I am using following code to print graphics rectangle
var gr = XGraphics.FromPdfPage(1);
Color color = System.Drawing.Color.White;
var brush = new System.Drawing.SolidBrush(color);
gr.FillRectangle(brush, item.Position.X, item.Position.Y, item.Width, item.Height);
But when I execute above code there is border on that rectangle.That rectangle is in following image.
In this image border is showing when I execute above code, But is there any way so I can remove that border?
How does it look when you skip FillRectangle? I think the "border" is already there and your reactangle is just a little too small.
Related
Is there a quick way using System.Drawing to quickly enlarge the image canvas of an .png image? (see example below). The caveat is the background might be transparent and I want to keep it transparent.
Edit: Needs to be in ASP .Net CORE
Alternatively, is there a way of putting the image on a white background that is slightly larger than the image?
After a few days of trial and error, I think I found something that works
Image overlayImage = //get your image here from file or url.
xloc = //x coord where to start overlay image.
yloc = //y coord where to start overlay image.
canvasWidth = //width of background canvas
canvasHeight = //height of background canvas
Bitmap baseImage = new Bitmap(canvasWidth, canvasHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
using (Graphics graphics = Graphics.FromImage(baseImage))
{
using (System.Drawing.SolidBrush myBrush = new System.Drawing.SolidBrush(System.Drawing.Color.White))
{
graphics.FillRectangle(myBrush, new Rectangle(0, 0, canvasWidth, canvasHeight)); // white rectangle
}
graphics.CompositingMode = CompositingMode.SourceOver;
graphics.DrawImage(overlayImage, xloc, yloc);
} // graphics will be disposed at this line
I am trying to code a text editor from scratch in C++ using Qt/QML. For drawing the text I use a Canvas with a Context2D , which looks roughly like this:
function drawString(text, x, y, font) {
var ctx = getContext("2d");
ctx.font = font;
ctx.fillStyle = "black";
ctx.fillText(qsTr(text), x, y);
ctx.stroke();
}
In order to graphically represent a selected area, I want to invert the selecion, for instance place a black rectangle over an area and make the text white.
For this I will use ctx.globalCompositeOperation = "xor"
So the problem I ran into is: when I draw a text with the function above in black, and then afterwards paint the same text in the same location in white I would expect this canvas to be white again. Instead there is still some kind of outline of the text visible (like there is a shadow).
I already tried switching off all shadow parameters but it didn't solve my problem.
Here is a screenshot so you get a better idea of what it looks like:
Nevermind, I found the problem myself. The antialiasing property was set to true, which caused the effect. By setting it to false the text doesn't look as pretty but the shadow is gone.
I have a QMessagebox with a custom background image. Since there is some stuff on the top side of the background image I want to see, the text of the messagebox should be lowered. Does anybody know how I can do this? I already tried throwing in some white lines using br, so:
popup.setText("<font size =5 color =white ><br>""<br>""<br>""Are you sure you
want to erase the memory</font> ");
but this screws up the background picture. Is there any way I can move the "box" that contains the text to a lower position?
You could try to get the QMessageBox' layout, get the label which holds your text and increment the labels margin. This probably is a hack and might make your project unportable. Construct your QMessageBox, call hack and then exec the box.
void hack(QMessageBox* pMessageBox)
{
QGridLayout* grid = qobject_cast<QGridLayout*>(pMessageBox->layout());
if (grid)
{
QLabel* label = qobject_cast<QLabel*>((grid->itemAtPosition(0,1))->widget());
if (label)
{
label->setMargin(label->margin()+5); // whatever is suitable
}
}
}
I want to position a gtkButton on top of a gtkImage. I do this putting both inside a gtkFixed container. The problem now is that the button's tooltip is not shown anymore, when there is an image in the background. Without the image it works fine. How can I get the tooltip to be shown?
I am an R programmer so the below code is R-Gtk binding style, but should still convey the idea:
library(RGtk2)
w = gtkWindow()
image = gtkImage(file="tmp_1.png")
btn = gtkButton("Test")
gtkWidgetSetTooltipText(btn, "test")
fx = gtkFixed()
gtkFixedPut(fx, image, 10, 10)
gtkFixedPut(fx, btn, 10,10)
gtkContainerAdd(w, fx)
gtkWidgetShowAll(w)
Any ideas?
TIA.
You should use GtkOverlay widget. You add your GtkImage widget as main child of the overlay and the button with gtk_overlay_add_overlay.
That should work, and that's the preferred way of doing it.
I need to do some emulation of some old DOS or mainframe terminals in Flex. Something like the image below for example.
The different coloured text is easy enough, but the ability to do different background colours, such as the yellow background is beyond the capabilities of the standard Flash text.
I may also need to be able to enter text at certain places and scroll text up the "terminal". Any idea how I'd attack this? Or better still, any existing code/components for this sort of thing?
Use TextField.getCharBoundaries to get a rectangle of the first and last characters in the areas where you want a background. From these rectangles you can construct a rectangle that spans the whole area. Use this to draw the background in a Shape placed behind the text field, or in the parent of the text field.
Update you asked for an example, here is how to get a rectangle from a range of characters:
var firstCharBounds : Rectangle = textField.getCharBoundaries(firstCharIndex);
var lastCharBounds : Rectangle = textField.getCharBoundaries(lastCharIndex);
var rangeBounds : Rectangle = new Rectangle();
rangeBounds.topLeft = firstCharBounds.topLeft;
rangeBounds.bottomRight = lastCharBounds.bottomRight;
If you want to find a rectangle for a whole line you can do this instead:
var charBounds : Rectangle = textField.getCharBoundaries(textField.getLineOffset(lineNumber));
var lineBounds : Rectangle = new Rectangle(0, charBounds.y, textField.width, firstCharBounds.height);
When you have the bounds of the text range you want to paint a background for, you can do this in the updateDisplayList method of the parent of the text field (assuming the text field is positioned at [0, 0] and has white text, and that textRangesWithYellowBackground is an array of rectangles that represent the text ranges that should have yellow backgrounds):
graphics.clear();
// this draws the black background
graphics.beginFill(0x000000);
graphics.drawRect(0, 0, textField.width, textField.height);
graphics.endFill();
// this draws yellow text backgrounds
for each ( var r : Rectangle in textRangesWithYellowBackground )
graphics.beginFill(0xFFFF00);
graphics.drawRect(r.x, r.y, r.width, r.height);
graphics.endFill();
}
The font is fixed width and height, so making a background bitmap dynamically isn't difficult, and is probably the quickest and easiest solution. In fact, if you size it correctly there will only be one stretched pixel per character.
Color the pixel (or pixels) according to the background of the character.
-Adam