TextButton reduces size of child?-CodePudding

I had implemented a column which has a padding of 16px horizontally, and a child container being one of the children. However, i wanted the whole container to be click-able so wrapped it with a TextButton, as a result its width shrunk somewhat, what can i do to restore it back to original while keeping the entire container as a Button?

Here is the code for the concerned widget:

Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16.0),
            child: Column(
              children: [
                Row(
                  children: [
                    Text("Add an item",
                        style: TextStyle(
                            color: Colors.black,
                            fontSize: 34,
                            fontWeight: FontWeight.w700,
                            letterSpacing: -1.5)),
                    Expanded(child: SizedBox(width: 1))
                  ],
                ),
                SizedBox(height: 16),
                TextButton(
                  child: Container(
                    width: double.infinity,
                    height: 460,
                    decoration: BoxDecoration(color: Colors.white),
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        Icon(
                          Icons.image_rounded,
                          color: Colors.grey.shade200,
                        ),
                      ],
                    ),
                  ),
                  onPressed: () {},
                )
              ],
            ),
          )

CodePudding user response：

Replace the TextButton with GestureDetector, like:

 Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16.0),
            child: Column(
              children: [
                Row(
                  children: [
                    Text("Add an item",
                        style: TextStyle(
                            color: Colors.black,
                            fontSize: 34,
                            fontWeight: FontWeight.w700,
                            letterSpacing: -1.5)),
                    Expanded(child: SizedBox(width: 1))
                  ],
                ),
                SizedBox(height: 16),
                GestureDetector(
                  child: Container(
                    width: double.infinity,
                    height: 460,
                    decoration: BoxDecoration(color: Colors.white),
                    child: Column(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        Icon(
                          Icons.image_rounded,
                          color: Colors.grey.shade200,
                        ),
                      ],
                    ),
                  ),
                  onTap:(){}
                )
              ],
            ),
          )

it would look something like: