B4J Question How to use a custom mouse cursor icon

ThRuST

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Licensed User
I'd like to change mouse cursor into a custom icon design and not the standard ones, is it possible to load a custom icon?

Here's the icon that I use and it's great on 3 large monitors. However I want to set it through code and not manually.

Btw you can use a plugin for Photoshop to load .ICO files and save it as .PNG

The Icon plugin for Photoshop can be found here

Attaching the Large arrow in PNG format
 

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jmon

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Licensed User
Hi,

You can do it like that:

B4X:
Sub SetCustomCursor(Dir As String, Filename As String, Width As Int, Height As Int, TargetNode As Node)
    Dim img As Image
    img.InitializeSample(Dir, Filename, Width, Height)
    Dim cursor As JavaObject
    cursor.InitializeNewInstance("javafx.scene.ImageCursor", Array(img))  
    Dim joScene As JavaObject = TargetNode  
    joScene.RunMethod("setCursor", Array(cursor))
End Sub
This code allows you to set the custom cursor on any node. :)

EDIT: Better Solution HERE (POST #7)
 

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ThRuST

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Licensed User
I love your cursors man, they are SUPERB. I would love to implement them in my project Athena if you don't mind :)
I should make it possible to change cursor in settings pane. Can't wait to get that working.
 

ThRuST

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Licensed User
I'll look into those icons and see if I can buy a few. All for one and one for all B4X B4X B4X B4X, we're growing a cult here lol :)
 

ThRuST

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Licensed User
I found this free Junior Icon editor and I cannot find a way how to set a hotspot. Please help me in this quest :)

Go here to boldly embark on the quest of the wholy icons lol
 

ThRuST

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Licensed User
About settings the hotspot, it's in the end of the textfile for the Photoshop ICON Plugin

If saving .CUR, note that the cursor hotspot is defined by the ruler origin.
Full text
To install

64-bit Windows (Vista/Windows 7):
Restart before installing;

put plugin in C:\Program Files\Adobe\Photoshop \Plug-Ins\File Formats.
If you are running on a 64-bit Windows system and are launching the 64-bit version of Photoshop CS4 or CS5, download the 64-bit version of the plugin and put it in the Plug-Ins folder corresponding to 64-bit Photoshop (i.e., the one in "Program Files" not "Program Files (x86)").
Move the plugin into the "File Formats" folder inside your Photoshop Plugins folder:
For Windows (32-bit), ICOFormat.8bi
For Windows (64-bit), ICOFormat64.8bi
For Mac OS X, ICOFormat.plugin (note that separate versions are provided for CS2, CS3/4 and CS5)
For Mac OS X/Classic, icoformat
For 68K MacOS, icoformat(68K)
If using Corel PSP Photo X2, put the plugin in C:\Program Files\Corel\Corel Paint Shop Pro Photo X2\Languages\EN\PlugIns
Quit and relaunch Photoshop, if it's already running.
To use the plugin
Use Photoshop's Open command (File menu) to open .ICO and .CUR files (which will now appear in the file browser)
Use Photoshop's Save command to create .ICO and .CUR files.
If saving .CUR, note that the cursor hotspot is defined by the ruler origin.
And here's how to set the Ruler in Photoshop..

Youtube
 
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ThRuST

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Licensed User
RealWorld Cursor editor has a bug that removes the toolbar completely, so please don't bother to use it.

I found this instead, an online cursor editor, seems much easier to use
https://www.cursor.cc/
 

ThRuST

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Licensed User
Thanks I will look into that. I found out that IcoFX is the king of icon editors, however as from what I experienced it couldn't set the hotspot for the PNG file I tried.
Not sure about the difference in those formats like ICO, CON, ANI since B4J uses PNG so if anyone has advice on this please share it. The hot spot is just important as the design itself, people will find out when they need it, as from yesterdays scouting for tutorials it was annoying to not find any software that could do this properly.
 
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jmon

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Licensed User
The size parameters doesn't seem to work?
Yeah you're right, I didn't notice.
The hot spot is just important as the design itself
There is an option for the hotspot too, but I don't really know how to use it, maybe it will make sense to you.
Try this (I changed the width/height to hotspotX/Y position):
B4X:
'Dir, 'Filename: Directory and filename of the cursor image.
'hotspotX, hotspotY: X and Y Position of the hotspot of the cursor (where the click happens).
'TargetNode: The node on which the cursor will be changed.
Sub SetCustomCursor(Dir As String, Filename As String, hotspotX  As Double, hotspotY  As Double, TargetNode As Node)
    Dim img As Image
    img.Initialize(Dir, Filename)
    Dim cursor As JavaObject
    cursor.InitializeNewInstance("javafx.scene.ImageCursor", Array(img, hotspotX, hotspotY))
    Dim joScene As JavaObject = TargetNode
    joScene.RunMethod("setCursor", Array(cursor))
End Sub
Edit: this is from JavaFX help:
ImageCursor
public ImageCursor(Image image,
double hotspotX,
double hotspotY)
Constructs an ImageCursor from the specified image and hotspot coordinates.
Parameters:
image - the image
hotspotX - the X coordinate of the cursor's hot spot
hotspotY - the Y coordinate of the cursor's hot spot
 
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jmon

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Licensed User
I don't really know how to use it, maybe it will make sense to you.
Ok, I get it now. For Example my PNG image is 500x500px. If you set :
B4X:
SetCustomCursor(File.DirAssets, "cursor.png", 250, 250, MainForm.RootPane)
Then the cursor hotspot (click position) will be centered in the image (500px / 2 = 250). So
B4X:
SetCustomCursor(File.DirAssets, "cursor.png", 500, 500, MainForm.RootPane)
will set it at the bottom right of the image. The default should be 0,0 then.
 

ThRuST

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Licensed User
@jmon Great. I have created my own arrow cursor for my project and it looks cool. The size is 200x300 but it looked twice as wide in my app and size parameters had no effect i.e 100, 100 so I'll lab with those values. Not sure what values that was used but it looked better. Personally I like those larger fancy styled icons even though taste is different so I should add in all kinds of styles to choose from. Not to seem picky, but a new source code example would be great to illustrate the hot spot in a cursor test app prefferably showing where the drawing takes place from the x, y position. The B4J community needs our very own cursor editor with the hot spot, yay!! :)
 

ThRuST

Well-Known Member
Licensed User
@jmon I have done some tests and your new code make wonders, the hot spot works as expected!! :) No need to call in the heavy artillery with us around lol
 
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