如何在 Qt 中引用 class 中的表单元素？
How can I refer to a form element from a class in Qt?
你好。
我正在写一个扫雷器。我需要从`My_PushButton` class 调用到`gridLayout_2`（*只是把它放在表单上，它不是动态创建的*），其中`的元素My_PushButton` class 被定位，因此如果用 LMB 单击“我的”（我的 - `My_PushButton` 的变量 `val` 中的值 9），停用 `gridLayout_2`,
从而结束游戏。
尝试了以下内容：
-
QWidget *form = QApplication::activeWindow();
form->blockSignals(true);
要么
form->setDisabled(true);
在这种情况下，window 被阻止，pushButton 按钮被阻止，在失败的情况下需要重新启动。
-
Ui::MainWindow *ui;
ui->gridLayout_2->setEnabled(false);
通过这种方法，我得到了“Segmentation Fault”错误，尽管理论上指针不是空的。
My_PushButton class:
class My_PushButton: public QPushButton{
Q_OBJECT
public:
//Ui::MainWindow *ui;
//QWidget *form = QApplication::activeWindow(); //A pointer to the active window (widget) in order to further access form elements through it
int val; //A variable that will store either the number of mines in the neighborhood, or the mine itself
My_PushButton(int val = 0): QPushButton(), val(val){
setFixedHeight(25);
setFixedWidth(25);
setIconSize(QSize(25, 24));
setStyleSheet("background-color: rgb(146, 36, 255)");
}
private slots:
void mousePressEvent(QMouseEvent *event){
if(event->button() == Qt::RightButton){
this->setIcon(QIcon(R"(C:\Qt\pictures/flag.png)"));
}
else{
if(val == 0) this->setStyleSheet("background-color: rgb(234, 223, 246)"), this->setIcon(QIcon());
if(val == 1) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("1");
if(val == 2) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("2");
if(val == 3) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("3");
if(val == 4) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("4");
if(val == 5) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("5");
if(val == 6) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("6");
if(val == 7) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("7");
if(val == 8) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("8");
if(val == 9){
this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon(R"(C:\Qt\pictures/bomb.png)"));
//form->blockSignals(true);
//form->setDisabled(true);
//ui->gridLayout_2->setEnabled(true);
}
}
}
signals:
void rightClicked();
void leftClicked();
protected:
void mouseReleaseEvent(QMouseEvent* event){
if(event->button() == Qt::RightButton){
emit rightClicked();
}
else{
emit leftClicked();
}
}
};
包含 `My_PushButton` 的整个 mainwindow.cpp 文件：
```
#include "./ui_mainwindow.h"
#include "mainwindow.h"
#include <iostream>
#include <QTextBrowser>
#include <QPushButton>
#include <QVariant>
#include <time.h>
#include <QLayout>
#include <QMouseEvent>
#include <QObject>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
class My_PushButton: public QPushButton{
Q_OBJECT
public:
//Ui::MainWindow *ui;
//QWidget *form = QApplication::activeWindow(); //A pointer to the active window (widget) in order to further access form elements through it
int val; //A variable that will store either the number of mines in the neighborhood, or the mine itself
My_PushButton(int val = 0): QPushButton(), val(val){
setFixedHeight(25);
setFixedWidth(25);
setIconSize(QSize(25, 24));
setStyleSheet("background-color: rgb(146, 36, 255)");
}
private slots:
void mousePressEvent(QMouseEvent *event){
if(event->button() == Qt::RightButton){
this->setIcon(QIcon(R"(C:\Qt\pictures/flag.png)"));
}
else{
if(val == 0) this->setStyleSheet("background-color: rgb(234, 223, 246)"), this->setIcon(QIcon());
if(val == 1) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("1");
if(val == 2) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("2");
if(val == 3) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("3");
if(val == 4) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("4");
if(val == 5) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("5");
if(val == 6) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("6");
if(val == 7) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("7");
if(val == 8) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("8");
if(val == 9){
this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon(R"(C:\Qt\pictures/bomb.png)"));
//form->blockSignals(true);
//form->setDisabled(true);
//ui->gridLayout_2->setEnabled(true);
}
}
}
signals:
void rightClicked();
void leftClicked();
protected:
void mouseReleaseEvent(QMouseEvent* event){
if(event->button() == Qt::RightButton){
emit rightClicked();
}
else{
emit leftClicked();
}
}
};
#include "mainwindow.moc"
void MainWindow::on_action_triggered()
{
QTextBrowser *tb = new QTextBrowser(); //Create a window with game rules
tb->setFixedSize(610, 150);
tb->setText("Use the left click button on the mouse to select a space on the grid.\n"
"If you hit a bomb, you lose.\n"
"The numbers on the board represent how many bombs are adjacent to a square.\n"
"For example, if a square has a \"3\" on it, then there are 3 bombs next to that square.\n"
"The bombs could be above, below, right and (or) left, or diagonal to the square.\n"
"Avoid all the bombs and expose all the empty spaces to win Minesweeper.\n"
"You can right click a square with the mouse to place a flag where you think a bomb is. This allows you to avoid that spot.");
tb->setEnabled(true);
tb->setVisible(true);
}
My_PushButton** my_rand(int size){
/*************************************************************
* The following values will be used to customize the cells: *
* 0 - empty cell; *
* 1 - cell showing the number of mines around it = 1; *
* 2 - cell showing the number of mines around it = 2; *
* 3 - cell showing the number of mines around it = 3; *
* 4 - cell showing the number of mines around it = 4; *
* 5 - cell showing the number of mines around it = 5; *
* 6 - cell,showing the number of mines around it = 6; *
* 7 - cell showing the number of mines around it = 7; *
* 8 - cell showing the number of mines around it = 8; *
* 9 - mine cell; *
*************************************************************/
srand(time(NULL));
int counter = 0, numines = (rand() % ((size * size) / 2)) + 1, x = 0, y = 0; //numines - number of mines, x & y - coordinates for placing a mine
My_PushButton **but; //Create a 2D array and fill it with 0
but = new My_PushButton*[size];
for(int i = 0; i < size; ++i){
but[i] = new My_PushButton[size];
}
while(numines > 0){ //Placing mines
x = rand() % size, y = rand() % size;
if(but[x][y].val != 9){
but[x][y].val = 9;
numines --;
}
}
//Checking neighbors for mines
for(int i = 1; i < size - 1; ++i){ //Checking an area without borders
for(int j = 1; j < size - 1; ++j){
if(but[i][j].val != 9){
if(but[i - 1][j - 1].val == 9) ++counter;
if(but[i - 1][j].val == 9) ++counter;
if(but[i - 1][j + 1].val == 9) ++counter;
if(but[i][j - 1].val == 9) ++counter;
if(but[i][j + 1].val == 9) ++counter;
if(but[i + 1][j - 1].val == 9) ++counter;
if(but[i + 1][j].val == 9) ++counter;
if(but[i + 1][j + 1].val == 9) ++counter;
}
if(counter > 0) but[i][j].val = counter;
counter = 0;
}
}
for (unsigned int i = 0; i < size; ++i) { //upper border
for (unsigned int j = 0; j < size; ++j) {
if (but[i][j].val != 9) {
if (i == 0 && j == 0) {
if (but[i][j + 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (but[i + 1][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == 0 && j == size - 1) {
if (but[i][j - 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (but[i + 1][j - 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == 0 && (j > 0 && j < size - 1)) {
if (but[i][j - 1].val == 9) ++counter;
if (but[i][j + 1].val == 9) ++counter;
if (but[i + 1][j - 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (but[i + 1][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == size - 1 && j == 0) { //lower border
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j + 1].val == 9) ++counter;
if (but[i][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == size - 1 && j == size - 1) {
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j - 1].val == 9) ++counter;
if (but[i][j - 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == size - 1 && (j > 0 && j < size - 1)) {
if (but[i][j - 1].val == 9) ++counter;
if (but[i - 1][j - 1].val == 9) ++counter;
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j + 1].val == 9) ++counter;
if (but[i][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (j == 0 && (i > 0 && i < size - 1)) { //left border
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j + 1].val == 9) ++counter;
if (but[i][j + 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (but[i + 1][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (j == size - 1 && (i > 0 && i < size - 1)) { //right border
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j - 1].val == 9) ++counter;
if (but[i][j - 1].val == 9) ++counter;
if (but[i + 1][j - 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
}
}
}
return but;
}
void MainWindow::on_pushButton_pressed()
{
QVariant index_but = ui->comboBox->currentIndex(); //Find out the value selected in the ComboBox
int a = index_but.toInt();
switch(a){
case 0: //number of buttons = 10
{
My_PushButton** but = my_rand(10);
for(int i = 0; i < 10; ++i){
for(int j = 0; j < 10; ++j){
ui->gridLayout_2->addWidget(&but[i][j], i, j);
}
}
ui->gridLayout_2->setSpacing(0);
ui->gridLayout_2->setSizeConstraint(QLayout::SetFixedSize);
/*for(int i = 0; i < 5; ++i){
delete [] but[i];
}
delete but;*/
break;
}
case 1: //number of buttons = 17
break;
case 2: //number of buttons = 25
break;
case 3: //self-entry
break;
default:
break;
}
}
Mainwindow.ui 文件:
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="enabled">
<bool>true</bool>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>650</width>
<height>800</height>
</rect>
</property>
<property name="minimumSize">
<size>
<width>649</width>
<height>770</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>1000</width>
<height>1000</height>
</size>
</property>
<property name="windowTitle">
<string>Minesweeper</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QWidget" name="horizontalLayoutWidget">
<property name="geometry">
<rect>
<x>10</x>
<y>10</y>
<width>157</width>
<height>41</height>
</rect>
</property>
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<widget class="QComboBox" name="comboBox">
<property name="editable">
<bool>false</bool>
</property>
<property name="currentText">
<string>Level 1</string>
</property>
<item>
<property name="text">
<string>Level 1</string>
</property>
</item>
<item>
<property name="text">
<string>Level 2</string>
</property>
</item>
<item>
<property name="text">
<string>Level 3</string>
</property>
</item>
<item>
<property name="text">
<string>Self-entry</string>
</property>
</item>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton">
<property name="text">
<string>Start</string>
</property>
</widget>
</item>
</layout>
</widget>
<widget class="QWidget" name="gridLayoutWidget">
<property name="geometry">
<rect>
<x>10</x>
<y>90</y>
<width>601</width>
<height>541</height>
</rect>
</property>
<layout class="QGridLayout" name="gridLayout_2"/>
</widget>
</widget>
<widget class="QStatusBar" name="statusbar"/>
<widget class="QMenuBar" name="menubar">
<property name="enabled">
<bool>true</bool>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>650</width>
<height>21</height>
</rect>
</property>
<widget class="QMenu" name="menuMinesweeper">
<property name="enabled">
<bool>true</bool>
</property>
<property name="title">
<string>Menu</string>
</property>
<addaction name="action"/>
<addaction name="separator"/>
<addaction name="actionNotes"/>
</widget>
<addaction name="menuMinesweeper"/>
</widget>
<action name="action">
<property name="text">
<string>Rules of the game</string>
</property>
</action>
<action name="actionNotes">
<property name="text">
<string>Notes</string>
</property>
</action>
</widget>
<resources/>
<connections/>
</ui>
`UPD`:
我做了什么？在 `MainWindow` class 中添加了一个 getter -
Ui::MainWindow *getPointer(){ return ui; }
即 returns 指向表单的指针。在 My_PushButton class 中，我添加了一个从 MainWindow -
获取 getter 的指针
MainWindow m;
Ui::MainWindow *form = m.getPointer();
，现在我可以引用所需的表单对象 - form->gridLayout_2->setEnabled(false);，但不需要更改该对象。
getter 当然有一个 public 访问修饰符。
可以像 drescherjm 所说的那样做，但由于进一步的障碍，我不得不采用一个指向表单的全局指针，并通过它对对象进行必要的操作。是的，我知道这种方法不是很可取，但对我自己（训练）来说它可以。
正如 Sergey Tatarincev（在 post https://ru.whosebug.com/a/1330855/460029 中）所说 - 这也有效。感谢大家。
你好。
我正在写一个扫雷器。我需要从`My_PushButton` class 调用到`gridLayout_2`（*只是把它放在表单上，它不是动态创建的*），其中`的元素My_PushButton` class 被定位，因此如果用 LMB 单击“我的”（我的 - `My_PushButton` 的变量 `val` 中的值 9），停用 `gridLayout_2`, 从而结束游戏。
尝试了以下内容：
-
QWidget *form = QApplication::activeWindow();
要么form->blockSignals(true);
在这种情况下，window 被阻止，form->setDisabled(true);pushButton按钮被阻止，在失败的情况下需要重新启动。 -
Ui::MainWindow *ui;
通过这种方法，我得到了“Segmentation Fault”错误，尽管理论上指针不是空的。ui->gridLayout_2->setEnabled(false);
My_PushButton class:
class My_PushButton: public QPushButton{
Q_OBJECT
public:
//Ui::MainWindow *ui;
//QWidget *form = QApplication::activeWindow(); //A pointer to the active window (widget) in order to further access form elements through it
int val; //A variable that will store either the number of mines in the neighborhood, or the mine itself
My_PushButton(int val = 0): QPushButton(), val(val){
setFixedHeight(25);
setFixedWidth(25);
setIconSize(QSize(25, 24));
setStyleSheet("background-color: rgb(146, 36, 255)");
}
private slots:
void mousePressEvent(QMouseEvent *event){
if(event->button() == Qt::RightButton){
this->setIcon(QIcon(R"(C:\Qt\pictures/flag.png)"));
}
else{
if(val == 0) this->setStyleSheet("background-color: rgb(234, 223, 246)"), this->setIcon(QIcon());
if(val == 1) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("1");
if(val == 2) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("2");
if(val == 3) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("3");
if(val == 4) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("4");
if(val == 5) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("5");
if(val == 6) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("6");
if(val == 7) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("7");
if(val == 8) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("8");
if(val == 9){
this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon(R"(C:\Qt\pictures/bomb.png)"));
//form->blockSignals(true);
//form->setDisabled(true);
//ui->gridLayout_2->setEnabled(true);
}
}
}
signals:
void rightClicked();
void leftClicked();
protected:
void mouseReleaseEvent(QMouseEvent* event){
if(event->button() == Qt::RightButton){
emit rightClicked();
}
else{
emit leftClicked();
}
}
};
包含 `My_PushButton` 的整个 mainwindow.cpp 文件：
```
#include "./ui_mainwindow.h"
#include "mainwindow.h"
#include <iostream>
#include <QTextBrowser>
#include <QPushButton>
#include <QVariant>
#include <time.h>
#include <QLayout>
#include <QMouseEvent>
#include <QObject>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
class My_PushButton: public QPushButton{
Q_OBJECT
public:
//Ui::MainWindow *ui;
//QWidget *form = QApplication::activeWindow(); //A pointer to the active window (widget) in order to further access form elements through it
int val; //A variable that will store either the number of mines in the neighborhood, or the mine itself
My_PushButton(int val = 0): QPushButton(), val(val){
setFixedHeight(25);
setFixedWidth(25);
setIconSize(QSize(25, 24));
setStyleSheet("background-color: rgb(146, 36, 255)");
}
private slots:
void mousePressEvent(QMouseEvent *event){
if(event->button() == Qt::RightButton){
this->setIcon(QIcon(R"(C:\Qt\pictures/flag.png)"));
}
else{
if(val == 0) this->setStyleSheet("background-color: rgb(234, 223, 246)"), this->setIcon(QIcon());
if(val == 1) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("1");
if(val == 2) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("2");
if(val == 3) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("3");
if(val == 4) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("4");
if(val == 5) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("5");
if(val == 6) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("6");
if(val == 7) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("7");
if(val == 8) this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon()), this->setText("8");
if(val == 9){
this->setStyleSheet("background-color: rgb(209, 173, 245)"), this->setIcon(QIcon(R"(C:\Qt\pictures/bomb.png)"));
//form->blockSignals(true);
//form->setDisabled(true);
//ui->gridLayout_2->setEnabled(true);
}
}
}
signals:
void rightClicked();
void leftClicked();
protected:
void mouseReleaseEvent(QMouseEvent* event){
if(event->button() == Qt::RightButton){
emit rightClicked();
}
else{
emit leftClicked();
}
}
};
#include "mainwindow.moc"
void MainWindow::on_action_triggered()
{
QTextBrowser *tb = new QTextBrowser(); //Create a window with game rules
tb->setFixedSize(610, 150);
tb->setText("Use the left click button on the mouse to select a space on the grid.\n"
"If you hit a bomb, you lose.\n"
"The numbers on the board represent how many bombs are adjacent to a square.\n"
"For example, if a square has a \"3\" on it, then there are 3 bombs next to that square.\n"
"The bombs could be above, below, right and (or) left, or diagonal to the square.\n"
"Avoid all the bombs and expose all the empty spaces to win Minesweeper.\n"
"You can right click a square with the mouse to place a flag where you think a bomb is. This allows you to avoid that spot.");
tb->setEnabled(true);
tb->setVisible(true);
}
My_PushButton** my_rand(int size){
/*************************************************************
* The following values will be used to customize the cells: *
* 0 - empty cell; *
* 1 - cell showing the number of mines around it = 1; *
* 2 - cell showing the number of mines around it = 2; *
* 3 - cell showing the number of mines around it = 3; *
* 4 - cell showing the number of mines around it = 4; *
* 5 - cell showing the number of mines around it = 5; *
* 6 - cell,showing the number of mines around it = 6; *
* 7 - cell showing the number of mines around it = 7; *
* 8 - cell showing the number of mines around it = 8; *
* 9 - mine cell; *
*************************************************************/
srand(time(NULL));
int counter = 0, numines = (rand() % ((size * size) / 2)) + 1, x = 0, y = 0; //numines - number of mines, x & y - coordinates for placing a mine
My_PushButton **but; //Create a 2D array and fill it with 0
but = new My_PushButton*[size];
for(int i = 0; i < size; ++i){
but[i] = new My_PushButton[size];
}
while(numines > 0){ //Placing mines
x = rand() % size, y = rand() % size;
if(but[x][y].val != 9){
but[x][y].val = 9;
numines --;
}
}
//Checking neighbors for mines
for(int i = 1; i < size - 1; ++i){ //Checking an area without borders
for(int j = 1; j < size - 1; ++j){
if(but[i][j].val != 9){
if(but[i - 1][j - 1].val == 9) ++counter;
if(but[i - 1][j].val == 9) ++counter;
if(but[i - 1][j + 1].val == 9) ++counter;
if(but[i][j - 1].val == 9) ++counter;
if(but[i][j + 1].val == 9) ++counter;
if(but[i + 1][j - 1].val == 9) ++counter;
if(but[i + 1][j].val == 9) ++counter;
if(but[i + 1][j + 1].val == 9) ++counter;
}
if(counter > 0) but[i][j].val = counter;
counter = 0;
}
}
for (unsigned int i = 0; i < size; ++i) { //upper border
for (unsigned int j = 0; j < size; ++j) {
if (but[i][j].val != 9) {
if (i == 0 && j == 0) {
if (but[i][j + 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (but[i + 1][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == 0 && j == size - 1) {
if (but[i][j - 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (but[i + 1][j - 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == 0 && (j > 0 && j < size - 1)) {
if (but[i][j - 1].val == 9) ++counter;
if (but[i][j + 1].val == 9) ++counter;
if (but[i + 1][j - 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (but[i + 1][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == size - 1 && j == 0) { //lower border
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j + 1].val == 9) ++counter;
if (but[i][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == size - 1 && j == size - 1) {
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j - 1].val == 9) ++counter;
if (but[i][j - 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (i == size - 1 && (j > 0 && j < size - 1)) {
if (but[i][j - 1].val == 9) ++counter;
if (but[i - 1][j - 1].val == 9) ++counter;
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j + 1].val == 9) ++counter;
if (but[i][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (j == 0 && (i > 0 && i < size - 1)) { //left border
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j + 1].val == 9) ++counter;
if (but[i][j + 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (but[i + 1][j + 1].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
if (j == size - 1 && (i > 0 && i < size - 1)) { //right border
if (but[i - 1][j].val == 9) ++counter;
if (but[i - 1][j - 1].val == 9) ++counter;
if (but[i][j - 1].val == 9) ++counter;
if (but[i + 1][j - 1].val == 9) ++counter;
if (but[i + 1][j].val == 9) ++counter;
if (counter > 0) but[i][j].val = counter, counter = 0;
}
}
}
}
return but;
}
void MainWindow::on_pushButton_pressed()
{
QVariant index_but = ui->comboBox->currentIndex(); //Find out the value selected in the ComboBox
int a = index_but.toInt();
switch(a){
case 0: //number of buttons = 10
{
My_PushButton** but = my_rand(10);
for(int i = 0; i < 10; ++i){
for(int j = 0; j < 10; ++j){
ui->gridLayout_2->addWidget(&but[i][j], i, j);
}
}
ui->gridLayout_2->setSpacing(0);
ui->gridLayout_2->setSizeConstraint(QLayout::SetFixedSize);
/*for(int i = 0; i < 5; ++i){
delete [] but[i];
}
delete but;*/
break;
}
case 1: //number of buttons = 17
break;
case 2: //number of buttons = 25
break;
case 3: //self-entry
break;
default:
break;
}
}
Mainwindow.ui 文件:
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="enabled">
<bool>true</bool>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>650</width>
<height>800</height>
</rect>
</property>
<property name="minimumSize">
<size>
<width>649</width>
<height>770</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>1000</width>
<height>1000</height>
</size>
</property>
<property name="windowTitle">
<string>Minesweeper</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QWidget" name="horizontalLayoutWidget">
<property name="geometry">
<rect>
<x>10</x>
<y>10</y>
<width>157</width>
<height>41</height>
</rect>
</property>
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<widget class="QComboBox" name="comboBox">
<property name="editable">
<bool>false</bool>
</property>
<property name="currentText">
<string>Level 1</string>
</property>
<item>
<property name="text">
<string>Level 1</string>
</property>
</item>
<item>
<property name="text">
<string>Level 2</string>
</property>
</item>
<item>
<property name="text">
<string>Level 3</string>
</property>
</item>
<item>
<property name="text">
<string>Self-entry</string>
</property>
</item>
</widget>
</item>
<item>
<widget class="QPushButton" name="pushButton">
<property name="text">
<string>Start</string>
</property>
</widget>
</item>
</layout>
</widget>
<widget class="QWidget" name="gridLayoutWidget">
<property name="geometry">
<rect>
<x>10</x>
<y>90</y>
<width>601</width>
<height>541</height>
</rect>
</property>
<layout class="QGridLayout" name="gridLayout_2"/>
</widget>
</widget>
<widget class="QStatusBar" name="statusbar"/>
<widget class="QMenuBar" name="menubar">
<property name="enabled">
<bool>true</bool>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>650</width>
<height>21</height>
</rect>
</property>
<widget class="QMenu" name="menuMinesweeper">
<property name="enabled">
<bool>true</bool>
</property>
<property name="title">
<string>Menu</string>
</property>
<addaction name="action"/>
<addaction name="separator"/>
<addaction name="actionNotes"/>
</widget>
<addaction name="menuMinesweeper"/>
</widget>
<action name="action">
<property name="text">
<string>Rules of the game</string>
</property>
</action>
<action name="actionNotes">
<property name="text">
<string>Notes</string>
</property>
</action>
</widget>
<resources/>
<connections/>
</ui>
`UPD`:
我做了什么？在 `MainWindow` class 中添加了一个 getter -
Ui::MainWindow *getPointer(){ return ui; }
即 returns 指向表单的指针。在 My_PushButton class 中，我添加了一个从 MainWindow -
MainWindow m;
Ui::MainWindow *form = m.getPointer();
，现在我可以引用所需的表单对象 - form->gridLayout_2->setEnabled(false);，但不需要更改该对象。
getter 当然有一个 public 访问修饰符。
可以像 drescherjm 所说的那样做，但由于进一步的障碍，我不得不采用一个指向表单的全局指针，并通过它对对象进行必要的操作。是的，我知道这种方法不是很可取，但对我自己（训练）来说它可以。 正如 Sergey Tatarincev（在 post https://ru.whosebug.com/a/1330855/460029 中）所说 - 这也有效。感谢大家。