Selection menu graphical glitch (touchscreen mode)

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Can only use debug crash while a world is loaded, not in the main menu. I added a debug crash anyway though.

This one is odd. I see you have a resourcepack enabled, could you disable that and see if the issue persists?

The issue still persists, Would you like me to add another crash log without the resource pack enabled?

Nope, does it also happen on restart?

@Michael Wobst This is still an issue in 1.11.2. But I no longer sure this is a bug. Touchscreen mode was not designed for a mouse (obviously) and I don't have a touchscreen to test it with. If someone can confirm that this does not happen with touchscreens, then this should be closed as invalid. If it does happen with touchscreens, then it's still a bug.

Also, can a mod remove Untitled.png, as it doesn't relate to the bug.

Still an issue in 1.13.

Code analysis

Please link to this comment in the description.

The following is based on the decompiled version of Minecraft 1.13.

In net.minecraft.client.gui.GuiListWorldSelectionEntry

public void drawEntry(int listWidth, int slotHeight, int mouseX, int mouseY, boolean isSelected, float partialTicks)
{
    int y = this.getY();
    int x = this.getX();
    // ...
    if (this.client.gameSettings.touchscreen || isSelected)
    {
        // ...
        int j = mouseX - x;
        int i = j < 32 ? 32 : 0;

        if (this.worldSummary.markVersionInList())
        {
            Gui.drawModalRectWithCustomSizedTexture(x, y, 32.0F, (float)i, 32, 32, 256.0F, 256.0F);
            // ...
        }
        else
        {
            Gui.drawModalRectWithCustomSizedTexture(x, y, 0.0F, (float)i, 32, 32, 256.0F, 256.0F);
        }
    }
    // ...
}

It seems that whether the mouse is actually on the arrow is never checked.

Solution

In net.minecraft.client.gui.GuiListWorldSelectionEntry, net.minecraft.client.gui.ServerListEntryNormal and net.minecraft.client.resources.ResourcePackListEntryFound, check if the entry isSelected before rendering colored arrows.

Can confirm for 19w34a.

Still in 1.16.1 and 20w29a.