static void
insert_variable_cb(GtkWidget *widget, MathVariablePopup *popup)
{
const gchar *name;
name = g_object_get_data(G_OBJECT(widget), "variable_name");
math_equation_insert(popup->priv->equation, name);
gtk_widget_destroy(gtk_widget_get_toplevel(widget));
}
static gboolean
display_key_press_cb(GtkWidget *widget, GdkEventKey *event, MathDisplay *display)
{
int state;
guint32 c;
guint new_keyval = 0;
/* Treat keypad keys as numbers even when numlock is off */
switch(event->keyval)
{
case GDK_KEY_KP_Delete: /* Period without numlock */
new_keyval = GDK_KEY_KP_Decimal;
break;
case GDK_KEY_KP_Insert:
new_keyval = GDK_KEY_0;
break;
case GDK_KEY_KP_End:
new_keyval = GDK_KEY_1;
break;
case GDK_KEY_KP_Down:
new_keyval = GDK_KEY_2;
break;
case GDK_KEY_KP_Page_Down:
new_keyval = GDK_KEY_3;
break;
case GDK_KEY_KP_Left:
new_keyval = GDK_KEY_4;
break;
case GDK_KEY_KP_Begin: /* This is apparently what "5" does when numlock is off. */
new_keyval = GDK_KEY_5;
break;
case GDK_KEY_KP_Right:
new_keyval = GDK_KEY_6;
break;
case GDK_KEY_KP_Home:
new_keyval = GDK_KEY_7;
break;
case GDK_KEY_KP_Up:
new_keyval = GDK_KEY_8;
break;
case GDK_KEY_KP_Page_Up:
new_keyval = GDK_KEY_9;
break;
}
if (new_keyval) {
gboolean result;
GdkEvent *new_event;
new_event = gdk_event_copy((GdkEvent *)event);
((GdkEventKey *)new_event)->keyval = new_keyval;
g_signal_emit_by_name(widget, "key-press-event", new_event, &result);
gdk_event_free(new_event);
return result;
}
state = event->state & (GDK_CONTROL_MASK | GDK_MOD1_MASK);
c = gdk_keyval_to_unicode(event->keyval);
/* Solve on enter */
if (event->keyval == GDK_KEY_Return || event->keyval == GDK_KEY_KP_Enter) {
math_equation_solve(display->priv->equation);
return TRUE;
}
/* Clear on escape */
if ((event->keyval == GDK_KEY_Escape && state == 0) ||
(event->keyval == GDK_KEY_BackSpace && state == GDK_CONTROL_MASK) ||
(event->keyval == GDK_KEY_Delete && state == GDK_SHIFT_MASK)) {
math_equation_clear(display->priv->equation);
return TRUE;
}
/* Numeric keypad will often insert '.' regardless of locale */
if (event->keyval == GDK_KEY_KP_Decimal) {
math_equation_insert_numeric_point(display->priv->equation);
return TRUE;
}
/* Substitute */
if (state == 0) {
if (c == '*') {
math_equation_insert(display->priv->equation, "×");
return TRUE;
}
if (c == '/') {
math_equation_insert(display->priv->equation, "÷");
return TRUE;
}
if (c == '-') {
math_equation_insert_subtract(display->priv->equation);
return TRUE;
}
}
/* Shortcuts */
if (state == GDK_CONTROL_MASK) {
switch(event->keyval)
{
case GDK_KEY_bracketleft:
math_equation_insert(display->priv->equation, "⌈");
return TRUE;
case GDK_KEY_bracketright:
math_equation_insert(display->priv->equation, "⌉");
return TRUE;
case GDK_KEY_e:
math_equation_insert_exponent(display->priv->equation);
return TRUE;
case GDK_KEY_f:
math_equation_factorize(display->priv->equation);
return TRUE;
case GDK_KEY_i:
math_equation_insert(display->priv->equation, "⁻¹");
return TRUE;
case GDK_KEY_p:
math_equation_insert(display->priv->equation, "π");
return TRUE;
case GDK_KEY_r:
math_equation_insert(display->priv->equation, "√");
return TRUE;
case GDK_KEY_u:
math_equation_insert(display->priv->equation, "µ");
return TRUE;
case GDK_KEY_minus:
math_equation_insert(display->priv->equation, "⁻");
return TRUE;
case GDK_KEY_apostrophe:
math_equation_insert(display->priv->equation, "°");
return TRUE;
}
}
if (state == GDK_MOD1_MASK) {
switch(event->keyval)
{
case GDK_KEY_bracketleft:
math_equation_insert(display->priv->equation, "⌊");
return TRUE;
case GDK_KEY_bracketright:
math_equation_insert(display->priv->equation, "⌋");
return TRUE;
}
}
if (state == GDK_CONTROL_MASK || math_equation_get_number_mode(display->priv->equation) == SUPERSCRIPT) {
switch(event->keyval)
{
case GDK_KEY_0:
case GDK_KEY_KP_0:
math_equation_insert(display->priv->equation, "⁰");
return TRUE;
case GDK_KEY_1:
case GDK_KEY_KP_1:
math_equation_insert(display->priv->equation, "¹");
return TRUE;
case GDK_KEY_2:
case GDK_KEY_KP_2:
math_equation_insert(display->priv->equation, "²");
return TRUE;
case GDK_KEY_3:
case GDK_KEY_KP_3:
math_equation_insert(display->priv->equation, "³");
return TRUE;
case GDK_KEY_4:
case GDK_KEY_KP_4:
math_equation_insert(display->priv->equation, "⁴");
return TRUE;
case GDK_KEY_5:
case GDK_KEY_KP_5:
math_equation_insert(display->priv->equation, "⁵");
return TRUE;
case GDK_KEY_6:
case GDK_KEY_KP_6:
math_equation_insert(display->priv->equation, "⁶");
return TRUE;
case GDK_KEY_7:
case GDK_KEY_KP_7:
math_equation_insert(display->priv->equation, "⁷");
return TRUE;
case GDK_KEY_8:
case GDK_KEY_KP_8:
math_equation_insert(display->priv->equation, "⁸");
return TRUE;
case GDK_KEY_9:
case GDK_KEY_KP_9:
math_equation_insert(display->priv->equation, "⁹");
return TRUE;
}
}
else if (state == GDK_MOD1_MASK || math_equation_get_number_mode(display->priv->equation) == SUBSCRIPT) {
switch(event->keyval)
{
case GDK_KEY_0:
case GDK_KEY_KP_0:
math_equation_insert(display->priv->equation, "₀");
return TRUE;
case GDK_KEY_1:
case GDK_KEY_KP_1:
math_equation_insert(display->priv->equation, "₁");
return TRUE;
case GDK_KEY_2:
case GDK_KEY_KP_2:
math_equation_insert(display->priv->equation, "₂");
return TRUE;
case GDK_KEY_3:
case GDK_KEY_KP_3:
math_equation_insert(display->priv->equation, "₃");
return TRUE;
case GDK_KEY_4:
case GDK_KEY_KP_4:
math_equation_insert(display->priv->equation, "₄");
return TRUE;
case GDK_KEY_5:
case GDK_KEY_KP_5:
math_equation_insert(display->priv->equation, "₅");
return TRUE;
case GDK_KEY_6:
case GDK_KEY_KP_6:
math_equation_insert(display->priv->equation, "₆");
return TRUE;
case GDK_KEY_7:
case GDK_KEY_KP_7:
math_equation_insert(display->priv->equation, "₇");
return TRUE;
case GDK_KEY_8:
case GDK_KEY_KP_8:
math_equation_insert(display->priv->equation, "₈");
return TRUE;
case GDK_KEY_9:
case GDK_KEY_KP_9:
math_equation_insert(display->priv->equation, "₉");
return TRUE;
}
}
return FALSE;
}
