multisig wizard: use sliders

gui/qt/installwizard.py

@@ -352,32 +352,39 @@ class InstallWizard(QDialog, MessageBoxMixin, WizardBase):
 
     def query_multisig(self, action):
         cw = CosignWidget(2, 2)
-        m_edit = QSpinBox()
-        n_edit = QSpinBox()
-        m_edit.setValue(2)
-        n_edit.setValue(2)
+        m_edit = QSlider(Qt.Horizontal, self)
+        n_edit = QSlider(Qt.Horizontal, self)
         n_edit.setMinimum(2)
         n_edit.setMaximum(15)
         m_edit.setMinimum(1)
         m_edit.setMaximum(2)
-        n_edit.valueChanged.connect(m_edit.setMaximum)
+        n_edit.setValue(2)
+        m_edit.setValue(2)
 
-        n_edit.valueChanged.connect(cw.set_n)
-        m_edit.valueChanged.connect(cw.set_m)
-
-        hbox = QHBoxLayout()
-        hbox.addWidget(QLabel(_('Require')))
-        hbox.addWidget(m_edit)
-        hbox.addWidget(QLabel(_('of')))
-        hbox.addWidget(n_edit)
-        hbox.addWidget(QLabel(_('signatures')))
-        hbox.addStretch(1)
+        n_label = QLabel()
+        m_label = QLabel()
+        grid = QGridLayout()
+        grid.addWidget(n_label, 0, 0)
+        grid.addWidget(n_edit, 0, 1)
+        grid.addWidget(m_label, 1, 0)
+        grid.addWidget(m_edit, 1, 1)
+        def on_m(m):
+            m_label.setText(_('Require %d signatures')%m)
+            cw.set_m(m)
+        def on_n(n):
+            n_label.setText(_('From %d cosigners')%n)
+            cw.set_n(n)
+            m_edit.setMaximum(n)
+        n_edit.valueChanged.connect(on_n)
+        m_edit.valueChanged.connect(on_m)
+        on_n(2)
+        on_m(2)
 
         vbox = QVBoxLayout()
         vbox.addWidget(cw)
         vbox.addWidget(WWLabel(_("Choose the number of signatures needed "
                           "to unlock funds in your wallet:")))
-        vbox.addLayout(hbox)
+        vbox.addLayout(grid)
         self.set_main_layout(vbox, _("Multi-Signature Wallet"))
         m = int(m_edit.value())
         n = int(n_edit.value())