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use core:geometry;
/**
* Basic message dialog.
*
* Similar to MsgBox in Win32.
*/
class MessageDialog extends Dialog {
init(Str title, Str message) {
init(title) {
label(message);
padding = 8;
}
add(label);
}
// The message.
private Label label;
// Buttons.
private Button[] buttons;
// Padding in the dialog.
private Float padding;
// Compute minimum size.
Size minSize() : override {
Size msg = label.minSize;
Size buttonSz;
for (b in buttons) {
Size s = b.minSize();
buttonSz.h = max(buttonSz.h, s.h);
buttonSz.w += s.w + padding;
}
Size(max(msg.w, buttonSz.w) + 2*padding, msg.h + buttonSz.h + 3*padding);
}
// Update the contents on resize.
void resized(Size size) : override {
Size buttonSz;
Point pos(size.w, size.h - padding);
for (b in buttons) {
Size s = b.minSize();
buttonSz.h = max(buttonSz.h, s.h);
buttonSz.w += s.w + padding;
b.pos = Rect(Point(pos.x - s.w - padding, pos.y - s.h), s);
pos.x -= s.w + padding;
}
label.pos = Rect(padding, padding, size.w - padding, size.h - buttonSz.h - 2*padding);
}
// Add a button.
void addButton(Str text, Int result) {
var me = this;
Button b(text, () => me.close(result));
buttons << b;
add(b);
}
// Add the default button.
void addDefButton(Str text, Int result) {
var me = this;
Button b(text);
defaultChoice(b);
b.onClick = () => me.close(result);
buttons << b;
add(b);
}
}
/**
* Response from a message.
*/
enum MessageResponse {
ok, cancel, yes, no,
}
// Show a notification. I.e. a box with only OK.
void showMessage(Frame parent, Str title, Str message) on Ui {
MessageDialog d(title, message);
d.addDefButton("OK", 0);
d.show(parent);
}
// Show a yes-no question.
MessageResponse showYesNoQuestion(Frame parent, Str title, Str message, Str yes, Str no) on Ui {
MessageDialog d(title, message);
d.addButton(no, MessageResponse:no.v.int);
d.addDefButton(yes, MessageResponse:yes.v.int);
Int r = d.show(parent);
if (r < 0)
return MessageResponse:cancel;
MessageResponse(r.nat);
}
// Show a yes-no-cancel question.
MessageResponse showYesNoCancelQuestion(Frame parent, Str title, Str message, Str yes, Str no, Str cancel) on Ui {
MessageDialog d(title, message);
d.addButton(cancel, MessageResponse:cancel.v.int);
d.addButton(no, MessageResponse:no.v.int);
d.addDefButton(yes, MessageResponse:yes.v.int);
Int r = d.show(parent);
if (r < 0)
return MessageResponse:cancel;
MessageResponse(r.nat);
}
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