Window management: Difference between revisions
Added Wren
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grid [button .b5 -text "Move" -command moveWin] -
grid [button .b6 -text "Resize" -command resizeWin] -</lang>
=={{header|Wren}}==
{{libheader|Gtk-3.0}}
An embedded application so we can use the Gtk3 toolkit.
The following just manipulates a window created by the application itself and works fine on Ubuntu 20.04.
<lang ecmascript>/* window_management.wren */
var GTK_WINDOW_TOPLEVEL = 0
var GTK_ORIENTATION_VERTICAL = 1
var GTK_BUTTONBOX_CENTER = 5
foreign class GtkWindow {
construct new(type) {}
foreign title=(title)
foreign setDefaultSize(width, height)
foreign add(widget)
foreign connectDestroy()
foreign showAll()
foreign iconify()
foreign deiconify()
foreign maximize()
foreign unmaximize()
foreign move(x, y)
foreign resize(width, height)
foreign hide()
foreign destroy()
}
foreign class GtkButtonBox {
construct new(orientation) {}
foreign spacing=(interval)
foreign layout=(layoutStyle)
foreign add(button)
}
foreign class GtkButton {
construct newWithLabel(label) {}
foreign connectClicked()
}
class Gdk {
foreign static flush()
}
class C {
foreign static sleep(secs)
}
var Window = GtkWindow.new(GTK_WINDOW_TOPLEVEL)
Window.title = "Window management"
Window.setDefaultSize(400, 400)
Window.connectDestroy()
class GtkCallbacks {
static btnClicked(label) {
if (label == "Minimize") {
Window.iconify()
} else if (label == "Unminimize") {
Window.deiconify()
} else if (label == "Maximize") {
Window.maximize()
} else if (label == "Unmaximize") {
Window.unmaximize()
} else if (label == "Move") {
Window.move(0, 0) // move to top left hand corner of display
} else if (label == "Resize") {
Window.resize(600, 600)
} else if (label == "Hide") {
Window.hide()
Gdk.flush()
C.sleep(5) // wait 5 seconds
Window.showAll()
} else if (label == "Close") {
Window.destroy()
}
}
}
var buttonBox = GtkButtonBox.new(GTK_ORIENTATION_VERTICAL)
buttonBox.spacing = 20
buttonBox.layout = GTK_BUTTONBOX_CENTER
Window.add(buttonBox)
var btnMin = GtkButton.newWithLabel("Minimize")
btnMin.connectClicked()
buttonBox.add(btnMin)
var btnUnmin = GtkButton.newWithLabel("Unminimize")
btnUnmin.connectClicked()
buttonBox.add(btnUnmin)
var btnMax = GtkButton.newWithLabel("Maximize")
btnMax.connectClicked()
buttonBox.add(btnMax)
var btnUnmax = GtkButton.newWithLabel("Unmaximize")
btnUnmax.connectClicked()
buttonBox.add(btnUnmax)
var btnMove = GtkButton.newWithLabel("Move")
btnMove.connectClicked()
buttonBox.add(btnMove)
var btnResize = GtkButton.newWithLabel("Resize")
btnResize.connectClicked()
buttonBox.add(btnResize)
var btnHide = GtkButton.newWithLabel("Hide")
btnHide.connectClicked()
buttonBox.add(btnHide)
var btnClose = GtkButton.newWithLabel("Close")
btnClose.connectClicked()
buttonBox.add(btnClose)
Window.showAll()</lang>
<br>
We now embed the above script in the following C program, build and run.
<lang c>/* gcc `pkg-config --cflags gtk+-3.0` -DGDK_VERSION_MIN_REQIRED=GDK_VERSION_3_2 window_management.c -o window_management `pkg-config --libs gtk+-3.0` -lwren -lm */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <gtk/gtk.h>
#include <unistd.h>
#include "wren.h"
/* C <=> Wren interface functions */
WrenVM *vm;
static void btnClicked(GtkWidget *button, gpointer user_data) {
const gchar *label = gtk_button_get_label(GTK_BUTTON(button));
wrenEnsureSlots(vm, 2);
wrenGetVariable(vm, "main", "GtkCallbacks", 0);
WrenHandle *method = wrenMakeCallHandle(vm, "btnClicked(_)");
wrenSetSlotString(vm, 1, (const char *)label);
wrenCall(vm, method);
wrenReleaseHandle(vm, method);
}
void C_gtkWindowAllocate(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenSetSlotNewForeign(vm, 0, 0, sizeof(GtkWidget*));
GtkWindowType type = (GtkWindowType)wrenGetSlotDouble(vm, 1);
*window = gtk_window_new(type);
}
void C_gtkButtonBoxAllocate(WrenVM* vm) {
GtkWidget **buttonBox = (GtkWidget **)wrenSetSlotNewForeign(vm, 0, 0, sizeof(GtkWidget*));
GtkOrientation orientation = (GtkOrientation)wrenGetSlotDouble(vm, 1);
*buttonBox = gtk_button_box_new(orientation);
}
void C_gtkButtonAllocate(WrenVM* vm) {
GtkWidget **button = (GtkWidget **)wrenSetSlotNewForeign(vm, 0, 0, sizeof(GtkWidget*));
const gchar *label = (const gchar *)wrenGetSlotString(vm, 1);
*button = gtk_button_new_with_label(label);
}
void C_setTitle(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
const gchar *title = (const gchar *)wrenGetSlotString(vm, 1);
gtk_window_set_title(GTK_WINDOW(*window), title);
}
void C_setDefaultSize(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gint width = (gint)wrenGetSlotDouble(vm, 1);
gint height = (gint)wrenGetSlotDouble(vm, 2);
gtk_window_set_default_size(GTK_WINDOW(*window), width, height);
}
void C_add(WrenVM* vm) {
GtkWidget **container = (GtkWidget **)wrenGetSlotForeign(vm, 0);
GtkWidget **widget = (GtkWidget **)wrenGetSlotForeign(vm, 1);
gtk_container_add(GTK_CONTAINER(*container), *widget);
}
void C_connectDestroy(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
g_signal_connect(*window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
}
void C_showAll(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gtk_widget_show_all(*window);
}
void C_iconify(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gtk_window_iconify(GTK_WINDOW(*window));
}
void C_deiconify(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gtk_window_deiconify(GTK_WINDOW(*window));
}
void C_maximize(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gtk_window_maximize(GTK_WINDOW(*window));
}
void C_unmaximize(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gtk_window_unmaximize(GTK_WINDOW(*window));
}
void C_move(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gint x = (gint)wrenGetSlotDouble(vm, 1);
gint y = (gint)wrenGetSlotDouble(vm, 2);
gtk_window_move(GTK_WINDOW(*window), x, y);
}
void C_resize(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gint width = (gint)wrenGetSlotDouble(vm, 1);
gint height = (gint)wrenGetSlotDouble(vm, 2);
gtk_window_resize(GTK_WINDOW(*window), width, height);
}
void C_hide(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gtk_widget_hide(*window);
}
void C_destroy(WrenVM* vm) {
GtkWidget **window = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gtk_widget_destroy(*window);
}
void C_setSpacing(WrenVM* vm) {
GtkWidget **buttonBox = (GtkWidget **)wrenGetSlotForeign(vm, 0);
gint spacing = (gint)wrenGetSlotDouble(vm, 1);
gtk_box_set_spacing(GTK_BOX(*buttonBox), spacing);
}
void C_setLayout(WrenVM* vm) {
GtkWidget **buttonBox = (GtkWidget **)wrenGetSlotForeign(vm, 0);
GtkButtonBoxStyle layoutStyle = (GtkButtonBoxStyle)wrenGetSlotDouble(vm, 1);
gtk_button_box_set_layout(GTK_BUTTON_BOX(*buttonBox), layoutStyle);
}
void C_connectClicked(WrenVM* vm) {
GtkWidget **button = (GtkWidget **)wrenGetSlotForeign(vm, 0);
g_signal_connect(*button, "clicked", G_CALLBACK(btnClicked), NULL);
}
void C_flush(WrenVM* vm) {
gdk_display_flush(gdk_display_get_default());
}
void C_sleep(WrenVM* vm) {
unsigned int secs = (unsigned int)wrenGetSlotDouble(vm, 1);
sleep(secs);
}
WrenForeignClassMethods bindForeignClass(WrenVM* vm, const char* module, const char* className) {
WrenForeignClassMethods methods;
methods.allocate = NULL;
methods.finalize = NULL;
if (strcmp(module, "main") == 0) {
if (strcmp(className, "GtkWindow") == 0) {
methods.allocate = C_gtkWindowAllocate;
} else if (strcmp(className, "GtkButtonBox") == 0) {
methods.allocate = C_gtkButtonBoxAllocate;
} else if (strcmp(className, "GtkButton") == 0) {
methods.allocate = C_gtkButtonAllocate;
}
}
return methods;
}
WrenForeignMethodFn bindForeignMethod(
WrenVM* vm,
const char* module,
const char* className,
bool isStatic,
const char* signature) {
if (strcmp(module, "main") == 0) {
if (strcmp(className, "GtkWindow") == 0) {
if (!isStatic && strcmp(signature, "title=(_)") == 0) return C_setTitle;
if (!isStatic && strcmp(signature, "setDefaultSize(_,_)") == 0) return C_setDefaultSize;
if (!isStatic && strcmp(signature, "add(_)") == 0) return C_add;
if (!isStatic && strcmp(signature, "connectDestroy()") == 0) return C_connectDestroy;
if (!isStatic && strcmp(signature, "showAll()") == 0) return C_showAll;
if (!isStatic && strcmp(signature, "iconify()") == 0) return C_iconify;
if (!isStatic && strcmp(signature, "deiconify()") == 0) return C_deiconify;
if (!isStatic && strcmp(signature, "maximize()") == 0) return C_maximize;
if (!isStatic && strcmp(signature, "unmaximize()") == 0) return C_unmaximize;
if (!isStatic && strcmp(signature, "move(_,_)") == 0) return C_move;
if (!isStatic && strcmp(signature, "resize(_,_)") == 0) return C_resize;
if (!isStatic && strcmp(signature, "hide()") == 0) return C_hide;
if (!isStatic && strcmp(signature, "destroy()") == 0) return C_destroy;
} else if (strcmp(className, "GtkButtonBox") == 0) {
if (!isStatic && strcmp(signature, "spacing=(_)") == 0) return C_setSpacing;
if (!isStatic && strcmp(signature, "layout=(_)") == 0) return C_setLayout;
if (!isStatic && strcmp(signature, "add(_)") == 0) return C_add;
} else if (strcmp(className, "GtkButton") == 0) {
if (!isStatic && strcmp(signature, "connectClicked()") == 0) return C_connectClicked;
} else if (strcmp(className, "Gdk") == 0) {
if (isStatic && strcmp(signature, "flush()") == 0) return C_flush;
} else if (strcmp(className, "C") == 0) {
if (isStatic && strcmp(signature, "sleep(_)") == 0) return C_sleep;
}
}
return NULL;
}
static void writeFn(WrenVM* vm, const char* text) {
printf("%s", text);
}
void errorFn(WrenVM* vm, WrenErrorType errorType, const char* module, const int line, const char* msg) {
switch (errorType) {
case WREN_ERROR_COMPILE:
printf("[%s line %d] [Error] %s\n", module, line, msg);
break;
case WREN_ERROR_STACK_TRACE:
printf("[%s line %d] in %s\n", module, line, msg);
break;
case WREN_ERROR_RUNTIME:
printf("[Runtime Error] %s\n", msg);
break;
}
}
char *readFile(const char *fileName) {
FILE *f = fopen(fileName, "r");
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
rewind(f);
char *script = malloc(fsize + 1);
fread(script, 1, fsize, f);
fclose(f);
script[fsize] = 0;
return script;
}
int main(int argc, char **argv) {
gtk_init(&argc, &argv);
WrenConfiguration config;
wrenInitConfiguration(&config);
config.writeFn = &writeFn;
config.errorFn = &errorFn;
config.bindForeignClassFn = &bindForeignClass;
config.bindForeignMethodFn = &bindForeignMethod;
vm = wrenNewVM(&config);
const char* module = "main";
const char* fileName = "window_management.wren";
char *script = readFile(fileName);
WrenInterpretResult result = wrenInterpret(vm, module, script);
switch (result) {
case WREN_RESULT_COMPILE_ERROR:
printf("Compile Error!\n");
break;
case WREN_RESULT_RUNTIME_ERROR:
printf("Runtime Error!\n");
break;
case WREN_RESULT_SUCCESS:
break;
}
gtk_main();
wrenFreeVM(vm);
free(script);
return 0;
}</lang>
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