Tool To Draw On Desktop
If you would like to attempt technical drawing in 3D, you need to be able to work with tools to do so. Here’s a list of Computer Aided Design software to consider: AutoCAD. Jun 18, 2013 Epic Pen is an open-source desktop application for Windows that’s designed with one purpose in mind: to let you draw anything, anywhere, on any window. While a tool like this might seem limited in terms of functionality, but it’s not quite so and can be genuinely useful under a myriad of usage scenarios.
HELP FILE
Use Drawing Tools (Desktop App)
Participants can use drawing tools to draw directly on the shared screen so that the marks are visible to all attendees. This allows participants to highlight areas of the screen, draw attention to certain parts and generally illustrate their point. Organizers and presenters can allow only other organizers or all attendees to draw on the shared screen.
Use drawing tools
- Click the Drawing Tools button in the Grab Tab.
- Use the menu to select the desired drawing tool (pen , highlighter , spotlight or arrow ). You can also change the pen color, if desired.
- Click and drag the mouse over your desktop to start drawing on the shared screen.
Enable/disable drawing tools for an individual
- Right-click or click the Arrow icon next to the participant's name in the People pane.
- Click Allow Drawing.
- When drawing tools are enabled for the user, a Check icon will appear next to Allow Drawing. The attendee will see a Draw icon in the Viewer menu; attendees can click and drag the mouse over the Viewer to make their drawings appear on the shared screen for all participants.
- When drawing tools are disabled for the user, the Check icon will disappear.
Erase all drawings
- Click the Drawing Tools button in the Grab Tab.
- Click Erase all drawings. All drawings done by any participant will immediately disappear.
Before you can draw lines and shapes, render text, or display and manipulate images with GDI+, you need to create a Graphics object. The Graphics object represents a GDI+ drawing surface, and is the object that is used to create graphical images.
Windows Desktop Tools
There are two steps in working with graphics:
Creating a Graphics object.
Using the Graphics object to draw lines and shapes, render text, or display and manipulate images.
Creating a Graphics Object
A graphics object can be created in a variety of ways.
To create a graphics object
Receive a reference to a graphics object as part of the PaintEventArgs in the Paint event of a form or control. This is usually how you obtain a reference to a graphics object when creating painting code for a control. Similarly, you can also obtain a graphics object as a property of the PrintPageEventArgs when handling the PrintPage event for a PrintDocument.
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Call the CreateGraphics method of a control or form to obtain a reference to a Graphics object that represents the drawing surface of that control or form. Use this method if you want to draw on a form or control that already exists.
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Create a Graphics object from any object that inherits from Image. This approach is useful when you want to alter an already existing image.
The following sections give details about each of these processes.
PaintEventArgs in the Paint Event Handler
When programming the PaintEventHandler for controls or the PrintPage for a PrintDocument, a graphics object is provided as one of the properties of PaintEventArgs or PrintPageEventArgs.
To obtain a reference to a Graphics object from the PaintEventArgs in the Paint event
Declare the Graphics object.
Assign the variable to refer to the Graphics object passed as part of the PaintEventArgs.
Insert code to paint the form or control.
The following example shows how to reference a Graphics object from the PaintEventArgs in the Paint event:
CreateGraphics Method
You can also use the CreateGraphics method of a control or form to obtain a reference to a Graphics object that represents the drawing surface of that control or form.
To create a Graphics object with the CreateGraphics method
Call the CreateGraphics method of the form or control upon which you want to render graphics.
Create from an Image Object
Additionally, you can create a graphics object from any object that derives from the Image class.
To create a Graphics object from an Image
Call the Graphics.FromImage method, supplying the name of the Image variable from which you want to create a Graphics object.
The following example shows how to use a Bitmap object:
Note
Tool To Draw On Desktop Screen
You can only create Graphics objects from nonindexed .bmp files, such as 16-bit, 24-bit, and 32-bit .bmp files. Each pixel of nonindexed .bmp files holds a color, in contrast to pixels of indexed .bmp files, which hold an index to a color table.
Drawing and Manipulating Shapes and Images
After it is created, a Graphics object may be used to draw lines and shapes, render text, or display and manipulate images. The principal objects that are used with the Graphics object are:
The Pen class—Used for drawing lines, outlining shapes, or rendering other geometric representations.
The Brush class—Used for filling areas of graphics, such as filled shapes, images, or text.
The Font class—Provides a description of what shapes to use when rendering text.
The Color structure—Represents the different colors to display.
Desktop Tools Free
To use the Graphics object you have created
Work with the appropriate object listed above to draw what you need.
For more information, see the following topics:
To render See Lines How to: Draw a Line on a Windows Form Shapes How to: Draw an Outlined Shape Text How to: Draw Text on a Windows Form Images How to: Render Images with GDI+