ref: 5674a4e6f31616c3cd4ce725ef54086689245ebc
dir: /textscreen/txt_window.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 2006 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.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
#include <stdlib.h>
#include <string.h>
#include "doomkeys.h"
#include "txt_desktop.h"
#include "txt_gui.h"
#include "txt_main.h"
#include "txt_separator.h"
#include "txt_window.h"
void TXT_SetWindowAction(txt_window_t *window,
txt_horiz_align_t position,
txt_window_action_t *action)
{
if (window->actions[position] != NULL)
{
TXT_DestroyWidget(window->actions[position]);
}
window->actions[position] = action;
}
txt_window_t *TXT_NewWindow(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;
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");
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);
TXT_RemoveDesktopWindow(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 = (txt_widget_t *) window->actions[TXT_HORIZ_LEFT];
TXT_CalcWidgetSize(widget);
widget->x = window->window_x + 2;
widget->y = window->window_y + window->window_h - widget->h - 1;
// Adjust available space:
space_available -= widget->w;
space_left_offset += widget->w;
}
// Draw the right action
if (window->actions[TXT_HORIZ_RIGHT] != NULL)
{
widget = (txt_widget_t *) window->actions[TXT_HORIZ_RIGHT];
TXT_CalcWidgetSize(widget);
widget->x = window->window_x + window->window_w - 2 - widget->w;
widget->y = window->window_y + window->window_h - widget->h - 1;
// Adjust available space:
space_available -= widget->w;
}
// Draw the center action
if (window->actions[TXT_HORIZ_CENTER] != NULL)
{
widget = (txt_widget_t *) 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;
}
}
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], 0);
}
}
}
static void CalcActionAreaSize(txt_window_t *window,
unsigned int *w, unsigned int *h)
{
txt_widget_t *widget;
int i;
*w = 1;
*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 + 1;
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, int selected)
{
txt_widget_t *widgets;
TXT_LayoutWindow(window);
// 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, selected);
// 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 void 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;
}
}
// 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);
}
// Was one of the action area buttons pressed?
for (i=0; i<3; ++i)
{
widget = (txt_widget_t *) window->actions[i];
if (widget != NULL
&& x >= widget->x && x < (signed) (widget->x + widget->w)
&& y >= widget->y && y < (signed) (widget->y + widget->h))
{
TXT_WidgetMousePress(widget, x, y, b);
break;
}
}
}
void 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)
{
MouseButtonPress(window, c);
return;
}
// 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;
}
}
// Send to the currently selected widget
if (TXT_WidgetKeyPress(window, c))
{
return;
}
// Try all of the action buttons
for (i=0; i<3; ++i)
{
if (window->actions[i] != NULL
&& TXT_WidgetKeyPress(window->actions[i], c))
{
return;
}
}
}
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;
}