For this and all assignments until you are told otherwise: Treat the description here as a "software specification." Make sure you include exactly the features described. Don't add any features unless you have discussed them with the TA first.
From this assignment on: Always create a new subdirectory for the files associated with a new assignment, and always use a single project group for all parts of an assignment. The project group for this assignment should be called "Program3".
In this part of the assignment, you will assign system colors by using the appropriate SystemColorConstants in an assignment statement. Create a PictureBox approximately 2 inches wide by 1 inch tall, plus three CommandButtons.
Make each button change the color of the PictureBox. One button should change it to the Desktop, one to the ActiveTitleBar color, and one to the HighlightText color. Choose reasonable names for the objects and position them in an attractive arrangement.
Create a VB program that looks like the example provided. Include the following names and settings:
||picColored ||BackColor ||Black
||hsbRed ||Max ||255
||picRed ||BackColor ||Red
||lblRed ||Caption ||0
||hsbGreen ||Max ||255
||picGreen ||BackColor ||Green
||lblGreen ||Caption ||0
||hsbBlue ||Max ||255
||picBlue ||BackColor ||Blue
||lblBlue ||Caption ||0
You'll also need to declare three integer variables named Red, Green, and Blue to hold the RGB settings for the color being displayed. (Note that they are initialized automatically to the appropriate number, zero.) Use VB's RGB function to change the color of the rectangle whenever the user moves a slider (horizontal scrollbar). The label associated with that slider also changes, to show the decimal value.
As a model, here is the code for when the Red slider is moved.
Private Sub hsbRed_Change() Red = hsbRed.Value ' Change color shown in rectangle picColored.BackColor = RGB (Red, Green, Blue) lblRed.Caption = hsbRed.Value ' Update slider label End SubNote what happens when you run the program, click on the slider's "thumb" (the movable portion), then use the left-arrow or right-arrow key on your keyboard. How does VB decide how much to move the slider?
Download the BarChart program ( BarChart.vbp, BarChart.vbw, and frmBarChart.frm; or as a single file in www.engr.orst.edu/classes/cs/cs252/prog3/prog3.zip) by opening the links and then saving a copy of each file in your own directory. Note that the only thing you should be changing is the use of color -- no other portions of the code should be modified.
Apply colors to improve the usability of the interface. Your selections should
To think about: Why are the bars drawn starting at an X-coordinate of 0.5 rather than 0?
Turn in the whole project group as a single unit by using WinZip (available on all the CS NT's) to package up the entire directory into a single file for submission.