Make the settings panel resizable

You can now drag the bottom side of the panel to make it bigger or smaller.

Contributes to issue CURA-6054.

cura/CuraApplication.py

@@ -499,7 +499,7 @@ class CuraApplication(QtApplication):
         preferences.addPreference("cura/choice_on_profile_override", "always_ask")
         preferences.addPreference("cura/choice_on_open_project", "always_ask")
         preferences.addPreference("cura/use_multi_build_plate", False)
-
+        preferences.addPreference("view/settings_list_height", 600)
         preferences.addPreference("cura/currency", "€")
         preferences.addPreference("cura/material_settings", "{}")
 

resources/qml/PrintSetupSelector/Custom/CustomPrintSetup.qml

@@ -11,7 +11,6 @@ import Cura 1.0 as Cura
 Item
 {
     id: customPrintSetup
-    height: childrenRect.height + padding
 
     property real padding: UM.Theme.getSize("default_margin").width
     property bool multipleExtruders: extrudersModel.count > 1
@@ -98,15 +97,15 @@ Item
 
     Rectangle
     {
-        height: UM.Theme.getSize("print_setup_widget").height
         anchors
         {
             top: tabBar.visible ? tabBar.bottom : globalProfileRow.bottom
+            topMargin: -UM.Theme.getSize("default_lining").width
             left: parent.left
             leftMargin: parent.padding
             right: parent.right
             rightMargin: parent.padding
-            topMargin: -UM.Theme.getSize("default_lining").width
+            bottom: parent.bottom
         }
         z: tabBar.z - 1
         // Don't show the border when only one extruder

resources/qml/PrintSetupSelector/PrintSetupSelectorContents.qml

@@ -15,7 +15,7 @@ Item
     id: content
 
     width: UM.Theme.getSize("print_setup_widget").width - 2 * UM.Theme.getSize("default_margin").width
-    height: childrenRect.height
+    height: contents.height + buttonRow.height
 
     enum Mode
     {
@@ -71,6 +71,15 @@ Item
                 right: parent.right
                 top: parent.top
             }
+            height: UM.Preferences.getValue("view/settings_list_height") - UM.Theme.getSize("default_margin").height
+            Connections
+            {
+                target: UM.Preferences
+                onPreferenceChanged:
+                {
+                    customPrintSetup.height = UM.Preferences.getValue("view/settings_list_height");
+                }
+            }
             visible: currentModeIndex == PrintSetupSelectorContents.Mode.Custom
         }
     }
@@ -94,13 +103,14 @@ Item
 
         anchors
         {
-            top: buttonsSeparator.bottom
+            bottom: parent.bottom
             left: parent.left
             right: parent.right
         }
 
         Cura.SecondaryButton
         {
+            id: recommendedButton
             anchors.top: parent.top
             anchors.left: parent.left
             anchors.margins: parent.padding
@@ -125,5 +135,39 @@ Item
             visible: currentModeIndex == PrintSetupSelectorContents.Mode.Recommended
             onClicked: currentModeIndex = PrintSetupSelectorContents.Mode.Custom
         }
+
+        //Invisible area at the bottom with which you can resize the panel.
+        MouseArea
+        {
+            anchors
+            {
+                left: parent.left
+                right: parent.right
+                bottom: parent.bottom
+                top: recommendedButton.bottom
+                topMargin: UM.Theme.getSize("default_lining").height
+            }
+            cursorShape: Qt.SplitVCursor
+            visible: currentModeIndex == PrintSetupSelectorContents.Mode.Custom
+            drag
+            {
+                target: parent
+                axis: Drag.YAxis
+            }
+            onMouseYChanged:
+            {
+                if(drag.active)
+                {
+                    // position of mouse relative to dropdown  align vertical centre of mouse area to cursor
+                    //      v------------------------------v   v------------v
+                    var h = mouseY + buttonRow.y + content.y - height / 2 | 0;
+                    if(h < 200 * screenScaleFactor) //Enforce a minimum size.
+                    {
+                        h = 200 * screenScaleFactor;
+                    }
+                    UM.Preferences.setValue("view/settings_list_height", h);
+                }
+            }
+        }
     }
 }