Mfc lineto

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I'm learning MFC and I'm trying to draw some lines on a MFC Dialog-based application main window, it shall be a rather simple task but while running I see no lines drawing on the dialog. CClientDC on the other hand uses ::GetDC which can be used pretty much anywhere, as long as window handle is available.

mfc lineto

Learn more. Ask Question. Asked 4 years, 6 months ago. Active 4 years, 6 months ago. Viewed 1k times. Thanks for help! Edward Zhang. Edward Zhang Edward Zhang 61 11 11 bronze badges. Your code is fine. I was trying to upload a small demo project to this post. I've made it work by moving the DrawCorner call to the very beginning of the OnPaint method, i.

And then I can get the lines expected on dialog. Still open for who can answer why Your comments don't match your question.

Drawing a Line

By the way, avoid uploading your project and adding external links. Show Minimal, Complete, and Verifiable example instead. Thanks Michael for editing my post to make the question clear. Hi Barmak, The project I uploaded is actually a minimal project which contains no more than default generated MFC codes and my code pasted in this post, which can be run to verify this problem.

Thanks for sharing the link, very helpful.The Graphics object provides the DrawLine method, and the Pen object holds attributes of the line, such as color and width. The address of the Pen object is passed as an argument to the DrawLine method.

The following program, which draws a line from 0, 0 to, consists of three functions: WinMainWndProcand OnPaint. The OnPaint function receives a handle to a device context and passes that handle to a Graphics constructor.

The argument passed to the Pen constructor is a reference to a Color object. The four numbers passed to the color constructor represent the alpha, red, green, and blue components of the color. The alpha component determines the transparency of the color; 0 is fully transparent and is fully opaque. The four numbers passed to the DrawLine method represent the starting point 0, 0 and the ending pointof the line. Note the call to GdiplusStartup in the WinMain function.

GdiplusStartup fills that variable with a token that is later passed to the GdiplusShutdown function. The second parameter of the GdiplusStartup function is the address of a GdiplusStartupInput structure.

The preceding code relies on the default GdiplusStartupInput constructor to set the structure members appropriately. Skip to main content.

mfc lineto

Contents Exit focus mode. Is this page helpful? Yes No. Any additional feedback? Skip Submit.For more information on using CPensee Graphic Objects. This parameter in the first version of the constructor can be one of the following values:.

Valid only when the pen width is 1 or less, in device units. When this style is used with Windows GDI output functions that do not specify a bounding rectangle for example, the LineTo member functionthe drawing area of the pen is not limited by a frame. The second version of the CPen constructor specifies a combination of type, style, end cap, and join attributes. The values from each category should be combined by using the bitwise OR operator. The pen type can be one of the following values:.

The second version of the CPen constructor adds the following pen styles for nPenStyle :. This style is applicable only for cosmetic pens. If the join exceeds this limit, it is beveled. For the first version of the constructor, if this value is 0, the width in device units is always 1 pixel, regardless of the mapping mode. The first value specifies the length of the first dash in a user-defined style, the second value specifies the length of the first space, and so on.

If you use the constructor that takes arguments, then no further initialization is necessary. The constructor with arguments can throw an exception if errors are encountered, while the constructor with no arguments will always succeed. Creates a logical cosmetic or geometric pen with the specified style, width, and brush attributes, and attaches it to the CPen object. For a list of possible values, see the nPenStyle parameter in the CPen constructor. For the first version of CreatePenif this value is 0, the width in device units is always 1 pixel, regardless of the mapping mode.

The first version of CreatePen initializes a pen with the specified style, width, and color. The pen can be subsequently selected as the current pen for any device context. The second version of CreatePen initializes a logical cosmetic or geometric pen that has the specified style, width, and brush attributes. The width of a cosmetic pen is always 1; the width of a geometric pen is always specified in world units.

After an application creates a logical pen, it can select that pen into a device context by calling the CDC::SelectObject function. After a pen is selected into a device context, it can be used to draw lines and curves. A style unit is defined by the device in which the pen is used to draw a line.

When an application no longer requires a given pen, it should call the CGdiObject::DeleteObject member function or destroy the CPen object so the resource is no longer in use. An application should not delete a pen when the pen is selected in a device context.

Initializes a pen that has the style, width, and color given in the structure pointed to by lpLogPen. If a CPen object is not attached to the handle, a temporary CPen object is created and attached. This temporary CPen object is valid only until the next time the application has idle time in its event loop, at which time all temporary graphic objects are deleted. In other words, the temporary object is only valid during the processing of one window message.

For example, call GetExtLogPen to match the particular style of a pen. The following code example demonstrates calling GetExtLogPen to retrieve a pen's attributes, and then create a new, cosmetic pen with the same color. The following code example demonstrates calling GetLogPen to retrieve a pen character, and then create a new, solid pen with the same color. Skip to main content.U CanCode Software focuses on general application software development.

We provide complete solution for developers. Our product had been used by hundreds of top companies around the world!

Free you from not daring to use components because of unable to master the key technology of components! A line is a junction of two points. This means that a line has a beginning and an end:. In real life, before drawing, you should define where you would start. It comes in two versions that are:. The origin of a drawing is specified as a CPoint value. It comes it two versions declared as follows:. The end of a line can be defined by its horizontal x and its vertical measures y.

The last point of a line is not part of the line. The line ends just before reaching that point. Here is an example that draws a line starting at a point defined as 10, 22 coordinates and ending at64 :. You can use this property of the LineTo method to draw various lines. Here is an example:. Net Softwareall rights reserved. Other product and company names herein may be the trademarks of their respective owners.

Please direct your questions or comments to webmaster ucancode. MoveTo PtLine[0] ; dc. LineTo PtLine[1] ; dc. LineTo PtLine[2] ; dc.

CPen Class

LineTo PtLine[3] ; dc. LineTo PtLine[4] ; dc. LineTo PtLine[5] ; dc.Windows provides a variety of drawing tools to use in device contexts. It provides pens to draw lines, brushes to fill interiors, and fonts to draw text. MFC provides graphic-object classes equivalent to the drawing tools in Windows. A device context is a Windows data structure containing information about the drawing attributes of a device such as a display or a printer.

mfc lineto

All drawing calls are made through a device-context object, which encapsulates the Windows APIs for drawing lines, shapes, and text. Device contexts allow device-independent drawing in Windows.

Device contexts can be used to draw to the screen, to the printer, or to a metafile. The CDC object provides member functions to perform the basic drawing steps, as well as members for working with a display context associated with the client area of a window. Terminates the current print job, erasing everything the application has written to the device since the last call of the StartDoc member function.

Draws an elliptical arc. This function is similar to Arc, except that the current position is updated. Creates a memory-device context that is compatible with another device context. You can use it to prepare images in memory. Creates an information context for a specific device. This provides a fast way to get information about the device without creating a device context. Also detaches the device context. Accesses drawing capabilities of a video display that are not directly available through the graphics device interface GDI.

Allows applications to access facilities that are not directly available from a particular device through GDI. Also allows access to Windows escape functions. Escape calls made by an application are translated and sent to the device driver. Creates a new clipping region that consists of the existing clipping region minus the specified rectangle.The CDC object provides member functions for working with a device context, such as a display or printer, as well as members for working with a display context associated with the client area of a window.

Do all drawing through the member functions of a CDC object. The class provides member functions for device-context operations, working with drawing tools, type-safe graphics device interface GDI object selection, and working with colors and palettes.

It also provides member functions for getting and setting drawing attributes, mapping, working with the viewport, working with the window extent, converting coordinates, working with regions, clipping, drawing lines, and drawing simple shapes, ellipses, and polygons. Member functions are also provided for drawing text, working with fonts, using printer escapes, scrolling, and playing metafiles.

To use a CDC object, construct it, and then call its member functions that parallel Windows functions that use device contexts.

mfc lineto

Therefore, an int passed to a CDC member function must lie in the range to CClientDC manages a display context associated with a window's client area. CWindowDC manages a display context associated with an entire window, including its frame and controls. CMetaFileDC associates a device context with a metafile. CDC provides two member functions, GetLayout and SetLayoutfor reversing the layout of a device context, which does not inherit its layout from a window.

Such right-to-left orientation is necessary for applications written for cultures, such as Arabic or Hebrew, where the character layout is not the European standard.

LineTo function (wingdi.h)

For example, the framework uses these two device contexts to implement a CMetaFileDC object that will send output to a metafile while reading attributes from a physical device.

Print preview is implemented in the framework in a similar fashion. You can also use the two device contexts in a similar way in your application-specific code. The following pairs of functions provide this capability:. Terminates the current print job and erases everything the application has written to the device since the last call to the StartDoc member function. A value greater than or equal to 0 if successful, or a negative value if an error has occurred.

The following list shows common error values and their meanings:. Printing operations that do not specify an abort function using SetAbortProc.The use of non-parametric methods may be necessary when data have a ranking but no clear numerical interpretation, such as when assessing preferences.

In terms of levels of measurement, non-parametric methods result in "ordinal" data. As non-parametric methods make fewer assumptions, their applicability is much wider than the corresponding parametric methods. In particular, they may be applied in situations where less is known about the application in question.

Also, due to the reliance on fewer assumptions, non-parametric methods are more robust. Another justification for the use of non-parametric methods is simplicity. In certain cases, even when the use of parametric methods is justified, non-parametric methods may be easier to use.

Due both to this simplicity and to their greater robustness, non-parametric methods are seen by some statisticians as leaving less room for improper use and misunderstanding. Mathematical statistics has substantial overlap with the discipline of statistics.

Statistical theorists study and improve statistical procedures with mathematics, and statistical research often raises mathematical questions. Statistical theory relies on probability and decision theory. Mathematicians and statisticians like Gauss, Laplace, and C. New York: John Wiley and Sons. John Wiley and Sons, New York. Testing Statistical Hypotheses (2nd ed. Theory of Point Estimation (2nd ed.

VC++/C++ MFC tutorial 1: Creating a Dialog box for user input

Mathematical Statistics: Basic and Selected Topics. Asymptotic Methods in Statistical Decision Theory. Statistical Decision Theory: Estimation, Testing, and Selection. If you're seeing this message, it means we're having trouble loading external resources on our website. To log in and use all the features of Khan Academy, please enable JavaScript in your browser.

Statistical pocketbook Journal "Voprosy Statistiki" Additional information THE GREAT PATRIOTIC WAR. Anniversary statistical collection World Statistics Day 2015 BRICS Joint Statistical Publications Fundamental Principles of Official Statistics GLOSSARY 39, Miasnitskaya St.

Anniversary statistical collection World Statistics Day 2015 BRICS Joint Statistical Publications 39, Miasnitskaya St. Statistics is a form of mathematical analysis that uses quantified models, representations and synopses for a given set of experimental data or real-life studies.


thoughts on “Mfc lineto

Leave a Reply

Your email address will not be published. Required fields are marked *