CmdTrack

From MCS Wiki AVR
(Difference between revisions)
Jump to: navigation, search
(Created page with "= <span class="f_Header">Action</span> = Track touches for a graphics object. <span style="font-family: Arial;"> </span> <span style="font-family: Arial;"> </span...")
 
 
Line 102: Line 102:
  
 
<span style="font-weight: bold; color: rgb(128, 0, 128);">Note: see demo files for more examples</span>
 
<span style="font-weight: bold; color: rgb(128, 0, 128);">Note: see demo files for more examples</span>
 +
 +
<source lang="bascomavr">
 +
' Pseudocode
 +
 +
' Horizontal track of rectangle dimension 40x12 pixels and the present touch is at 50%
 +
ClearColorRGB 5, 45, 110
 +
ColorRGB 255, 168, 64
 +
Clear_B 1 ,1 ,1
 +
Begin_G RECTS
 +
Vertex2F 60 * 16, 50 * 16
 +
Vertex2F 100 * 16, 62 * 16
 +
ColorRGB 255, 0, 0
 +
Vertex2F 60 * 16,50 * 16
 +
Vertex2F 80 * 16,62 * 16
 +
ColorMask 0 ,0 ,0 ,0
 +
Tag 1
 +
Vertex2F 60 * 16,50 * 16
 +
Vertex2F 100 * 16,62 * 16
 +
CmdTrack 60 * 16, 50 * 16, 40, 12, 1
 +
</source>[[File:Clip0072.png|center|Clip0072.png]]
 +
 +
<source lang="bascomavr">
 +
' Circular track centered at (80,60) display location
 +
ClearColorRGB 5, 45, 110
 +
ColorRGB 255, 168, 64
 +
Clear_B 1 ,1 ,1
 +
Begin_G RECTS
 +
Vertex2F 70 * 16,40 * 16
 +
Vertex2F 82 * 16,80 * 16
 +
ColorRGB 255, 0, 0
 +
Vertex2F 70 * 16,40 * 16
 +
Vertex2F 82 * 16,60 * 16
 +
ColorMask 0 ,0 ,0 ,0
 +
Tag 1
 +
Vertex2F 70 * 16,40 * 16
 +
Vertex2F 82 * 16,80 * 16
 +
CmdTrack 70 * 16, 40 * 16, 12, 40, 1
 +
</source>[[File:Clip0073.png|center|Clip0073.png]]
 +
 +
<source lang="bascomavr">
 +
' To draw a dial with tag 33 centered at (80, 60), adjustable by touch
 +
angle = &H8000
 +
CmdTrack 80, 60, 1, 1, 33
 +
 +
Do
 +
Tag 33
 +
CmdDial 80, 60, 55, 0, angle
 +
.....
 +
tracker = Rd32(REG_TRACKER)
 +
If tracker AND 255 = 33 Then
 +
angle = tracker * 1000
 +
.....
 +
End If
 +
Loop
 +
</source>[[File:Clip0074.png|center|Clip0074.png]]
 +
 +
<source lang="bascomavr">
 +
' To make an adjustable slider with tag 34
 +
 +
val = &H8000
 +
CmdTrack 20, 50, 120, 8, 34
 +
Do
 +
...
 +
Tag 34
 +
CmdSlider 20, 50, 120, 8, val, 65535
 +
...
 +
tracker = Rd32(REG_TRACKER)
 +
If tracker AND 255 = 33 Then
 +
val = tracker * 1000
 +
End If
 +
...
 +
Loop
 +
</source>[[File:Clip0075.png|center|Clip0075.png]]
 +
 +
{{Languages}}
 +
 +
[[Category:FT800 Commands]]

Latest revision as of 20:33, 12 December 2014

Contents

Action

Track touches for a graphics object.

 

 

Syntax

CmdTrack x, y, w, h, tag

 

 

Remarks

x

For linear tracker functionality, x-coordinate of track area top-left, in pixels.

For rotary tracker functionality, x-coordinate of track area center, in pixels.

y

For linear tracker functionality, y-coordinate of track area top-left, in pixels.

For rotary tracker functionality, y-coordinate of track area center, in pixels.

w

Width of track area, in pixels.

h

Height of track area, in pixels.

A w and h of (1,1) means that the tracker is rotary, and reports an, angle value in REG_TRACKER.

A w and h of  (0,0) disables the track functionality of co-processor engine.

tag

tag of the graphics object to be tracked, 1-255

 

This command will enable co-processor engine to track the touch on the particular graphics object with one valid tag value assigned.  Then, co-processor engine will update the REG_TRACKER periodically with the frame rate of LCD display panel.

Co-processor engine tracks the graphics object in rotary tracker mode and linear tracker mode:

 

• Rotary tracker mode –  Track the angle between the touching point and the center of  graphics  object  specified  by  tag  value.

The value is in units of 1/65536 of a circle. 0 means that the angle is straight down, &H4000 left, &H8000 up, and &HC000 right

from the center.

 

• Linear tracker mode –  If parameter w is greater than h, track the relative distance of touching point to the width of graphics

object specified by tag value. If parameter w is not greater than h, Track the  relative distance of touching point to the height of graphics object specified by tag value. The value is in units of  1/65536 of the width or height of graphics object.

The distance of  touching point refers to the distance from the top left pixel of graphics object to the coordinate of touching point.

 

 

Example

 

Note: see demo files for more examples 

' Pseudocode
 
' Horizontal track of rectangle dimension 40x12 pixels and the present touch is at 50%
ClearColorRGB 5, 45, 110
ColorRGB 255, 168, 64
Clear_B 1 ,1 ,1
Begin_G RECTS
Vertex2F 60 * 16, 50 * 16
Vertex2F 100 * 16, 62 * 16
ColorRGB 255, 0, 0
Vertex2F 60 * 16,50 * 16
Vertex2F 80 * 16,62 * 16
ColorMask 0 ,0 ,0 ,0
Tag 1
Vertex2F 60 * 16,50 * 16
Vertex2F 100 * 16,62 * 16
CmdTrack 60 * 16, 50 * 16, 40, 12, 1
Clip0072.png
' Circular track centered at (80,60) display location
ClearColorRGB 5, 45, 110
ColorRGB 255, 168, 64
Clear_B 1 ,1 ,1
Begin_G RECTS
Vertex2F 70 * 16,40 * 16
Vertex2F 82 * 16,80 * 16
ColorRGB 255, 0, 0
Vertex2F 70 * 16,40 * 16
Vertex2F 82 * 16,60 * 16
ColorMask 0 ,0 ,0 ,0
Tag 1
Vertex2F 70 * 16,40 * 16
Vertex2F 82 * 16,80 * 16
CmdTrack 70 * 16, 40 * 16, 12, 40, 1
Clip0073.png
' To draw a dial with tag 33 centered at (80, 60), adjustable by touch
angle = &H8000
CmdTrack 80, 60, 1, 1, 33
 
Do
 Tag 33
 CmdDial 80, 60, 55, 0, angle
 .....
 tracker = Rd32(REG_TRACKER)
 If tracker AND 255 = 33 Then
 angle = tracker * 1000
 .....
 End If
Loop
Clip0074.png
' To make an adjustable slider with tag 34
 
val = &H8000
CmdTrack 20, 50, 120, 8, 34
Do
 ...
 Tag 34
 CmdSlider 20, 50, 120, 8, val, 65535
 ...
 tracker = Rd32(REG_TRACKER)
 If tracker AND 255 = 33 Then
 val = tracker * 1000
 End If
 ...
Loop
Clip0075.png
Languages   English  
Retrieved from "http://wiki.mcselec.com/bavr/index.php?title=CmdTrack&oldid=4870"
Personal tools
Namespaces
Variants
Actions
Navigation
Language