add new image dialog (so set canvas size)

Author: unitycoder

PixelArtTool/MainWindow.xaml.cs

@@ -177,15 +177,17 @@ void Start()
             ResetCurrentBrightnessPreview(currentColor);
 
             // set pixel box size based on resolution
-            //rectPixelPos.Width = 16 * (16 / canvasResolutionX);
-            //rectPixelPos.Height = 16 * (16 / canvasResolutionY);
-            // r 8  = 32
-            // r 16 = 16
-            // r 32 = 8
+            rectPixelPos.Width = 16 * (16 / (float)canvasResolutionX);
+            rectPixelPos.Height = 16 * (16 / (float)canvasResolutionY);
 
             // hide some objects (that are visible at start to keep it easy to edit form)
             lineSymmetryXpositionA.Visibility = Visibility.Hidden;
             lineSymmetryXpositionB.Visibility = Visibility.Hidden;
+
+            // clear undos
+            undoStack.Clear();
+            redoStack.Clear();
+            currentUndoItem = null;
         }
 
 
@@ -655,12 +657,34 @@ void WindowMouseWheel(object sender, MouseWheelEventArgs e)
 
         private void OnClearButton(object sender, RoutedEventArgs e)
         {
-            RegisterUndo();
-            ClearImage(canvasBitmap, emptyRect, emptyPixels, emptyStride);
-            UpdateOutline();
-            // reset title
-            window.Title = windowTitle;
-            saveFile = null;
+            // show dialog for new resolution
+            NewImageDialog dlg = new NewImageDialog();
+            dlg.Owner = this;
+            var result = dlg.ShowDialog();
+            switch (result)
+            {
+                case true:
+                    RegisterUndo();
+                    ClearImage(canvasBitmap, emptyRect, emptyPixels, emptyStride);
+                    UpdateOutline();
+                    // reset title
+                    window.Title = windowTitle;
+                    saveFile = null;
+                    //Console.WriteLine(dlg.sliderResolution.Value);
+
+                    canvasResolutionX = (int)dlg.sliderResolution.Value;
+                    canvasResolutionY = (int)dlg.sliderResolution.Value;
+
+                    // re-init everything!!??
+                    Start();
+
+                    break;
+                case false: // cancelled
+                    break;
+                default:
+                    Console.WriteLine("Unknown error..");
+                    break;
+            }
         }
 
         // if unsaved, this is same as save as.., if already saved, then overwrite current

PixelArtTool/NewImageDialog.xaml

@@ -0,0 +1,23 @@
+<Window
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:PixelArtTool"
+        xmlns:System="clr-namespace:System;assembly=mscorlib" x:Class="PixelArtTool.NewImageDialog"
+        mc:Ignorable="d"
+        Title="New Image" Height="201" Width="281"
+		ResizeMode="NoResize"
+		ShowInTaskbar="False"
+		WindowStartupLocation="CenterOwner" 
+		>
+	<Grid>
+		<StackPanel Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="4">
+			<Label Content="Resolution *Use only 8x8, 16x16, 32x32, 64x64"/>
+			<TextBlock Text="{Binding ElementName=sliderResolution, Path=Value, StringFormat={}{0:#}}" HorizontalAlignment="Center" FontWeight="Bold"/>
+			<Slider x:Name="sliderResolution" Minimum="8" Maximum="64" SmallChange="8" TickFrequency="8" LargeChange="8" TickPlacement="Both" Value="16" AutoToolTipPlacement="TopLeft" IsSnapToTickEnabled="True"/>
+			<Button x:Name="okButton" IsDefault="True" Content="OK" Click="OnOkButtonClick"/>
+			<Button x:Name="cancelButton" IsCancel="True" Content="Cancel"/>
+		</StackPanel>
+	</Grid>
+</Window>

PixelArtTool/NewImageDialog.xaml.cs

@@ -0,0 +1,20 @@
+using System.Windows;
+
+namespace PixelArtTool
+{
+    /// <summary>
+    /// Interaction logic for Window1.xaml
+    /// </summary>
+    public partial class NewImageDialog : Window
+    {
+        public NewImageDialog()
+        {
+            InitializeComponent();
+        }
+
+        private void OnOkButtonClick(object sender, RoutedEventArgs e)
+        {
+            this.DialogResult = true;
+        }
+    }
+}

PixelArtTool/PixelArtTool.csproj

@@ -59,6 +59,9 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </ApplicationDefinition>
+    <Compile Include="NewImageDialog.xaml.cs">
+      <DependentUpon>NewImageDialog.xaml</DependentUpon>
+    </Compile>
     <Page Include="MainWindow.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
@@ -73,6 +76,10 @@
       <DependentUpon>MainWindow.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Page Include="NewImageDialog.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Properties\AssemblyInfo.cs">