我想创建一个GtkWidget类型的10x20数组。我想让他们每个人都成为一个GtkEventBox,我将附上一个标签。
我应该如何创建和使用2D GtkWidget *数组?
这是我到目前为止所尝试的:
//global variable:
GtkWidget *labelPlate[ROWS][COLUMNS];
...
...
inside the function that creates the table and attaches the event boxes to it
//my table, where the EventBoxes will be attached to
GtkWidget *finalPlateTable = gtk_table_new (10, 20, TRUE);
int i, j;
for(i = 0; i<ROWS; i++){
for(j=0 ; j<COLUMNS; j++){
//Make a char with the current float and create a label with it.
char finalString[14];
sprintf(finalString, "%.2f", plate[i][j]);
GtkWidget *label = gtk_label_new(finalString);;
//Labels cannot have bg color, so attach each label to an event box
/*HERE I GET SEG FAULT*/
labelPlate[i][j]=gtk_event_box_new();
//adding the label to my eventbox
gtk_container_add(GTK_CONTAINER(labelPlate[i][j]), label);
//Add the corresponding bg color to each event box
GdkColor color;
switch(scalePlate[i][j]){
...
...
break;
}
//coloring the event box with the corresponding background
gtk_widget_modify_bg ( GTK_WIDGET(labelPlate[i][j]), GTK_STATE_NORMAL, &color);
//attach the event box to the appropriate location of my table
gtk_table_attach_defaults (GTK_TABLE (finalPlateTable), labelPlate[i][j], j, j+1, i, i+1);
//show them!
gtk_widget_show(label);
gtk_widget_realize(labelPlate[i][j]);
}
}
//adding the table to my vertical box, and show both of them
gtk_box_pack_start(GTK_BOX (verticalBox), finalPlateTable, TRUE, TRUE, 10);
gtk_widget_show (finalPlateTable);
gtk_widget_show (verticalBox);
我想指出我对 C 相当新,我不知道如何使用malloc
(但我怀疑我应该使用它,现在)。
答案 0 :(得分:0)
我找到了解决方案:
将数组初始化为:
GtkWidget **myarray;
myarray = g_new(GtkWidget *, ROWS*COLUMNS);
然后使用函数访问特定的行和列:
int returnPosAt(int row, int column){
return row*COLUMNS+column;
}
那么,你可以打电话给
myarray[returnPosAt(i, j)]=gtk_event_box_new();
所以,实际上你有一个1D数组,并且通过调用该函数可以获得2D位置(i,j)的相应1D位置。