I'm wondering how would I adjust the slider to make the width wider then it is?
First image is an image of the current state.
The second image is an image of what I'm looking for..
The slider is a CSlierCtrl and I'm using mfc.
It sounds like you want CSliderCtrl::SetThumbLength().
Related
I'm working on openFrameworks and I want to set the transparency of an image in order to modify it when I press a button, but I don't know how to implement this parameter.
In which way can I change this value? Is there a particular function to manage the transparency of an image?
check out http://openframeworks.cc/ofBook/chapters/intro_to_graphics.html
ofEnableAlphaBlending();
ofSetColor(255,0,0,127); # this would be a 50% transparent red color
ofDrawRectangle(20,20,100,100);
ofDisableAlphaBlending();
I want to increase the size of my tooltip as i want to insert an image as background to my tooltip. I am able to apply an image to my tooltip but the problem is the size of the tooltip being small only the upper part of the image is being displayed.
I am displaying image using Graphics Draw Image function. And I want the tooltip to take original size of an image without creating a rectangle as I tried all already.
I don't want to create my own tooltip. Just increase size of existing one.
I resolved it!! Just needed to add spaces on the property Tool tip on mytooltip on that control on which tool tip is used.Here i have used tool tip on my buttons.
i've implemented a owner draw button into my win32 app (no MFC). The button is a normal 20x20 bitmap (round icon with transparency). The problem is that the button is positioned on a solid background and i can see the buttons gray background (since the bitmap is round). I've tried responding to WM_CTLCOLORBTN with NULL_BRUSH but no luck.. I've tried displaying the button using a bitmap and a ico file but wont budge.. Does anyone know how to solve this problem?
This is my problem, the settings icon should be transparent at the edges (not white/gray)
It sounds like you're trying to make a non-rectangular control.
You could call SetWindowRgn to tell Windows that your control is non-rectangular.
In addition to what #joel's answer, if you want to make some area transperant put a unique color in the area where you want to have transperancy using some image editors (RGB(0xFF,0x00,0xFF)) is mostly used Then use TransperantBlt
You say it's a solid background but your image shows some kind of orange-yellow gradient as a background. If it really was a standard windows button solid color you can load the bitmap with LoadImage using the LR_LOADMAP3DCOLORS or LR_LOADTRANSPARENT. Since you have a gradient you'll have to use a more complicated technique to mask out the bitmap.
http://www.winprog.org/tutorial/transparency.html
I have a dialog (there are 3 edit controls in order to display 3 color channels RGB), I use openCV to open an image in a new form. What I want is when I move the mouse to any point on the image, each of the RGB color values will be shown in 3 edit boxed (on the dialog). How can I do that?
Thanks!!!
Perhaps this will help:
OpenCV rgb value for cv::Point in cv::Mat
To get the current cursor position you can use GetCursorPos and eventually ScreenToClient functions.
I've been using label to display images. I'd like to be able to click and create a bounding box then be able to drag the cursor to move around in the image. What would I need to do this? Thanks.
I'm not 100% sure I understand what you are trying to do, but I think the QGraphicsScene is what you are looking for. You can (among many other things):
Render images (QGraphicsPixmapItem, for example)
Change the zoom level when rendering the scene on a QGraphicsView.
Select things using a "rubber band"
Move items around with the mouse (see QGraphicsItem::ItemIsMovable)
etc.
You may need to get familiar with Qt's graphics view framework.