ref: 2053768a9251cbd4c731681a3e1e04c800ad21f4
dir: /textscreen/txt_window.c/
//
// Copyright(C) 2005-2014 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include "doomkeys.h"
#include "txt_label.h"
#include "txt_desktop.h"
#include "txt_gui.h"
#include "txt_io.h"
#include "txt_main.h"
#include "txt_separator.h"
#include "txt_window.h"
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <shellapi.h>
#endif
void TXT_SetWindowAction(txt_window_t *window,
txt_horiz_align_t position,
TXT_UNCAST_ARG(action))
{
TXT_CAST_ARG(txt_widget_t, action);
if (window->actions[position] != NULL)
{
TXT_DestroyWidget(window->actions[position]);
}
window->actions[position] = action;
// Maintain parent pointer.
if (action != NULL)
{
action->parent = &window->table.widget;
}
}
txt_window_t *TXT_NewWindow(const char *title)
{
int i;
txt_window_t *win;
win = malloc(sizeof(txt_window_t));
TXT_InitTable(&win->table, 1);
if (title == NULL)
{
win->title = NULL;
}
else
{
win->title = strdup(title);
}
win->x = TXT_SCREEN_W / 2;
win->y = TXT_SCREEN_H / 2;
win->horiz_align = TXT_HORIZ_CENTER;
win->vert_align = TXT_VERT_CENTER;
win->key_listener = NULL;
win->mouse_listener = NULL;
win->help_url = NULL;
TXT_AddWidget(win, TXT_NewSeparator(NULL));
for (i=0; i<3; ++i)
{
win->actions[i] = NULL;
}
TXT_AddDesktopWindow(win);
// Default actions
TXT_SetWindowAction(win, TXT_HORIZ_LEFT, TXT_NewWindowEscapeAction(win));
TXT_SetWindowAction(win, TXT_HORIZ_RIGHT, TXT_NewWindowSelectAction(win));
return win;
}
void TXT_CloseWindow(txt_window_t *window)
{
int i;
TXT_EmitSignal(window, "closed");
TXT_RemoveDesktopWindow(window);
free(window->title);
// Destroy all actions
for (i=0; i<3; ++i)
{
if (window->actions[i] != NULL)
{
TXT_DestroyWidget(window->actions[i]);
}
}
// Destroy table and window
TXT_DestroyWidget(window);
}
static void CalcWindowPosition(txt_window_t *window)
{
switch (window->horiz_align)
{
case TXT_HORIZ_LEFT:
window->window_x = window->x;
break;
case TXT_HORIZ_CENTER:
window->window_x = window->x - (window->window_w / 2);
break;
case TXT_HORIZ_RIGHT:
window->window_x = window->x - (window->window_w - 1);
break;
}
switch (window->vert_align)
{
case TXT_VERT_TOP:
window->window_y = window->y;
break;
case TXT_VERT_CENTER:
window->window_y = window->y - (window->window_h / 2);
break;
case TXT_VERT_BOTTOM:
window->window_y = window->y - (window->window_h - 1);
break;
}
}
static void LayoutActionArea(txt_window_t *window)
{
txt_widget_t *widget;
int space_available;
int space_left_offset;
// We need to calculate the available horizontal space for the center
// action widget, so that we can center it within it.
// To start with, we have the entire action area available.
space_available = window->window_w;
space_left_offset = 0;
// Left action
if (window->actions[TXT_HORIZ_LEFT] != NULL)
{
widget = window->actions[TXT_HORIZ_LEFT];
TXT_CalcWidgetSize(widget);
widget->x = window->window_x + 1;
widget->y = window->window_y + window->window_h - widget->h - 1;
// Adjust available space:
space_available -= widget->w;
space_left_offset += widget->w;
TXT_LayoutWidget(widget);
}
// Draw the right action
if (window->actions[TXT_HORIZ_RIGHT] != NULL)
{
widget = window->actions[TXT_HORIZ_RIGHT];
TXT_CalcWidgetSize(widget);
widget->x = window->window_x + window->window_w - 1 - widget->w;
widget->y = window->window_y + window->window_h - widget->h - 1;
// Adjust available space:
space_available -= widget->w;
TXT_LayoutWidget(widget);
}
// Draw the center action
if (window->actions[TXT_HORIZ_CENTER] != NULL)
{
widget = window->actions[TXT_HORIZ_CENTER];
TXT_CalcWidgetSize(widget);
// The left and right widgets have left a space sandwiched between
// them. Center this widget within that space.
widget->x = window->window_x
+ space_left_offset
+ (space_available - widget->w) / 2;
widget->y = window->window_y + window->window_h - widget->h - 1;
TXT_LayoutWidget(widget);
}
}
static void DrawActionArea(txt_window_t *window)
{
int i;
for (i=0; i<3; ++i)
{
if (window->actions[i] != NULL)
{
TXT_DrawWidget(window->actions[i]);
}
}
}
static void CalcActionAreaSize(txt_window_t *window,
unsigned int *w, unsigned int *h)
{
txt_widget_t *widget;
int i;
*w = 0;
*h = 0;
// Calculate the width of all the action widgets and use this
// to create an overall min. width of the action area
for (i=0; i<3; ++i)
{
widget = (txt_widget_t *) window->actions[i];
if (widget != NULL)
{
TXT_CalcWidgetSize(widget);
*w += widget->w;
if (widget->h > *h)
{
*h = widget->h;
}
}
}
}
// Sets size and position of all widgets in a window
void TXT_LayoutWindow(txt_window_t *window)
{
txt_widget_t *widgets = (txt_widget_t *) window;
unsigned int widgets_w;
unsigned int actionarea_w, actionarea_h;
// Calculate size of table
TXT_CalcWidgetSize(window);
// Widgets area: add one character of padding on each side
widgets_w = widgets->w + 2;
// Calculate the size of the action area
// Make window wide enough to action area
CalcActionAreaSize(window, &actionarea_w, &actionarea_h);
if (actionarea_w > widgets_w)
widgets_w = actionarea_w;
// Set the window size based on widgets_w
window->window_w = widgets_w + 2;
window->window_h = widgets->h + 1;
// If the window has a title, add an extra two lines
if (window->title != NULL)
{
window->window_h += 2;
}
// If the window has an action area, add extra lines
if (actionarea_h > 0)
{
window->window_h += actionarea_h + 1;
}
// Use the x,y position as the centerpoint and find the location to
// draw the window.
CalcWindowPosition(window);
// Set the table size and position
widgets->w = widgets_w - 2;
// widgets->h (already set)
widgets->x = window->window_x + 2;
widgets->y = window->window_y;
if (window->title != NULL)
{
widgets->y += 2;
}
// Layout the table and action area
LayoutActionArea(window);
TXT_LayoutWidget(widgets);
}
void TXT_DrawWindow(txt_window_t *window)
{
txt_widget_t *widgets;
TXT_LayoutWindow(window);
if (window->table.widget.focused)
{
TXT_BGColor(TXT_ACTIVE_WINDOW_BACKGROUND, 0);
}
else
{
TXT_BGColor(TXT_INACTIVE_WINDOW_BACKGROUND, 0);
}
TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
// Draw the window
TXT_DrawWindowFrame(window->title,
window->window_x, window->window_y,
window->window_w, window->window_h);
// Draw all widgets
TXT_DrawWidget(window);
// Draw an action area, if we have one
widgets = (txt_widget_t *) window;
if (widgets->y + widgets->h < window->window_y + window->window_h - 1)
{
// Separator for action area
TXT_DrawSeparator(window->window_x, widgets->y + widgets->h,
window->window_w);
// Action area at the window bottom
DrawActionArea(window);
}
}
void TXT_SetWindowPosition(txt_window_t *window,
txt_horiz_align_t horiz_align,
txt_vert_align_t vert_align,
int x, int y)
{
window->vert_align = vert_align;
window->horiz_align = horiz_align;
window->x = x;
window->y = y;
}
static int MouseButtonPress(txt_window_t *window, int b)
{
int x, y;
int i;
txt_widget_t *widgets;
txt_widget_t *widget;
// Lay out the window, set positions and sizes of all widgets
TXT_LayoutWindow(window);
// Get the current mouse position
TXT_GetMousePosition(&x, &y);
// Try the mouse button listener
// This happens whether it is in the window range or not
if (window->mouse_listener != NULL)
{
// Mouse listener can eat button presses
if (window->mouse_listener(window, x, y, b,
window->mouse_listener_data))
{
return 1;
}
}
// Is it within the table range?
widgets = (txt_widget_t *) window;
if (x >= widgets->x && x < (signed) (widgets->x + widgets->w)
&& y >= widgets->y && y < (signed) (widgets->y + widgets->h))
{
TXT_WidgetMousePress(window, x, y, b);
return 1;
}
// Was one of the action area buttons pressed?
for (i=0; i<3; ++i)
{
widget = window->actions[i];
if (widget != NULL
&& x >= widget->x && x < (signed) (widget->x + widget->w)
&& y >= widget->y && y < (signed) (widget->y + widget->h))
{
int was_focused;
// Main table temporarily loses focus when action area button
// is clicked. This way, any active input boxes that depend
// on having focus will save their values before the
// action is performed.
was_focused = window->table.widget.focused;
TXT_SetWidgetFocus(window, 0);
TXT_SetWidgetFocus(window, was_focused);
// Pass through mouse press.
TXT_WidgetMousePress(widget, x, y, b);
return 1;
}
}
return 0;
}
int TXT_WindowKeyPress(txt_window_t *window, int c)
{
int i;
// Is this a mouse button ?
if (c >= TXT_MOUSE_BASE && c < TXT_MOUSE_BASE + TXT_MAX_MOUSE_BUTTONS)
{
return MouseButtonPress(window, c);
}
// Try the window key spy
if (window->key_listener != NULL)
{
// key listener can eat keys
if (window->key_listener(window, c, window->key_listener_data))
{
return 1;
}
}
// Send to the currently selected widget:
if (TXT_WidgetKeyPress(window, c))
{
return 1;
}
// Try all of the action buttons
for (i=0; i<3; ++i)
{
if (window->actions[i] != NULL
&& TXT_WidgetKeyPress(window->actions[i], c))
{
return 1;
}
}
return 0;
}
void TXT_SetKeyListener(txt_window_t *window, TxtWindowKeyPress key_listener,
void *user_data)
{
window->key_listener = key_listener;
window->key_listener_data = user_data;
}
void TXT_SetMouseListener(txt_window_t *window,
TxtWindowMousePress mouse_listener,
void *user_data)
{
window->mouse_listener = mouse_listener;
window->mouse_listener_data = user_data;
}
void TXT_SetWindowFocus(txt_window_t *window, int focused)
{
TXT_SetWidgetFocus(window, focused);
}
void TXT_SetWindowHelpURL(txt_window_t *window, const char *help_url)
{
window->help_url = help_url;
}
#ifdef _WIN32
void TXT_OpenURL(const char *url)
{
ShellExecute(NULL, "open", url, NULL, NULL, SW_SHOWNORMAL);
}
#else
void TXT_OpenURL(const char *url)
{
char *cmd;
size_t cmd_len;
int retval;
cmd_len = strlen(url) + 30;
cmd = malloc(cmd_len);
#if defined(__MACOSX__)
TXT_snprintf(cmd, cmd_len, "open \"%s\"", url);
#else
// The Unix situation sucks as usual, but the closest thing to a
// standard that exists is the xdg-utils package.
if (system("xdg-open --version 2>/dev/null") != 0)
{
fprintf(stderr,
"xdg-utils is not installed. Can't open this URL:\n%s\n", url);
free(cmd);
return;
}
TXT_snprintf(cmd, cmd_len, "xdg-open \"%s\"", url);
#endif
retval = system(cmd);
if (retval != 0)
{
fprintf(stderr, "TXT_OpenURL: error executing '%s'; return code %d\n",
cmd, retval);
}
free(cmd);
}
#endif /* #ifndef _WIN32 */
void TXT_OpenWindowHelpURL(txt_window_t *window)
{
if (window->help_url != NULL)
{
TXT_OpenURL(window->help_url);
}
}
txt_window_t *TXT_MessageBox(const char *title, const char *message, ...)
{
txt_window_t *window;
char buf[256];
va_list args;
va_start(args, message);
TXT_vsnprintf(buf, sizeof(buf), message, args);
va_end(args);
window = TXT_NewWindow(title);
TXT_AddWidget(window, TXT_NewLabel(buf));
TXT_SetWindowAction(window, TXT_HORIZ_LEFT, NULL);
TXT_SetWindowAction(window, TXT_HORIZ_CENTER,
TXT_NewWindowEscapeAction(window));
TXT_SetWindowAction(window, TXT_HORIZ_RIGHT, NULL);
return window;
}