public void Clipping()
{
IVwGraphicsWin32 vwGraphics = VwGraphicsWin32Class.Create();
Assert.IsNotNull(vwGraphics);
using (var gr = new GraphicsObjectFromImage())
{
// start with a blue background.
using (var blueBrush = new SolidBrush(Color.Blue))
{
gr.Graphics.FillRectangle(blueBrush, new Rectangle(0, 0, 1000, 1000));
// Check that filling with a blue brush worked.
Assert.IsTrue(ColorCompare(gr.Bitmap.GetPixel(500, 500), Color.Blue));
//
// Check that drawing using a VwGraphics works.
//
vwGraphics.Initialize(gr.Graphics.GetHdc());
vwGraphics.PushClipRect(new Utils.Rect(0, 0, 1000, 1000));
vwGraphics.BackColor = ConvertToVwGraphicsColor(Color.Red);
vwGraphics.DrawRectangle(0, 0, 1000, 1000);
vwGraphics.PopClipRect();
vwGraphics.ReleaseDC();
gr.Graphics.ReleaseHdc();
gr.Graphics.Flush();
// Check that drawing a red rectangle using the VwGraphics Interface worked
Assert.IsTrue(ColorCompare(gr.Bitmap.GetPixel(500, 500), Color.Red));
/////
// Check that VwGraphics doesn't draw outside its clip rect.
/////
vwGraphics.Initialize(gr.Graphics.GetHdc());
// make the clip rect not include the area we are going to draw to.
vwGraphics.PushClipRect(new Utils.Rect(100, 100, 200, 200));
// attempt to draw off the clip rect.
vwGraphics.BackColor = ConvertToVwGraphicsColor(Color.Green);
vwGraphics.DrawRectangle(400, 400, 600, 600);
vwGraphics.PopClipRect();
vwGraphics.ReleaseDC();
gr.Graphics.ReleaseHdc();
gr.Graphics.Flush();
// Check that the green rectangle didn't appear on screen.
Assert.IsTrue(!ColorCompare(gr.Bitmap.GetPixel(500, 500), Color.Green));
}
}
}
public void GetTextExtentWithEmptyString()
{
IVwGraphicsWin32 vwGraphics = VwGraphicsWin32Class.Create();
Assert.IsNotNull(vwGraphics);
using (var gr = new GraphicsObjectFromImage())
{
const int areaWidth = 1000;
const int areaHeight = 1000;
vwGraphics.Initialize(gr.Graphics.GetHdc());
vwGraphics.PushClipRect(new Utils.Rect(0, 0, areaWidth, areaHeight));
vwGraphics.ForeColor = ConvertToVwGraphicsColor(Color.Black);
int extentX;
int extentY;
vwGraphics.GetTextExtent(0, String.Empty, out extentX, out extentY);
Assert.That(extentX == 0, "extentX should equal 0");
Assert.That(extentY > 0, "extentY should be greater than 0");
vwGraphics.PopClipRect();
vwGraphics.ReleaseDC();
gr.Graphics.ReleaseHdc();
}
}
/// <summary>
/// Draw the text using the FieldWorks IVwGraphicsWin32 interface.
/// </summary>
/// <remarks>Only used with Mono</remarks>
private void DrawFwText(Graphics graphics, Rectangle cellBounds,
string text, DataGridViewCellStyle cellStyle, FwTextBoxColumn col)
{
Debug.Assert(Platform.IsMono, "This method is only needed on Mono");
if (String.IsNullOrEmpty(text))
{
return;
}
IntPtr hdc = graphics.GetHdc();
IVwGraphicsWin32 vg = VwGraphicsWin32Class.Create(); // actually VwGraphicsCairo
try
{
vg.Initialize(hdc);
var renderProps = GetRenderProps(cellStyle, col);
vg.SetupGraphics(ref renderProps);
int x;
int y;
GetLocationForText(cellBounds, (col.TextBoxControl.RightToLeft == RightToLeft.Yes),
vg, text, out x, out y);
vg.PushClipRect(cellBounds);
vg.DrawText(x, y, text.Length, text, 0);
vg.PopClipRect();
}
finally
{
vg.ReleaseDC();
graphics.ReleaseHdc(hdc);
}
}
public void ComplexClipping()
{
IVwGraphicsWin32 vwGraphics = VwGraphicsWin32Class.Create();
Assert.IsNotNull(vwGraphics);
using (var gr = new GraphicsObjectFromImage())
{
vwGraphics.Initialize(gr.Graphics.GetHdc());
// Test on a single push
int left, top, right, bottom;
vwGraphics.PushClipRect(new Utils.Rect(50, 60, 500, 510));
vwGraphics.GetClipRect(out left, out top, out right, out bottom);
Assert.AreEqual(50, left, "Left doesn't match");
Assert.AreEqual(60, top, "Top doesn't match");
Assert.AreEqual(500, right, "Right doesn't match");
Assert.AreEqual(510, bottom, "Bottom doesn't match");
// Test on a second push
vwGraphics.PushClipRect(new Utils.Rect(1, 1, 300, 310));
vwGraphics.GetClipRect(out left, out top, out right, out bottom);
Assert.AreEqual(50, left, "Left doesn't match");
Assert.AreEqual(60, top, "Top doesn't match");
Assert.AreEqual(300, right, "Right doesn't match");
Assert.AreEqual(310, bottom, "Bottom doesn't match");
vwGraphics.PopClipRect();
vwGraphics.GetClipRect(out left, out top, out right, out bottom);
Assert.AreEqual(50, left, "Left doesn't match");
Assert.AreEqual(60, top, "Top doesn't match");
Assert.AreEqual(500, right, "Right doesn't match");
Assert.AreEqual(510, bottom, "Bottom doesn't match");
vwGraphics.PopClipRect();
vwGraphics.GetClipRect(out left, out top, out right, out bottom);
Assert.AreEqual(0, left, "Left doesn't match");
Assert.AreEqual(0, top, "Top doesn't match");
Assert.AreEqual(1000, right, "Right doesn't match");
Assert.AreEqual(1000, bottom, "Bottom doesn't match");
vwGraphics.ReleaseDC();
gr.Graphics.ReleaseHdc();
}
}
public void GetClipRect()
{
IVwGraphicsWin32 vwGraphics = VwGraphicsWin32Class.Create();
Assert.IsNotNull(vwGraphics);
using (var gr = new GraphicsObjectFromImage())
{
vwGraphics.Initialize(gr.Graphics.GetHdc());
var rect1 = new Utils.Rect(0, 0, 1000, 1000);
var rect2 = new Utils.Rect(500, 500, 700, 700);
vwGraphics.PushClipRect(rect1);
int left, top, right, bottom;
vwGraphics.GetClipRect(out left, out top, out right, out bottom);
Assert.IsTrue(left == rect1.left, "First push failed: left");
Assert.IsTrue(right == rect1.right, "First push failed: right");
Assert.IsTrue(top == rect1.top, "First push failed: top");
Assert.IsTrue(bottom == rect1.bottom, "First push failed: bottom");
// try a second rectangle
vwGraphics.PushClipRect(rect2);
vwGraphics.GetClipRect(out left, out top, out right, out bottom);
Assert.IsTrue(left == rect2.left, "Second push failed: left");
Assert.IsTrue(right == rect2.right, "Second push failed: right");
Assert.IsTrue(top == rect2.top, "Second push failed: top");
Assert.IsTrue(bottom == rect2.bottom, "Second push failed: bottom");
vwGraphics.PopClipRect();
vwGraphics.PopClipRect();
vwGraphics.ReleaseDC();
gr.Graphics.ReleaseHdc();
}
}
public void LargeRectangles()
{
// EB/2011-02-08: this test is failing for me on Linux. Not sure if it should work
// or what (see FWNX-449). Test is failing in FillRectangle similar to the failure
// in the following comment
// https://www.jira.insitehome.org/browse/FWNX-449?focusedCommentId=108054&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-108054
IVwGraphicsWin32 vwGraphics = VwGraphicsWin32Class.Create();
Assert.IsNotNull(vwGraphics);
const int width = 1241;
const int height = 56080; // something bigger than MAX_IMAGE_SIZE (32767)
using (var gr = new GraphicsObjectFromImage(width, height))
{
// start with a blue background.
using (var blueBrush = new SolidBrush(Color.Blue))
{
gr.Graphics.FillRectangle(blueBrush, new Rectangle(0, 0, width, height));
// Check that filling with a blue brush worked.
Assert.IsTrue(ColorCompare(gr.Bitmap.GetPixel(width - 1, height - 1), Color.Blue));
/////
// Check that drawing using a VwGraphics works.
////
vwGraphics.Initialize(gr.Graphics.GetHdc());
vwGraphics.PushClipRect(new Utils.Rect(0, 0, width, height));
vwGraphics.BackColor = ConvertToVwGraphicsColor(Color.Red);
vwGraphics.DrawRectangle(0, 0, width, height);
vwGraphics.PopClipRect();
vwGraphics.ReleaseDC();
gr.Graphics.ReleaseHdc();
gr.Graphics.Flush();
// Check that drawing a red rectangle using the VwGraphics Interface worked
Assert.IsTrue(ColorCompare(gr.Bitmap.GetPixel(width - 1, height - 1), Color.Red));
}
}
}
internal void TestGetTextExtentHelper(string testString)
{
IVwGraphicsWin32 vwGraphics = VwGraphicsWin32Class.Create();
Assert.IsNotNull(vwGraphics);
using (var gr = new GraphicsObjectFromImage())
{
const int areaWidth = 500;
const int areaHeight = 500;
// start with a White background.
using (var blueBrush = new SolidBrush(Color.White))
{
gr.Graphics.FillRectangle(blueBrush, new Rectangle(0, 0, areaWidth, areaHeight));
Assert.AreEqual(-1, SearchForBottomMostNonWhitePixel(gr.Bitmap, areaWidth, areaHeight), "Should all be white #1");
Assert.AreEqual(-1, SearchForRightMostNonWhitePixel(gr.Bitmap, areaWidth, areaHeight), "Should all be white #2");
vwGraphics.Initialize(gr.Graphics.GetHdc());
vwGraphics.PushClipRect(new Utils.Rect(0, 0, areaWidth, areaHeight));
vwGraphics.ForeColor = ConvertToVwGraphicsColor(Color.Black);
int extentX;
int extentY;
vwGraphics.GetTextExtent(testString.Length, testString, out extentX, out extentY);
Assert.That(extentX > 0, "extentX should be greater than 0");
Assert.That(extentY > 0, "extentY should be greater than 0");
vwGraphics.DrawText(0, 0, testString.Length, testString, 0);
vwGraphics.PopClipRect();
vwGraphics.ReleaseDC();
gr.Graphics.ReleaseHdc();
gr.Graphics.Flush();
Assert.That(SearchForBottomMostNonWhitePixel(gr.Bitmap, areaWidth, areaHeight) <= extentY, String.Format("Should be <= {0}", extentY));
Assert.That(SearchForRightMostNonWhitePixel(gr.Bitmap, areaWidth, areaHeight) <= extentX, String.Format("Should be <= {0}", extentX));
}
}
}
public void TextClipping()
{
const string longString = "abcdefghijklmnopqrstuvwzyzabcdefghijklmnopqrstuvwzyzabcdefghijklmnopqrstuvwzyz";
IVwGraphicsWin32 vwGraphics = VwGraphicsWin32Class.Create();
Assert.IsNotNull(vwGraphics);
using (var gr = new GraphicsObjectFromImage())
{
const int areaWidth = 500;
const int areaHeight = 500;
const int clipLeft = 300;
const int clipRight = 400;
// start with a White background.
using (var blueBrush = new SolidBrush(Color.White))
{
gr.Graphics.FillRectangle(blueBrush, new Rectangle(0, 0, areaWidth, areaHeight));
Assert.AreEqual(-1, SearchForBottomMostNonWhitePixel(gr.Bitmap, areaWidth, areaHeight), "Should all be white #1");
Assert.AreEqual(-1, SearchForRightMostNonWhitePixel(gr.Bitmap, areaWidth, areaHeight), "Should all be white #2");
vwGraphics.Initialize(gr.Graphics.GetHdc());
vwGraphics.PushClipRect(new Utils.Rect(clipLeft, 0, clipRight, areaHeight));
vwGraphics.ForeColor = ConvertToVwGraphicsColor(Color.Black);
vwGraphics.DrawText(0, 0, longString.Length, longString, 0);
vwGraphics.PopClipRect();
vwGraphics.ReleaseDC();
gr.Graphics.ReleaseHdc();
gr.Graphics.Flush();
Assert.That(SearchForLeftMostNonWhitePixel(gr.Bitmap, areaWidth, areaHeight) >= clipLeft, String.Format("Should be >= {0}", clipLeft));
Assert.That(SearchForRightMostNonWhitePixel(gr.Bitmap, areaWidth, areaHeight) <= clipRight, String.Format("Should be <= {0}", clipRight));
}
}
}
