MAUI Draw line on canvas during runtime after button click

A

Aj Johnson

Guest
Aj Johnson Asks: MAUI Draw line on canvas during runtime after button click
I want to draw a new line in a GraphicsView after the click of a button. This will draw the line on startup but I would like to either redraw the current line or preferably add another line to the view.

Code:
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:controls="clr-namespace:CoachesToolbox.Controls"
xmlns:viewmodel="clr-namespace:CoachesToolbox.ViewModel"
xmlns:mct="http://schemas.microsoft.com/dotnet/2022/maui/toolkit"
xmlns:drawable="clr-namespace:CoachesToolbox.Models"
x:DataType="viewmodel:MainViewModel"
x:Class="CoachesToolbox.Views.MainPage"
Title="CoachesToolBox demos"
>
<ContentPage.Resources>
<drawable:Drawable x:Key="MyDrawable" />

</ContentPage.Resources>

Code:
<GraphicsView x:Name="Canvas"
HorizontalOptions="Fill"
VerticalOptions="Fill"
Drawable="{StaticResource MyDrawable}"
Grid.Column="1"
Grid.Row="0"
BackgroundColor="Transparent"/>

Code:
namespace CoachesToolbox.Models
{
public class Drawable : IDrawable
{
public void Draw(ICanvas canvas, RectF dirtyRect)
{
canvas.StrokeColor = Colors.Red;
canvas.StrokeSize = 5;
canvas.DrawLine(10, 10, 90, 100);
}
}
}

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Suppose A is a 4 by 5 matrix and s = (4,5,2,1,0) is the only special solution for Ax = 0. What is the exact row-reduced echelon from R of A? Can Ax = b be solved for all b?

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Maximum matching for bipartite graph with category restriction.

picker Asks: Maximum matching for bipartite graph with category restriction.
The general maximum matching on bipartite graphs is extracted as follows: We have a bipartite graph G, which contains two sets of vertices without any connections within the two sets and several connections between the two sets. We want to find the maximum matching (number of connections) where there are no two selected edges connected to the same vertex.

Consider the following restriction. If the vertices on the left-hand side ${X}$ have one or several specific label, e.g., $x_1 = 1, x_2 = 2, x_3 = 2, x_4 = {1 and 3} ...$

If we want to achieve that, finally, the match has uniform label distribution. How can we design the algorithm to calculate the maximum matching number?

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Apoorva Shukla Asks: Is the converse of Vertically opposite angles true?
When two straight lines intersect the vertically opposite angles are equal.

But, can we say that, if the vertically opposite angles of two lines are equal then the lines are straight?

The angles marked equal in orange, come after comparing the two congruent triangles, in the attached image.

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bosky2001 Asks: Intersection of conic sets
Question Prompt

How do I find the Intersection of C and C'?

and In addition to this, if I am given a set for C (C definition) , How do i construct the C' of it?

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the question

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SolveForum.com may not be responsible for the answers or solutions given to any question asked by the users. All Answers or responses are user generated answers and we do not have proof of its validity or correctness. Please vote for the answer that helped you in order to help others find out which is the most helpful answer. Questions labeled as solved may be solved or may not be solved depending on the type of question and the date posted for some posts may be scheduled to be deleted periodically. Do not hesitate to share your thoughts here to help others.

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JM3 Asks: Could a Legendre transform be equivalent to evaluation in a retarded time?
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being α and c positive constants, t a real variable 0 or positive, and p = dr/dt.

I would like to show that if we define

t'= t – r(t)/c

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where the prime ' stands for evaluated at t'

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Best regards,

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