {
var err *C.GError = nil // redundant in Go, but let's explicitly assign it anyway
// gtk_init_with_args() gives us error info (thanks chpe in irc.gimp.net/#gtk+)
// TODO allow GTK+ standard command-line argument processing?
result := C.gtk_init_with_args(nil, nil, nil, nil, nil, &err)
if result == C.FALSE {
return fmt.Errorf("error actually initilaizing GTK+: %s", fromgstr(err.message))
}
// now apply our custom program-global styles
provider := C.gtk_css_provider_new();
if C.gtk_css_provider_load_from_data(provider, (*C.gchar)(unsafe.Pointer(&gtkStyles[0])), -1, &err) == C.FALSE {
return fmt.Errorf("error applying package ui's custom program-global styles to GTK+: %v", fromgstr(err.message))
}
// GDK (at least as far back as GTK+ 3.4, but officially documented as of 3.10) merges all screens into one big one, so we don't need to worry about multimonitor
// thanks to baedert and mclasen in irc.gimp.net/#gtk+
C.gtk_style_context_add_provider_for_screen(C.gdk_screen_get_default(),
(*C.GtkStyleProvider)(unsafe.Pointer(provider)),
C.GTK_STYLE_PROVIDER_PRIORITY_USER)
return nil
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}
func gtk_main_quit() {
C.gtk_main_quit()
}
func gtk_window_new() *C.GtkWidget {
return C.gtk_window_new(C.GTK_WINDOW_TOPLEVEL)
}
func gtk_widget_show(widget *C.GtkWidget) {
C.gtk_widget_show_all(widget)
}
func gtk_widget_hide(widget *C.GtkWidget) {
C.gtk_widget_hide(widget)
}
func gtk_window_set_title(window *C.GtkWidget, title string) {
ctitle := C.CString(title)
defer C.free(unsafe.Pointer(ctitle))
C.gtk_window_set_title(togtkwindow(window), togstr(ctitle))
}
func gtk_window_get_title(window *C.GtkWidget) string {
return fromgstr(C.gtk_window_get_title(togtkwindow(window)))
}
func gtk_window_resize(window *C.GtkWidget, width int, height int) {
C.gtk_window_resize(togtkwindow(window), C.gint(width), C.gint(height))
}
func gtk_window_get_size(window *C.GtkWidget) (int, int) {
var width, height C.gint
C.gtk_window_get_size(togtkwindow(window), &width, &height)
return int(width), int(height)
}
// this should allow us to resize the window arbitrarily
// thanks to Company in irc.gimp.net/#gtk+
func gtkNewWindowLayout() *C.GtkWidget {
layout := C.gtk_layout_new(nil, nil)
scrollarea := C.gtk_scrolled_window_new((*C.GtkAdjustment)(nil), (*C.GtkAdjustment)(nil))
C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(scrollarea)), layout)
// never show scrollbars; we're just doing this to allow arbitrary resizes
C.gtk_scrolled_window_set_policy((*C.GtkScrolledWindow)(unsafe.Pointer(scrollarea)),
C.GTK_POLICY_NEVER, C.GTK_POLICY_NEVER)
return scrollarea
}
func gtk_container_add(container *C.GtkWidget, widget *C.GtkWidget) {
C.gtk_container_add(togtkcontainer(container), widget)
}
func gtkAddWidgetToLayout(container *C.GtkWidget, widget *C.GtkWidget) {
layout := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(container)))
C.gtk_container_add((*C.GtkContainer)(unsafe.Pointer(layout)), widget)
}
func gtkMoveWidgetInLayout(container *C.GtkWidget, widget *C.GtkWidget, x int, y int) {
layout := C.gtk_bin_get_child((*C.GtkBin)(unsafe.Pointer(container)))
C.gtk_layout_move((*C.GtkLayout)(unsafe.Pointer(layout)), widget,
C.gint(x), C.gint(y))
}
func gtk_widget_set_size_request(widget *C.GtkWidget, width int, height int) {
C.gtk_widget_set_size_request(widget, C.gint(width), C.gint(height))
}
func gtk_button_new() *C.GtkWidget {
return C.gtk_button_new()
}
func gtk_button_set_label(button *C.GtkWidget, label string) {
clabel := C.CString(label)
defer C.free(unsafe.Pointer(clabel))
C.gtk_button_set_label(togtkbutton(button), togstr(clabel))
}
func gtk_button_get_label(button *C.GtkWidget) string {
return fromgstr(C.gtk_button_get_label(togtkbutton(button)))
}
func gtk_check_button_new() *C.GtkWidget {
return C.gtk_check_button_new()
}
func gtk_toggle_button_get_active(widget *C.GtkWidget) bool {
return fromgbool(C.gtk_toggle_button_get_active(togtktogglebutton(widget)))
}
func gtk_combo_box_text_new() *C.GtkWidget {
return C.gtk_combo_box_text_new()
}
func gtk_combo_box_text_new_with_entry() *C.GtkWidget {
return C.gtk_combo_box_text_new_with_entry()
}
func gtk_combo_box_text_get_active_text(widget *C.GtkWidget) string {
return fromgstr(C.gtk_combo_box_text_get_active_text(togtkcombobox(widget)))
}
func gtk_combo_box_text_append_text(widget *C.GtkWidget, text string) {
ctext := C.CString(text)
defer C.free(unsafe.Pointer(ctext))
C.gtk_combo_box_text_append_text(togtkcombobox(widget), togstr(ctext))
}
func gtk_combo_box_text_insert_text(widget *C.GtkWidget, index int, text string) {
ctext := C.CString(text)
defer C.free(unsafe.Pointer(ctext))
C.gtk_combo_box_text_insert_text(togtkcombobox(widget), C.gint(index), togstr(ctext))
}
func gtk_combo_box_get_active(widget *C.GtkWidget) int {
cb := (*C.GtkComboBox)(unsafe.Pointer(widget))
return int(C.gtk_combo_box_get_active(cb))
}
func gtk_combo_box_text_remove(widget *C.GtkWidget, index int) {
C.gtk_combo_box_text_remove(togtkcombobox(widget), C.gint(index))
}
func gtkComboBoxLen(widget *C.GtkWidget) int {
cb := (*C.GtkComboBox)(unsafe.Pointer(widget))
model := C.gtk_combo_box_get_model(cb)
// this is the same as with a Listbox so
return gtkTreeModelListLen(model)
}
func gtk_entry_new() *C.GtkWidget {
e := C.gtk_entry_new()
// allows the GtkEntry to be resized with the window smaller than what it thinks the size should be
// thanks to Company in irc.gimp.net/#gtk+
C.gtk_entry_set_width_chars(togtkentry(e), 0)
return e
}
func gtkPasswordEntryNew() *C.GtkWidget {
e := gtk_entry_new()
C.gtk_entry_set_visibility(togtkentry(e), C.FALSE)
return e
}
func gtk_entry_set_text(widget *C.GtkWidget, text string) {
ctext := C.CString(text)
defer C.free(unsafe.Pointer(ctext))
C.gtk_entry_set_text(togtkentry(widget), togstr(ctext))
}
func gtk_entry_get_text(widget *C.GtkWidget) string {
return fromgstr(C.gtk_entry_get_text(togtkentry(widget)))
}
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var _emptystring = [1]C.gchar{0}
var emptystring = &_emptystring[0]
func gtk_label_new() *C.GtkWidget {
label := C.gtk_label_new(emptystring)
C.gtk_label_set_line_wrap(togtklabel(label), C.FALSE) // turn off line wrap
// don't call gtk_label_set_line_wrap_mode(); there's no "wrap none" value there anyway
C.gtk_label_set_ellipsize(togtklabel(label), C.PANGO_ELLIPSIZE_NONE) // turn off ellipsizing; this + line wrapping above will guarantee cutoff as documented
// there's a function gtk_label_set_justify() that indicates GTK_JUSTIFY_LEFT is the default
// but this actually is NOT the control justification, just the multi-line justification
// so we need to do THIS instead
// this will also valign to the top
// thanks to mclasen in irc.gimp.net/#gtk+
C.gtk_misc_set_alignment((*C.GtkMisc)(unsafe.Pointer(label)), 0, 0)
return label
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}
func gtk_label_set_text(widget *C.GtkWidget, text string) {
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ctext := C.CString(text)
defer C.free(unsafe.Pointer(ctext))
C.gtk_label_set_text(togtklabel(widget), togstr(ctext))
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}
func gtk_label_get_text(widget *C.GtkWidget) string {
return fromgstr(C.gtk_label_get_text(togtklabel(widget)))
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}
func gtk_widget_get_preferred_size(widget *C.GtkWidget) (minWidth int, minHeight int, natWidth int, natHeight int) {
var minimum, natural C.GtkRequisition
C.gtk_widget_get_preferred_size(widget, &minimum, &natural)
return int(minimum.width), int(minimum.height),
int(natural.width), int(natural.height)
}
func gtk_progress_bar_new() *C.GtkWidget {
return C.gtk_progress_bar_new()
}
func gtk_progress_bar_set_fraction(w *C.GtkWidget, percent int) {
p := C.gdouble(percent) / 100
C.gtk_progress_bar_set_fraction(togtkprogressbar(w), p)
}
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func gtk_progress_bar_pulse(w *C.GtkWidget) {
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C.gtk_progress_bar_pulse(togtkprogressbar(w))
}