Moving between cells and editing

[Tschummel]

I really like your package but have two comments:

1. When navigating between the cells of the matrix the use of the arrow keys (up, down, left right) seems much more natural to me than using the combinations "shift enter" or "shift tab".
2. Since interactive input of matrix elements is the intended usage of the package I would expect that after navigating to a new cell this new cell is not only focused but also the current value selected so that a new value can be inserted immediately.

[Sijr73]

I could fix navigating between the cell of the matrix with the arrow keys in the javascript file of ShinyMatrix package.I edited the matrix-input.js file in both line 144-153, and replace this:
<td @mousedown="select" :class="{active: in_focus}"> <input ref="input" v-if="in_focus" v-model="input_value" @blur="update" v-on:keydown.down="next_row" v-on:keydown.up="previous_row" v-on:keydown.right="next_column" v-on:keydown.left="previous_column" v-focus onfocus="this.select();" onmouseup="return false;" /> <span v-else>{{ value }}</span> </td>

Also in line 215-221 for the header with this:
computed: { in_focus () { return this.focus.type == this.type && this.focus.i == this.i } }, <input ref="input" v-if="in_focus" v-model="input_value" @blur="update" v-on:keydown.down="next_row" v-on:keydown.up="previous_row" v-on:keydown.right="next_column" v-on:keydown.left="previous_column" v-focus onfocus="this.select();" onmouseup="return false;" />
that's it!

[aneudecker]

Thanks for your comments and suggestions. I will look into this.

Regarding your first suggestion: The main problem here is that we still want the left and right arrow when we are inside an input cell to navigate within the text or number. In spreadsheet programs there is a difference between "cell is selected" and "cursor is inside the cell". This then changes the behaviour of the arrow keys. It will be probably a bigger change to accomplish something like this in this package.

The second suggestion makes sense to me and should be quite easy to implement.